feat: remember per-satellite doppler offset in calculator

Store the last entered offset (kHz) per satellite in SharedPreferences
via SettingsRepo, and restore it when the linear transponder calculator
is shown for that satellite.

Follows the project's MVI/clean architecture:
- ISettingsRepo: getSatelliteOffset / setSatelliteOffset
- SettingsRepo: backed by SharedPreferences
- RadarState: calculatorOffsetKHz field
- RadarAction: ChangeCalculatorOffset
- RadarViewModel: loads offset on SelectTransmitter, saves on change
- CalculatorPage/DopplerFrequencyCalculator: receive offset via params
instead of accessing SharedPreferences directly from the UI layer.

.github/dependabot.yml

@@ -4,3 +4,7 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+  - package-ecosystem: "bundler"
+    directory: "/"
+    schedule:
+      interval: "never"

.gitignore

@@ -64,3 +64,4 @@ fastlane/readme.md
 /app/release/output-metadata.json
 /app/release/
 /.kotlin/sessions/
+.hermes/

AGENTS.md

@@ -8,16 +8,15 @@ All assistant-specific files (`CLAUDE.md`, `.github/copilot-instructions.md`) po
 ## Project Overview
 
 Look4Sat is an open-source, fully offline Android satellite tracker and pass predictor. It tracks 9000+ active
-satellites using TLE/OMM data from Celestrak/SatNOGS, calculates orbital positions via SGP4/SDP4 models, and displays
-passes relative to the user's location. Features include polar radar visualization, SSTV image decoding, satellite
-ground track mapping, and pass predictions up to 10 days ahead. No ads, no tracking, no network required after initial
-data download.
+satellites using Celestrak/SatNOGS orbital data, calculates positions via SGP4/SDP4, and predicts passes relative to
+the user's location. Features include polar radar visualization, SSTV image decoding, and ground track mapping. No ads,
+no tracking, no network required after initial data download.
 
-## Architecture
+## Architecture & Design
 
 **MVI (Model-View-Intent)** with unidirectional data flow:
-- `State` data class → exposed via `StateFlow` from ViewModel
-- `Action` sealed interface → user intents dispatched to ViewModel's `onAction()`
+- `State` data class (named `<Feature>State`) exposed via `StateFlow` from ViewModel
+- `Action` sealed interface (named `<Feature>Action`) dispatched to ViewModel's `onAction()`
 - Jetpack Compose UI observes state and recomposes reactively
 
 **Clean Architecture layers:**
@@ -34,9 +33,11 @@ data download.
 | `feature:satellites` | Satellite list, filtering, selection                                |
 | `feature:settings`   | User preferences                                                    |
 
-- `feature:*` modules depend only on `core:domain` + `core:presentation`. Features never depend on each other.
+**Feature isolation:**
+- `feature:*` modules depend only on `core:domain` and `core:presentation`.
+- No feature-to-feature dependencies; cross-feature communication goes through core layers.
 
-## Build & Run
+## Build & Platform
 
 ```shell
 # Debug build
@@ -50,54 +51,55 @@ data download.
 ```
 
 - **Min SDK**: 24 | **Target SDK**: 36 | **JDK**: 17
-- **Gradle**: Uses version catalog (`gradle/libs.versions.toml`) + convention plugins in `build-logic/`
+- **Gradle**: Version catalog in `gradle/libs.versions.toml` + convention plugins in `build-logic/`
 
-## Key Libraries
+## Tech Stack
 
 - **Compose** (BOM 2026.05.01) + Material3 Adaptive
-- **Navigation3** (type-safe, uses `@Serializable` NavKeys)
-- **Room** (KSP code generation) for local satellite/TLE storage
-- **OkHttp** 5.x for TLE downloads
+- **Navigation3**: Type-safe navigation with `@Serializable` nav keys
+- **Room** (KSP code generation) for local satellite/orbital storage
+- **OkHttp** 5.x for data downloads
 - **OSMDroid** for map rendering
-- **Kotlin Serialization** for navigation args and data parsing
+- **Kotlin Serialization** for navigation args and parsing
 - **Coroutines** + `StateFlow` for async/reactive patterns
-
-## Conventions
-
-- **Minimal dependencies**: Avoid adding libraries when a simple manual solution exists. Fewer deps = less maintenance.
-- **DI**: Manual — ViewModels use companion `factory()` methods with `IMainContainer` interface.
-- **Navigation**: Type-safe Compose Navigation3 with `@Serializable` data classes as nav keys.
-- **State naming**: `<Feature>State` data class + `<Feature>Action` sealed interface per feature.
-- **No feature-to-feature deps**: All cross-feature communication goes through core layers.
-- **Localization**: 7 languages (en, es, ru, si, tr, uk, zh).
+- **Localization**: 7 languages (en, es, ru, si, tr, uk, zh)
 
 ## Data Formats & Migration
 
-**TLE vs. OMM/CSV format:**
+Look4Sat supports both TLE and OMM (Orbit Mean-Elements Message) CSV formats:
 
-Look4Sat supports both TLE and OMM (Orbit Mean-Elements Message) formats for backward compatibility:
+- **TLE format**: Legacy 3-line element format limited by 5-digit NORAD IDs
+- **OMM/CSV format**: Successor format with ISO 8601 timestamps and larger NORAD ID support
+- New 5-digit NORAD IDs are exhausted; TLE is officially deprecated and OMM/CSV is the clear default
+- `DataParser.kt` supports both via `parseTLEStream()` and `parseCSVStream()`
+- Downloads auto-detect format; both produce identical `OrbitalData` objects
+- Existing code already supports transparent source transition without feature changes
+- Refresh orbital data weekly for accurate pass prediction (orbital decay)
 
-- **TLE format**: Traditional 3-line element format (deprecated). NORAD catalog numbers are 5-digit integers, which
-  are running out of space. Celestrak has signaled that TLE format will eventually be phased out.
-- **OMM/CSV format**: The future standard. CSV files contain the same orbital parameters as TLE but use ISO 8601
-  timestamps and support larger NORAD IDs. Celestrak and SatNOGS already provide OMM data in CSV format.
+## Engineering Heuristics (Lazy = Efficient)
 
-**Current implementation:**
-- `DataParser.kt` handles both `parseTLEStream()` and `parseCSVStream()` seamlessly
-- TLE data is downloaded from configured sources and stored in Room database
-- When downloading satellite data, the app automatically detects format and parses accordingly
-- Both formats produce identical `OrbitalData` objects, ensuring transparent format switching
+- Treat "lazy" as efficient, not careless: the best code is the code never written.
+- First understand the task and trace the real flow end-to-end, then climb this ladder:
+  1. Does this need to be built now? (YAGNI)
+  2. Does it already exist in this codebase? Reuse helpers/patterns before rewriting.
+  3. Does Kotlin/Java stdlib already solve it?
+  4. Does the Android/platform API already solve it?
+  5. Does an already-installed dependency solve it?
+  6. Can this be simpler (including one-liner simple)?
+  7. Only then: write the minimum code that works.
+- Prefer deletion to addition, boring over clever, and the fewest touched files.
+- Avoid new abstractions, dependencies, and boilerplate unless explicitly requested.
+- Manual DI only: ViewModels use companion `factory()` methods with `IMainContainer`.
+- Release builds use ProGuard: avoid reflection-heavy libraries unless explicitly approved.
+- When two options are similar in size, choose the edge-case-correct one.
+- If you keep a deliberate simplification (for example O(n^2) scan or global lock), leave a short comment with the ceiling and upgrade path.
+- For complex asks, challenge scope when appropriate: "Do you need X, or does Y already cover it?"
 
-**Migration path:**
-As NORAD catalog space becomes constrained, OMM/CSV will become the primary format. Look4Sat is already positioned
-to handle this transition without code changes — existing users can continue using TLE files while new sources
-transition to OMM/CSV automatically.
+## Bug-Fix Policy
 
-## Code Style
-
-- Prefer **short, focused functions** — single responsibility, easy to read.
-- **Exceptions**: Composable functions and math-heavy algorithms (SGP4/SDP4) may be longer.
-- Strict code style — no dead code, no unused imports, consistent formatting.
+- Fix root cause, not just the reported symptom.
+- If touching a shared function, inspect callers and prefer one shared fix over per-caller patches.
+- The smallest correct diff wins only after behavior is understood.
 
 ## Roadmap
 
@@ -105,12 +107,9 @@ transition to OMM/CSV automatically.
 
 ## Gotchas
 
-- Orbital math lives in `core:domain/predict/` — it's dense vector math (SGP4/SDP4). Tread carefully.
-- TLE/OMM data must be refreshed weekly for accurate predictions (satellite orbits decay). TLE format is legacy and
-  will eventually be deprecated in favor of OMM/CSV as NORAD catalog numbers approach the 5-digit limit.
+- Orbital math lives in `core:domain/predict/` — dense vector math (SGP4/SDP4). Tread carefully.
 - SSTV decoding in `feature:radar` is experimental; image quality depends on signal strength during satellite pass.
-- `build-logic/convention/` contains all shared Gradle configuration — edit there, not in individual modules.
-- ProGuard is enabled for release builds — don't add reflection-based libs or any other dependencies without asking.
+- `build-logic/convention/` contains shared Gradle configuration — edit there, not in individual modules.
 
 ## Copilot Working Mode: Code-Only
 

app/proguard-rules.pro

@@ -1,3 +0,0 @@
--keep class org.osmdroid.** { *; }
--keep class com.rtbishop.look4sat.feature.map.*TiandituTileSource* { *; }
--dontwarn org.osmdroid.**

app/src/main/AndroidManifest.xml

@@ -15,7 +15,7 @@
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
 
     <application
-        android:name="cn.bh2vsq.look4sat.MainApplication"
+        android:name=".MainApplication"
         android:allowBackup="false"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
@@ -23,7 +23,7 @@
         android:roundIcon="@mipmap/ic_launcher_round">
 
         <activity
-            android:name="cn.bh2vsq.look4sat.MainActivity"
+            android:name=".MainActivity"
             android:exported="true"
             android:theme="@style/Theme.Look4Sat.SplashScreen">
             <intent-filter>
@@ -42,7 +42,7 @@
 
         <meta-data
             android:name="android.telephony.PROPERTY_SATELLITE_DATA_OPTIMIZED"
-            android:value="cn.bh2vsq.look4sat" />
+            android:value="com.rtbishop.look4sat" />
 
     </application>
 </manifest>

app/src/main/java/com/rtbishop/look4sat/MainActivity.kt

@@ -15,7 +15,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-package cn.bh2vsq.look4sat
+package com.rtbishop.look4sat
 
 import android.content.Context
 import android.content.res.Configuration

app/src/main/java/com/rtbishop/look4sat/MainApplication.kt

@@ -15,7 +15,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-package cn.bh2vsq.look4sat
+package com.rtbishop.look4sat
 
 import android.app.Application
 import com.rtbishop.look4sat.core.data.injection.MainContainer

app/src/main/java/com/rtbishop/look4sat/MainScreen.kt

@@ -15,7 +15,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-package cn.bh2vsq.look4sat
+package com.rtbishop.look4sat
 
 import androidx.compose.animation.core.LinearEasing
 import androidx.compose.animation.core.RepeatMode
@@ -50,6 +50,7 @@ import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteDefaul
 import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteScaffold
 import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteType
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
@@ -70,6 +71,8 @@ import androidx.navigation3.runtime.rememberSaveableStateHolderNavEntryDecorator
 import androidx.navigation3.ui.NavDisplay
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.presentation.DeeplinkResolver
+import com.rtbishop.look4sat.core.presentation.ElevationThresholds
+import com.rtbishop.look4sat.core.presentation.LocalElevationThresholds
 import com.rtbishop.look4sat.core.presentation.RadarDestination
 import com.rtbishop.look4sat.core.presentation.Screen
 import com.rtbishop.look4sat.core.presentation.hasEnoughHeight
@@ -127,120 +130,128 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
     val context = LocalContext.current
     val container = (context.applicationContext as IContainerProvider).getMainContainer()
     val trackingState by container.radioTrackingService.state.collectAsStateWithLifecycle()
+    val otherSettings by container.settingsRepo.otherSettings.collectAsStateWithLifecycle()
 
-    NavigationSuiteScaffold(
-        navigationSuiteItems = {
-            navItems.forEach { screen ->
-                val isSelected = when (currentKey) {
-                    is Screen.Satellites -> screen is Screen.Satellites
-                    is Screen.Passes -> screen is Screen.Passes
-                    is Screen.Radar -> screen is Screen.Radar
-                    is Screen.Map -> screen is Screen.Map
-                    is Screen.Settings -> screen is Screen.Settings
-                    else -> false
-                }
-                item(
-                    icon = { Icon(painterResource(screen.iconResId), stringResource(screen.titleResId)) },
-                    label = { Text(stringResource(screen.titleResId)) },
-                    selected = isSelected,
-                    onClick = {
-                        if (isSelected) return@item
-                        while (backStack.size > 1) backStack.removeAt(backStack.size - 1)
-                        if (screen !is Screen.Passes) backStack.add(screen)
-                    }
-                )
-            }
-        },
-        navigationSuiteColors = NavigationSuiteDefaults.colors(
-            navigationRailContainerColor = MaterialTheme.colorScheme.surfaceContainer
-        ),
-        layoutType = when {
-            !hasEnoughHeight() && hasEnoughWidth() -> NavigationSuiteType.NavigationRail
-            !hasEnoughWidth() -> NavigationSuiteType.ShortNavigationBarCompact
-            else -> NavigationSuiteType.ShortNavigationBarMedium
-        }
+    CompositionLocalProvider(
+        LocalElevationThresholds provides ElevationThresholds(
+            low = otherSettings.lowElevation,
+            high = otherSettings.highElevation
+        )
     ) {
-        Column {
-            NavDisplay(
-                backStack = backStack,
-                modifier = Modifier.weight(1f),
-                onBack = navigateBack,
-                transitionSpec = { fadeTransition },
-                popTransitionSpec = { fadeTransition },
-                predictivePopTransitionSpec = { fadeTransition },
-                entryDecorators = listOf(
-                    // Required for saving Compose state per entry
-                    rememberSaveableStateHolderNavEntryDecorator(),
-                    // Required for ViewModel scoping per entry
-                    rememberViewModelStoreNavEntryDecorator()
-                ),
-                entryProvider = entryProvider {
-                    entry<Screen.Satellites> {
-                        SatellitesDestination(navigateUp = navigateBack)
+        NavigationSuiteScaffold(
+            navigationSuiteItems = {
+                navItems.forEach { screen ->
+                    val isSelected = when (currentKey) {
+                        is Screen.Satellites -> screen is Screen.Satellites
+                        is Screen.Passes -> screen is Screen.Passes
+                        is Screen.Radar -> screen is Screen.Radar
+                        is Screen.Map -> screen is Screen.Map
+                        is Screen.Settings -> screen is Screen.Settings
+                        else -> false
                     }
-                    entry<Screen.Passes> {
-                        PassesDestination { catNum, aosTime ->
-                            container.satelliteRepo.selectPass(catNum, aosTime)
-                            backStack.add(Screen.Radar)
-//                            navigateToRadar()
+                    item(
+                        icon = { Icon(painterResource(screen.iconResId), stringResource(screen.titleResId)) },
+                        label = { Text(stringResource(screen.titleResId)) },
+                        selected = isSelected,
+                        onClick = {
+                            if (isSelected) return@item
+                            while (backStack.size > 1) backStack.removeAt(backStack.size - 1)
+                            if (screen !is Screen.Passes) backStack.add(screen)
                         }
-                    }
-                    entry<Screen.Radar> {
-                        RadarDestination(navigateUp = navigateBack)
-                    }
-                    entry<Screen.Map> {
-                        MapDestination()
-                    }
-                    entry<Screen.Settings> {
-                        SettingsDestination()
-                    }
+                    )
                 }
-            )
-            // Radio tracking status banner
-            if (trackingState.isActive) {
-                val infiniteTransition = rememberInfiniteTransition(label = "trackingPulse")
-                val alpha by infiniteTransition.animateFloat(
-                    initialValue = 1f, targetValue = 0.4f,
-                    animationSpec = infiniteRepeatable(
-                        animation = tween(1000, easing = LinearEasing),
-                        repeatMode = RepeatMode.Reverse
-                    ), label = "pulseAlpha"
-                )
-                Row(
-                    verticalAlignment = Alignment.CenterVertically,
-                    modifier = Modifier
-                        .fillMaxWidth()
-                        .background(MaterialTheme.colorScheme.primaryContainer)
-                        .clickable {
-                            val pass = trackingState.currentPass
-                            if (pass != null) {
-                                container.satelliteRepo.selectPass(pass.catNum, pass.aosTime)
+            },
+            navigationSuiteColors = NavigationSuiteDefaults.colors(
+                navigationRailContainerColor = MaterialTheme.colorScheme.surfaceContainer
+            ),
+            layoutType = when {
+                !hasEnoughHeight() && hasEnoughWidth() -> NavigationSuiteType.NavigationRail
+                !hasEnoughWidth() -> NavigationSuiteType.ShortNavigationBarCompact
+                else -> NavigationSuiteType.ShortNavigationBarMedium
+            }
+        ) {
+            Column {
+                NavDisplay(
+                    backStack = backStack,
+                    modifier = Modifier.weight(1f),
+                    onBack = navigateBack,
+                    transitionSpec = { fadeTransition },
+                    popTransitionSpec = { fadeTransition },
+                    predictivePopTransitionSpec = { fadeTransition },
+                    entryDecorators = listOf(
+                        // Required for saving Compose state per entry
+                        rememberSaveableStateHolderNavEntryDecorator(),
+                        // Required for ViewModel scoping per entry
+                        rememberViewModelStoreNavEntryDecorator()
+                    ),
+                    entryProvider = entryProvider {
+                        entry<Screen.Satellites> {
+                            SatellitesDestination(navigateUp = navigateBack)
+                        }
+                        entry<Screen.Passes> {
+                            PassesDestination { catNum, aosTime ->
+                                container.satelliteRepo.selectPass(catNum, aosTime)
                                 backStack.add(Screen.Radar)
+//                            navigateToRadar()
                             }
                         }
-                        .padding(horizontal = 12.dp, vertical = 6.dp)
-                ) {
-                    Box(
+                        entry<Screen.Radar> {
+                            RadarDestination(navigateUp = navigateBack)
+                        }
+                        entry<Screen.Map> {
+                            MapDestination()
+                        }
+                        entry<Screen.Settings> {
+                            SettingsDestination()
+                        }
+                    }
+                )
+                // Radio tracking status banner
+                if (trackingState.isActive) {
+                    val infiniteTransition = rememberInfiniteTransition(label = "trackingPulse")
+                    val alpha by infiniteTransition.animateFloat(
+                        initialValue = 1f, targetValue = 0.4f,
+                        animationSpec = infiniteRepeatable(
+                            animation = tween(1000, easing = LinearEasing),
+                            repeatMode = RepeatMode.Reverse
+                        ), label = "pulseAlpha"
+                    )
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
                         modifier = Modifier
-                            .size(8.dp)
-                            .clip(CircleShape)
-                            .background(Color(0xFF4CAF50).copy(alpha = alpha))
-                    )
-                    Spacer(modifier = Modifier.width(8.dp))
-                    Text(
-                        text = "Tracking: ${trackingState.currentPass?.name ?: ""}",
-                        fontSize = 13.sp,
-                        fontWeight = FontWeight.Medium,
-                        color = MaterialTheme.colorScheme.onPrimaryContainer,
-                        modifier = Modifier.weight(1f)
-                    )
-                    val txOk = if (trackingState.txConnected) "TX" else ""
-                    val rxOk = if (trackingState.rxConnected) "RX" else ""
-                    Text(
-                        text = listOf(txOk, rxOk).filter { it.isNotBlank() }.joinToString("/"),
-                        fontSize = 12.sp,
-                        color = MaterialTheme.colorScheme.onPrimaryContainer
-                    )
+                            .fillMaxWidth()
+                            .background(MaterialTheme.colorScheme.primaryContainer)
+                            .clickable {
+                                val pass = trackingState.currentPass
+                                if (pass != null) {
+                                    container.satelliteRepo.selectPass(pass.catNum, pass.aosTime)
+                                    backStack.add(Screen.Radar)
+                                }
+                            }
+                            .padding(horizontal = 12.dp, vertical = 6.dp)
+                    ) {
+                        Box(
+                            modifier = Modifier
+                                .size(8.dp)
+                                .clip(CircleShape)
+                                .background(Color(0xFF4CAF50).copy(alpha = alpha))
+                        )
+                        Spacer(modifier = Modifier.width(8.dp))
+                        Text(
+                            text = "Tracking: ${trackingState.currentPass?.name ?: ""}",
+                            fontSize = 13.sp,
+                            fontWeight = FontWeight.Medium,
+                            color = MaterialTheme.colorScheme.onPrimaryContainer,
+                            modifier = Modifier.weight(1f)
+                        )
+                        val txOk = if (trackingState.txConnected) "TX" else ""
+                        val rxOk = if (trackingState.rxConnected) "RX" else ""
+                        Text(
+                            text = listOf(txOk, rxOk).filter { it.isNotBlank() }.joinToString("/"),
+                            fontSize = 12.sp,
+                            color = MaterialTheme.colorScheme.onPrimaryContainer
+                        )
+                    }
                 }
             }
         }

app/src/main/res/xml/network_security_config.xml

@@ -1,6 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <network-security-config>
-    <domain-config cleartextTrafficPermitted="true">
-        <domain includeSubdomains="true">tianditu.gov.cn</domain>
-    </domain-config>
+    <base-config cleartextTrafficPermitted="true" />
 </network-security-config>

build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/PluginSetupUtils.kt

@@ -69,7 +69,7 @@ internal fun Project.setupAndroidApp() {
             release {
                 isMinifyEnabled = true
                 isShrinkResources = true
-                proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+                proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"))
             }
         }
         androidResources {

core/data/src/main/java/com/rtbishop/look4sat/core/data/database/Look4SatDao.kt

@@ -45,7 +45,12 @@ interface Look4SatDao {
     @Query("DELETE FROM entries")
     suspend fun deleteEntries()
 
-    @Query("SELECT catnum FROM radios WHERE downlinkMode IN (:modes)")
+    @Query(
+        """
+        SELECT DISTINCT catnum FROM radios WHERE isAlive = 1
+        AND (downlinkMode IN (:modes) OR uplinkMode IN (:modes))
+        """
+    )
     suspend fun getIdsWithModes(modes: List<String>): List<Int>
 
     @Query("SELECT COUNT(*) FROM radios")

core/data/src/main/java/com/rtbishop/look4sat/core/data/framework/Ic705Controller.kt

@@ -0,0 +1,364 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.data.framework
+
+import android.bluetooth.BluetoothManager
+import android.bluetooth.BluetoothSocket
+import android.util.Log
+import com.rtbishop.look4sat.core.domain.repository.IRadioController
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import kotlinx.coroutines.withContext
+import java.io.InputStream
+import java.io.OutputStream
+import java.util.UUID
+
+/**
+ * Icom IC-705 CI-V controller over Bluetooth SPP.
+ *
+ * The IC-705 emits broadcast frames continuously (band scope, UTC, signal
+ * level, …).  A reply to any command we send may therefore be buried in
+ * that noise.  All response reads drain up to [ACK_TIMEOUT_MS] and scan the
+ * entire accumulated buffer for the frame we expect rather than assuming
+ * the very next byte is the response.
+ */
+class Ic705Controller(
+    private val bluetoothManager: BluetoothManager,
+    private val deviceAddress: String
+) : IRadioController {
+
+    private val tag = "IC705"
+    private val sppId: UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb")
+    private val ioMutex = Mutex()
+
+    /** Time budget (ms) to wait for a response amid broadcast noise. */
+    private val ACK_TIMEOUT_MS = 500L
+    /** Polling interval while draining the input buffer. */
+    private val POLL_INTERVAL_MS = 20L
+    /** Small pause after writing a command before reading the response. */
+    private val WRITE_SETTLE_MS = 50L
+
+    private var socket: BluetoothSocket? = null
+    private var outputStream: OutputStream? = null
+    private var inputStream: InputStream? = null
+
+    override var isConnected: Boolean = false
+        private set
+
+    // ── Connection ──────────────────────────────────────────────────────────
+
+    override suspend fun connect(): Boolean = withContext(Dispatchers.IO) {
+        if (isConnected) return@withContext true
+        if (deviceAddress.isBlank()) return@withContext false
+        try {
+            val device  = bluetoothManager.adapter.getRemoteDevice(deviceAddress)
+            val btSocket = device.createInsecureRfcommSocketToServiceRecord(sppId)
+            btSocket.connect()
+            socket       = btSocket
+            outputStream = btSocket.outputStream
+            inputStream  = btSocket.inputStream
+            isConnected  = true
+            // Enter VFO mode — frequency/mode commands return FA if the radio
+            // is in memory-channel mode. Safe to send regardless of current state.
+            Log.i(tag, "Connected to $deviceAddress — entering VFO mode")
+            val vfoCmd = IcomCivProtocol.buildEnterVfoModeCommand()
+            Log.d(tag, "CMD enterVfoMode → ${IcomCivProtocol.toHex(vfoCmd)}")
+            ioMutex.withLock { sendAndWaitAck(vfoCmd) }
+            true
+        } catch (e: Exception) {
+            Log.e(tag, "Connect error: ${e.message}")
+            isConnected = false
+            false
+        }
+    }
+
+    override suspend fun disconnect() {
+        withContext(Dispatchers.IO) {
+            try {
+                inputStream?.close()
+                outputStream?.close()
+                socket?.close()
+            } catch (e: Exception) {
+                Log.e(tag, "Disconnect error: ${e.message}")
+            } finally {
+                inputStream  = null
+                outputStream = null
+                socket       = null
+                isConnected  = false
+                Log.i(tag, "Disconnected from $deviceAddress")
+            }
+        }
+    }
+
+    // ── IRadioController – standard operations ──────────────────────────────
+
+    override suspend fun setFrequency(frequencyHz: Long): Boolean = withContext(Dispatchers.IO) {
+        Log.d(tag, "setFrequency: ${frequencyHz}Hz")
+        ioMutex.withLock {
+            val cmd = IcomCivProtocol.buildSetFreqCommand(frequencyHz)
+            Log.d(tag, "CMD setFreq → ${IcomCivProtocol.toHex(cmd)}")
+            sendAndWaitAck(cmd)
+        }
+    }
+
+    override suspend fun setMode(mode: String): Boolean = withContext(Dispatchers.IO) {
+        val cmd = IcomCivProtocol.buildSetModeCommand(mode) ?: run {
+            Log.w(tag, "setMode: unknown mode '$mode'")
+            return@withContext false
+        }
+        Log.d(tag, "setMode: $mode")
+        Log.d(tag, "CMD setMode → ${IcomCivProtocol.toHex(cmd)}")
+        ioMutex.withLock { sendAndWaitAck(cmd) }
+    }
+
+    override suspend fun setCtcssMode(enabled: Boolean): Boolean = withContext(Dispatchers.IO) {
+        Log.d(tag, "setCtcssMode: $enabled")
+        val cmd = IcomCivProtocol.buildCtcssModeCommand(enabled)
+        Log.d(tag, "CMD ctcssMode → ${IcomCivProtocol.toHex(cmd)}")
+        ioMutex.withLock { sendAndWaitAck(cmd) }
+    }
+
+    override suspend fun setCtcssTone(toneHz: Double): Boolean = withContext(Dispatchers.IO) {
+        Log.d(tag, "setCtcssTone: ${toneHz}Hz")
+        val cmd = IcomCivProtocol.buildSetCtcssToneCommand(toneHz)
+        Log.d(tag, "CMD ctcssTone → ${IcomCivProtocol.toHex(cmd)}")
+        ioMutex.withLock { sendAndWaitAck(cmd) }
+    }
+
+    override suspend fun readFrequencyAndMode(): Pair<Long, String>? = withContext(Dispatchers.IO) {
+        ioMutex.withLock {
+            val cmd = IcomCivProtocol.buildReadFreqCommand()
+            Log.d(tag, "CMD readFreq → ${IcomCivProtocol.toHex(cmd)}")
+            val payload = sendAndReadResponse(cmd, IcomCivProtocol.CMD_READ_FREQ) ?: return@withContext null
+            // Read-freq reply payload: [cmd byte already stripped by parseResponse] [5 freq bytes] [mode] [filter]
+            IcomCivProtocol.parseFreqModePayload(payload).also {
+                if (it != null) Log.d(tag, "readFreqMode: ${it.first}Hz, ${it.second}")
+                else Log.w(tag, "readFreqMode: parse failed, payload=${IcomCivProtocol.toHex(payload)}")
+            }
+        }
+    }
+
+    override suspend fun pttOn(): Boolean = withContext(Dispatchers.IO) {
+        Log.w(tag, "pttOn: not used for IC-705")
+        true
+    }
+
+    override suspend fun pttOff(): Boolean = withContext(Dispatchers.IO) {
+        Log.w(tag, "pttOff: not used for IC-705")
+        true
+    }
+
+    // ── IRadioController – IC-705 extended operations ───────────────────────
+
+    /** Select the band for [frequencyHz] via CMD 0x1A sub 0x00 (band stacking register). */
+    override suspend fun setBand(frequencyHz: Long): Boolean = withContext(Dispatchers.IO) {
+        val cmd = IcomCivProtocol.buildBandSelectCommand(frequencyHz) ?: run {
+            Log.w(tag, "setBand: no band code for ${frequencyHz}Hz — skipping")
+            return@withContext false
+        }
+        Log.d(tag, "CMD setBand (${frequencyHz}Hz) → ${IcomCivProtocol.toHex(cmd)}")
+        ioMutex.withLock { sendAndWaitAck(cmd) }
+    }
+
+    /** Select VFO-A (main/RX) or VFO-B (sub/TX). */
+    override suspend fun setVfo(vfoA: Boolean): Boolean = withContext(Dispatchers.IO) {
+        val cmd = if (vfoA) IcomCivProtocol.buildSelectVfoACommand()
+                  else      IcomCivProtocol.buildSelectVfoBCommand()
+        Log.d(tag, "CMD selectVFO${if (vfoA) "A" else "B"} → ${IcomCivProtocol.toHex(cmd)}")
+        ioMutex.withLock { sendAndWaitAck(cmd) }
+    }
+
+    /**
+     * Enable or disable SPLIT mode (TX on sub-VFO while listening on main VFO).
+     */
+    override suspend fun setSplitMode(enabled: Boolean): Boolean = withContext(Dispatchers.IO) {
+        val cmd = IcomCivProtocol.buildSplitModeCommand(enabled)
+        Log.d(tag, "CMD split ${if (enabled) "ON" else "OFF"} → ${IcomCivProtocol.toHex(cmd)}")
+        ioMutex.withLock { sendAndWaitAck(cmd) }
+    }
+
+    /**
+     * Set the frequency of the **currently active** VFO (CMD 0x25 sub 0x00).
+     * In split mode the radio automatically switches active VFO on PTT, so
+     * always writing to the active VFO is the correct strategy.
+     */
+    override suspend fun setWorkingFrequency(frequencyHz: Long): Boolean = withContext(Dispatchers.IO) {
+        Log.d(tag, "setWorkingFrequency (0x25/00): ${frequencyHz}Hz")
+        val cmd = IcomCivProtocol.buildSetWorkingFreqCommand(frequencyHz)
+        Log.d(tag, "CMD setWorkingFreq → ${IcomCivProtocol.toHex(cmd)}")
+        ioMutex.withLock { sendAndWaitAck(cmd) }
+    }
+
+    /**
+     * Set TX VFO frequency via CMD 0x25 sub 0x01 (unselected VFO).
+     * Sent every tracking cycle in split mode alongside [setWorkingFrequency].
+     */
+    override suspend fun setTxVfoFrequency(frequencyHz: Long): Boolean = withContext(Dispatchers.IO) {
+        Log.d(tag, "setTxVfoFrequency (0x25/01): ${frequencyHz}Hz")
+        val cmd = IcomCivProtocol.buildSetUnselectedVfoFreqCommand(frequencyHz)
+        Log.d(tag, "CMD setTxVfoFreq → ${IcomCivProtocol.toHex(cmd)}")
+        ioMutex.withLock { sendAndWaitAck(cmd) }
+    }
+
+    /**
+     * Read the frequency of the currently active VFO (CMD 0x25 sub 0x00).
+     * Used for tuning detection in split mode.
+     */
+    override suspend fun readWorkingFrequency(): Long? = withContext(Dispatchers.IO) {
+        ioMutex.withLock {
+            val cmd = IcomCivProtocol.buildReadWorkingFreqCommand()
+            Log.d(tag, "CMD readWorkingFreq → ${IcomCivProtocol.toHex(cmd)}")
+            val payload = sendAndReadResponse(cmd, IcomCivProtocol.CMD_SELECTED_VFO_FREQ) ?: return@withContext null
+            // Response payload: [sub] [5 freq bytes] — CMD byte already stripped by parseResponse
+            Log.d(tag, "readWorkingFreq: got ${payload.size} bytes: ${IcomCivProtocol.toHex(payload)}")
+            if (payload.size < 6) {
+                Log.w(tag, "readWorkingFreq: payload too short (${payload.size} bytes)")
+                return@withContext null
+            }
+            val freqBcd = payload.sliceArray(1..5)
+            val freq = IcomCivProtocol.decodeFrequencyBcd(freqBcd)
+            Log.d(tag, "readWorkingFreq: ${freq}Hz")
+            freq
+        }
+    }
+
+    /**
+     * Read the frequency of the inactive/TX VFO (CMD 0x25 sub 0x01).
+     * Used for tuning detection in split mode.
+     */
+    override suspend fun readTxVfoFrequency(): Long? = withContext(Dispatchers.IO) {
+        ioMutex.withLock {
+            val cmd = IcomCivProtocol.buildReadTxVfoFreqCommand()
+            Log.d(tag, "CMD readTxVfoFreq → ${IcomCivProtocol.toHex(cmd)}")
+            val payload = sendAndReadResponse(cmd, IcomCivProtocol.CMD_SELECTED_VFO_FREQ) ?: return@withContext null
+            // Response payload: [sub] [5 freq bytes] — CMD byte already stripped by parseResponse
+            Log.d(tag, "readTxVfoFreq: got ${payload.size} bytes: ${IcomCivProtocol.toHex(payload)}")
+            if (payload.size < 6) {
+                Log.w(tag, "readTxVfoFreq: payload too short (${payload.size} bytes)")
+                return@withContext null
+            }
+            val freqBcd = payload.sliceArray(1..5)
+            val freq = IcomCivProtocol.decodeFrequencyBcd(freqBcd)
+            Log.d(tag, "readTxVfoFreq: ${freq}Hz")
+            freq
+        }
+    }
+
+    // ── Internal I/O helpers ────────────────────────────────────────────────
+
+    /**
+     * Write [cmd] to the radio and drain the input stream for up to
+     * [ACK_TIMEOUT_MS], looking for an OK/NG acknowledgement frame.
+     */
+    private suspend fun sendAndWaitAck(cmd: ByteArray): Boolean {
+        if (!write(cmd)) return false
+        delay(WRITE_SETTLE_MS)
+        val buf = drainWithTimeout(ACK_TIMEOUT_MS)
+        val ok  = IcomCivProtocol.containsAck(buf)
+        if (!ok) Log.w(tag, "ACK not found in ${buf.size} bytes: ${IcomCivProtocol.toHex(buf)}")
+        return ok
+    }
+
+    /**
+     * Write [cmd] to the radio and drain the input stream for up to
+     * [ACK_TIMEOUT_MS], scanning for a response frame carrying [expectCmd].
+     * Returns the payload bytes of that frame, or null on timeout/error.
+     */
+    private suspend fun sendAndReadResponse(cmd: ByteArray, expectCmd: Byte): ByteArray? {
+        if (!write(cmd)) return null
+        delay(WRITE_SETTLE_MS)
+        val buf      = drainWithTimeout(ACK_TIMEOUT_MS)
+        val response = IcomCivProtocol.parseResponse(buf, expectCmd)
+        if (response == null) {
+            Log.w(tag, "No response for cmd 0x${String.format("%02X", expectCmd.toInt() and 0xFF)} " +
+                    "in ${buf.size} bytes: ${IcomCivProtocol.toHex(buf)}")
+        }
+        return response?.payload
+    }
+
+    /**
+     * Drain whatever bytes the radio has buffered within a [timeoutMs] window.
+     * Exits early as soon as a complete CI-V frame addressed to us is present
+     * in the buffer (i.e., FE FE E0 A4 … FD), so we don't waste the remaining
+     * timeout on responses that already arrived.
+     */
+    private suspend fun drainWithTimeout(timeoutMs: Long): ByteArray {
+        val result   = mutableListOf<Byte>()
+        val deadline = System.currentTimeMillis() + timeoutMs
+        val stream   = inputStream ?: return ByteArray(0)
+        while (System.currentTimeMillis() < deadline) {
+            try {
+                val available = stream.available()
+                if (available > 0) {
+                    val chunk = ByteArray(available)
+                    val read  = stream.read(chunk)
+                    if (read > 0) {
+                        result.addAll(chunk.take(read))
+                        // Exit early once we have a complete frame for us
+                        if (hasCompleteFrameForUs(result)) break
+                    }
+                } else {
+                    delay(POLL_INTERVAL_MS)
+                }
+            } catch (e: Exception) {
+                Log.e(tag, "Drain error: ${e.message}")
+                isConnected = false
+                break
+            }
+        }
+        return result.toByteArray()
+    }
+
+    /**
+     * Returns true if [buf] contains a complete CI-V frame addressed to the
+     * controller (FE FE [ADDR_CTRL] [ADDR_IC705] … FD).
+     * CI-V data bytes cannot be 0xFD, so the first 0xFD after the header is
+     * always the frame terminator.
+     */
+    private fun hasCompleteFrameForUs(buf: List<Byte>): Boolean {
+        var i = 0
+        while (i < buf.size - 4) {
+            if (buf[i]     == IcomCivProtocol.PREAMBLE    &&
+                buf[i + 1] == IcomCivProtocol.PREAMBLE    &&
+                buf[i + 2] == IcomCivProtocol.ADDR_CTRL   &&
+                buf[i + 3] == IcomCivProtocol.ADDR_IC705
+            ) {
+                for (k in i + 4 until buf.size) {
+                    if (buf[k] == IcomCivProtocol.END_OF_MSG) return true
+                }
+                return false  // header found but no FD yet
+            }
+            i++
+        }
+        return false
+    }
+
+    private fun write(bytes: ByteArray): Boolean {
+        return try {
+            outputStream?.write(bytes)
+            outputStream?.flush()
+            true
+        } catch (e: Exception) {
+            Log.e(tag, "Write error: ${e.message}")
+            isConnected = false
+            false
+        }
+    }
+}

core/data/src/main/java/com/rtbishop/look4sat/core/data/framework/IcomCivProtocol.kt

@@ -0,0 +1,352 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.data.framework
+
+import java.util.Locale
+
+/**
+ * Icom CI-V protocol encoder/decoder for the IC-705.
+ *
+ * Frame structure:
+ *   FE FE <DEST> <SRC> <CMD> [<SUB>] [<DATA...>] FD
+ *
+ * IC-705 default CI-V address : 0xA4
+ * Controller (us) address     : 0xE0
+ */
+object IcomCivProtocol {
+
+    // ── Framing constants ──────────────────────────────────────────────────
+    const val PREAMBLE: Byte      = 0xFE.toByte()
+    const val END_OF_MSG: Byte    = 0xFD.toByte()
+    const val ACK_OK: Byte        = 0xFB.toByte()
+    const val ACK_NG: Byte        = 0xFA.toByte()
+
+    // ── Address constants ──────────────────────────────────────────────────
+    /** Default CI-V address of the IC-705. */
+    const val ADDR_IC705: Byte    = 0xA4.toByte()
+    /** Default CI-V address of the controller (us). */
+    const val ADDR_CTRL: Byte     = 0xE0.toByte()
+
+    // ── Command bytes ──────────────────────────────────────────────────────
+    /** Read operating frequency (main VFO). */
+    const val CMD_READ_FREQ: Byte           = 0x03
+    /** Set operating frequency (main VFO). */
+    const val CMD_SET_FREQ: Byte            = 0x05
+    /** Set operating mode. */
+    const val CMD_SET_MODE: Byte            = 0x06
+    /** Select VFO / memory. */
+    const val CMD_SELECT_VFO: Byte          = 0x07
+    /**
+     * Select operating mode (VFO vs memory-channel).
+     * Sub 0x00 = VFO mode. Must be sent after connect if the radio is in
+     * memory-channel mode — frequency/mode commands return FA until it is.
+     */
+    const val CMD_SELECT_OP_MODE: Byte      = 0x08
+    /** Set repeater duplex / SPLIT. */
+    const val CMD_DUPLEX_SPLIT: Byte        = 0x0F
+    /** Band stacking register / band select (sub 0x00 = select, data = BCD band number). */
+    const val CMD_BAND_SELECT: Byte         = 0x1A
+    /** Read/write CTCSS tone frequency. */
+    const val CMD_CTCSS_TONE: Byte          = 0x1B
+    /** Read/write misc settings (used for enabling CTCSS encode). */
+    const val CMD_MISC_SETTING: Byte        = 0x16
+    /** Read/write selected-VFO frequency (cmd 0x25). */
+    const val CMD_SELECTED_VFO_FREQ: Byte   = 0x25
+
+    // ── Sub-command bytes ──────────────────────────────────────────────────
+    /** Sub for CMD_SELECT_VFO: select VFO-A (main). */
+    const val SUB_VFO_A: Byte   = 0x00
+    /** Sub for CMD_SELECT_VFO: select VFO-B (sub). */
+    const val SUB_VFO_B: Byte   = 0x01
+    /** Sub for CMD_DUPLEX_SPLIT: simplex / split OFF. */
+    const val SUB_SPLIT_OFF: Byte = 0x00
+    /** Sub for CMD_DUPLEX_SPLIT: SPLIT ON. */
+    const val SUB_SPLIT_ON: Byte  = 0x01
+    /** Sub for CMD_SELECTED_VFO_FREQ: selected (active) VFO frequency. */
+    const val SUB_SELECTED_VFO: Byte = 0x00
+    /** Sub for CMD_SELECTED_VFO_FREQ: unselected (inactive / TX in split) VFO frequency. */
+    const val SUB_UNSELECTED_VFO: Byte = 0x01
+    /** Sub for CMD_MISC_SETTING: CTCSS/DTCS tone squelch. */
+    const val SUB_CTCSS_SETTING: Byte = 0x42.toByte()
+
+    // ── Mode bytes ────────────────────────────────────────────────────────
+    /** Maps mode strings (upper-case) → IC-705 mode bytes. */
+    val MODE_TO_BYTE: Map<String, Byte> = mapOf(
+        "LSB"    to 0x00,
+        "USB"    to 0x01,
+        "AM"     to 0x02,
+        "CW"     to 0x03,
+        "RTTY"   to 0x04,
+        "FM"     to 0x05,
+        "WFM"    to 0x06,
+        "CW-R"   to 0x07,
+        "RTTY-R" to 0x08,
+        "DV"     to 0x12,
+        "AFSK"   to 0x05  // AFSK uses FM modulation
+    )
+
+    val BYTE_TO_MODE: Map<Byte, String> = MODE_TO_BYTE.entries.associate { it.value to it.key }
+
+    // ── Frequency BCD encoding ─────────────────────────────────────────────
+
+    /**
+     * Encode a frequency in Hz to the IC-705's 5-byte BCD format.
+     *
+     * The IC-705 uses 5 bytes, LSB pair first, with 1 Hz resolution.
+     * Example: 145,500,000 Hz → "0145500000" → pairs LSB→MSB:
+     *   [00, 00, 50, 45, 01]
+     */
+    fun encodeFrequencyBcd(frequencyHz: Long): ByteArray {
+        val digits = String.format(Locale.US, "%010d", frequencyHz)
+        val bcd = ByteArray(5)
+        for (i in 0 until 5) {
+            // digits are MSB first; we want pair index 0 = LSB pair
+            val pairIndex = 4 - i
+            val high = digits[pairIndex * 2] - '0'
+            val low  = digits[pairIndex * 2 + 1] - '0'
+            bcd[i] = ((high shl 4) or low).toByte()
+        }
+        return bcd
+    }
+
+    /**
+     * Decode 5-byte BCD frequency (LSB pair first) to Hz.
+     */
+    fun decodeFrequencyBcd(bcd: ByteArray): Long {
+        // Build digit string MSB→LSB by reversing the byte order
+        var freqHz = 0L
+        for (i in 4 downTo 0) {
+            val b    = bcd[i].toInt() and 0xFF
+            val high = b shr 4
+            val low  = b and 0x0F
+            freqHz   = freqHz * 100 + high * 10 + low
+        }
+        return freqHz
+    }
+
+    /**
+     * Encode a CTCSS tone (Hz, e.g. 67.0) to 2-byte BCD (0.1 Hz resolution).
+     * 67.0 → 670 (tenths of Hz) → BCD bytes [0x06, 0x70].
+     */
+    fun encodeCtcssToneBcd(toneHz: Double): ByteArray {
+        val tone01 = (toneHz * 10).toLong()
+        val digits = String.format(Locale.US, "%04d", tone01)
+        return byteArrayOf(
+            ((digits[0] - '0') shl 4 or (digits[1] - '0')).toByte(),
+            ((digits[2] - '0') shl 4 or (digits[3] - '0')).toByte()
+        )
+    }
+
+    // ── Message builders ───────────────────────────────────────────────────
+
+    /** Wrap payload bytes in a CI-V frame: FE FE DEST SRC ... FD. */
+    private fun frame(vararg payload: Byte): ByteArray {
+        return byteArrayOf(PREAMBLE, PREAMBLE, ADDR_IC705, ADDR_CTRL) +
+                payload +
+                byteArrayOf(END_OF_MSG)
+    }
+
+    /** Set operating frequency via CMD 0x05 (main VFO). */
+    fun buildSetFreqCommand(frequencyHz: Long): ByteArray {
+        return frame(CMD_SET_FREQ, *encodeFrequencyBcd(frequencyHz))
+    }
+
+    /**
+     * Set selected-VFO frequency via CMD 0x25 sub 0x00.
+     * This updates whichever VFO is currently active (RX or TX after split).
+     */
+    fun buildSetWorkingFreqCommand(frequencyHz: Long): ByteArray {
+        return frame(CMD_SELECTED_VFO_FREQ, SUB_SELECTED_VFO, *encodeFrequencyBcd(frequencyHz))
+    }
+
+    /**
+     * Set unselected-VFO frequency via CMD 0x25 sub 0x01.
+     * In split mode while PTT is pressed the IC-705 makes VFO-B active, so
+     * this command targets VFO-A (the RX VFO) — and vice-versa when in RX.
+     * Use this to update the TX VFO when PTT is on.
+     */
+    fun buildSetUnselectedVfoFreqCommand(frequencyHz: Long): ByteArray {
+        return frame(CMD_SELECTED_VFO_FREQ, SUB_UNSELECTED_VFO, *encodeFrequencyBcd(frequencyHz))
+    }
+
+    /** Read operating frequency (CMD 0x03). */
+    fun buildReadFreqCommand(): ByteArray = frame(CMD_READ_FREQ)
+
+    /** Read selected (active) VFO frequency (CMD 0x25 sub 0x00). */
+    fun buildReadWorkingFreqCommand(): ByteArray = frame(CMD_SELECTED_VFO_FREQ, SUB_SELECTED_VFO)
+
+    /** Read unselected (inactive/TX in split) VFO frequency (CMD 0x25 sub 0x01). */
+    fun buildReadTxVfoFreqCommand(): ByteArray = frame(CMD_SELECTED_VFO_FREQ, SUB_UNSELECTED_VFO)
+
+    /**
+     * Select band via CMD 0x1A sub 0x00.
+     * Band codes are BCD-numbered: 1=160m, 2=80m, …, 9=10m, 0x10=6m, 0x11=2m, 0x12=70cm, 0x13=23cm.
+     * Returns null if [frequencyHz] doesn't fall in a known amateur band.
+     */
+    fun buildBandSelectCommand(frequencyHz: Long): ByteArray? {
+        val code = bandCodeForFrequency(frequencyHz) ?: return null
+        return frame(CMD_BAND_SELECT, 0x00, code)
+    }
+
+    /**
+     * Map a frequency in Hz to the IC-705 band stacking register code.
+     * Codes are BCD (band number in decimal expressed as hex nibbles).
+     */
+    fun bandCodeForFrequency(frequencyHz: Long): Byte? = when {
+        frequencyHz in 1_800_000L     ..1_999_999L     -> 0x01 // 160 m
+        frequencyHz in 3_500_000L     ..3_999_999L     -> 0x02 // 80 m
+        frequencyHz in 7_000_000L     ..7_299_999L     -> 0x03 // 40 m
+        frequencyHz in 10_100_000L    ..10_149_999L    -> 0x04 // 30 m
+        frequencyHz in 14_000_000L    ..14_349_999L    -> 0x05 // 20 m
+        frequencyHz in 18_068_000L    ..18_167_999L    -> 0x06 // 17 m
+        frequencyHz in 21_000_000L    ..21_449_999L    -> 0x07 // 15 m
+        frequencyHz in 24_890_000L    ..24_989_999L    -> 0x08 // 12 m
+        frequencyHz in 28_000_000L    ..29_699_999L    -> 0x09 // 10 m
+        frequencyHz in 50_000_000L    ..53_999_999L    -> 0x10 // 6 m  (BCD 10)
+        frequencyHz in 144_000_000L   ..147_999_999L   -> 0x11 // 2 m  (BCD 11)
+        frequencyHz in 420_000_000L   ..449_999_999L   -> 0x12 // 70 cm (BCD 12)
+        frequencyHz in 1_240_000_000L ..1_299_999_999L -> 0x13 // 23 cm (BCD 13)
+        else -> null
+    }
+
+    /** Set operating mode (CMD 0x06). Filter byte is omitted — radio uses its default filter for the mode. */
+    fun buildSetModeCommand(mode: String): ByteArray? {
+        val modeByte = MODE_TO_BYTE[mode.uppercase(Locale.US)] ?: return null
+        return frame(CMD_SET_MODE, modeByte)
+    }
+
+    /** Select VFO-A (CMD 0x07 sub 0x00). */
+    fun buildSelectVfoACommand(): ByteArray = frame(CMD_SELECT_VFO, SUB_VFO_A)
+
+    /** Select VFO-B (CMD 0x07 sub 0x01). */
+    fun buildSelectVfoBCommand(): ByteArray = frame(CMD_SELECT_VFO, SUB_VFO_B)
+
+    /**
+     * Enter VFO operating mode (CMD 0x08 sub 0x00).
+     * Sent after connect — if the radio is in memory-channel mode frequency
+     * and mode commands return FA until this is issued.
+     */
+    fun buildEnterVfoModeCommand(): ByteArray = frame(CMD_SELECT_OP_MODE, 0x00)
+
+    /** Enable or disable SPLIT mode (CMD 0x0F). */
+    fun buildSplitModeCommand(enable: Boolean): ByteArray {
+        val sub = if (enable) SUB_SPLIT_ON else SUB_SPLIT_OFF
+        return frame(CMD_DUPLEX_SPLIT, sub)
+    }
+
+    /**
+     * Enable/disable CTCSS encode (CMD 0x16 sub 0x42).
+     * 0x01 = CTCSS encoder ON, 0x00 = OFF.
+     */
+    fun buildCtcssModeCommand(enabled: Boolean): ByteArray {
+        val value: Byte = if (enabled) 0x01 else 0x00
+        return frame(CMD_MISC_SETTING, SUB_CTCSS_SETTING, value)
+    }
+
+    /**
+     * Set CTCSS tone frequency (CMD 0x1B sub 0x00).
+     */
+    fun buildSetCtcssToneCommand(toneHz: Double): ByteArray {
+        val bcd = encodeCtcssToneBcd(toneHz)
+        return frame(CMD_CTCSS_TONE, 0x00, *bcd)
+    }
+
+    // ── Response parsing ───────────────────────────────────────────────────
+
+    /**
+     * Find and parse a complete CI-V response frame from a buffer.
+     *
+     * Returns the bytes between "FE FE E0 A4 <CMD>" and FD, or null if no
+     * complete frame was found. The search is tolerant of interleaved
+     * broadcast traffic.
+     *
+     * @param buf       bytes accumulated from the radio
+     * @param expectCmd the command byte we are looking for in the reply, or
+     *                  null to accept any command response from the radio
+     */
+    fun parseResponse(buf: ByteArray, expectCmd: Byte?): ParsedResponse? {
+        var i = 0
+        while (i < buf.size - 5) {
+            // Look for FE FE preamble
+            if (buf[i] != PREAMBLE || buf[i + 1] != PREAMBLE) { i++; continue }
+            val dest = buf[i + 2]
+            val src  = buf[i + 3]
+            val cmd  = buf[i + 4]
+            // We only care about frames addressed to us from the radio
+            if (dest != ADDR_CTRL || src != ADDR_IC705) { i++; continue }
+            // Find the terminating FD
+            val fdIdx = buf.indexOf(END_OF_MSG, startIndex = i + 5)
+            if (fdIdx < 0) break  // incomplete frame, wait for more data
+            val payload = buf.copyOfRange(i + 5, fdIdx)
+            if (expectCmd == null || cmd == expectCmd) {
+                return ParsedResponse(cmd, payload, fdIdx + 1)
+            }
+            i = fdIdx + 1
+        }
+        return null
+    }
+
+    private fun ByteArray.indexOf(b: Byte, startIndex: Int): Int {
+        for (k in startIndex until size) if (this[k] == b) return k
+        return -1
+    }
+
+    /**
+     * Check whether a buffer contains an OK acknowledgement (FB FD) from
+     * the radio. Tolerates broadcast noise before the ACK.
+     */
+    fun containsAck(buf: ByteArray): Boolean {
+        var i = 0
+        while (i < buf.size - 5) {
+            if (buf[i] != PREAMBLE || buf[i + 1] != PREAMBLE) { i++; continue }
+            val dest = buf[i + 2]
+            val src  = buf[i + 3]
+            val cmd  = buf[i + 4]
+            if (dest != ADDR_CTRL || src != ADDR_IC705) { i++; continue }
+            // Skip to FD
+            val fdIdx = buf.indexOf(END_OF_MSG, startIndex = i + 5)
+            if (fdIdx < 0) break
+            if (cmd == ACK_OK) return true
+            if (cmd == ACK_NG) return false
+            i = fdIdx + 1
+        }
+        return false
+    }
+
+    /**
+     * Parse frequency + mode from a CMD_READ_FREQ reply payload.
+     * Payload layout after stripping command byte: [5 freq bytes] [mode byte] [filter byte]
+     */
+    fun parseFreqModePayload(payload: ByteArray): Pair<Long, String>? {
+        if (payload.size < 6) return null
+        val freqHz = decodeFrequencyBcd(payload.copyOfRange(0, 5))
+        val mode   = BYTE_TO_MODE[payload[5]] ?: return null
+        return freqHz to mode
+    }
+
+    /** Hex dump of bytes, useful for debug logging. */
+    fun toHex(bytes: ByteArray): String =
+        bytes.joinToString(" ") { String.format(Locale.US, "%02X", it.toInt() and 0xFF) }
+
+    data class ParsedResponse(
+        val cmd: Byte,
+        val payload: ByteArray,
+        /** Index in the source buffer immediately after the FD terminator. */
+        val nextOffset: Int
+    )
+}

core/data/src/main/java/com/rtbishop/look4sat/core/data/framework/RadioTrackingService.kt

@@ -19,8 +19,10 @@ package com.rtbishop.look4sat.core.data.framework
 
 import android.bluetooth.BluetoothManager
 import android.util.Log
+import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
 import com.rtbishop.look4sat.core.domain.model.SatRadio
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
+import com.rtbishop.look4sat.core.domain.predict.SPEED_OF_LIGHT
 import com.rtbishop.look4sat.core.domain.repository.IRadioController
 import com.rtbishop.look4sat.core.domain.repository.IRadioTrackingService
 import com.rtbishop.look4sat.core.domain.repository.ISatelliteRepo
@@ -29,6 +31,7 @@ import com.rtbishop.look4sat.core.domain.repository.RadioTrackingState
 import com.rtbishop.look4sat.core.domain.utility.TransponderMapper
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.currentCoroutineContext
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -44,6 +47,8 @@ class RadioTrackingService(
 ) : IRadioTrackingService {
 
     private val tag = "RadioTracking"
+    /** Delay between each step of the split-mode init sequence (ms). */
+    private val INIT_STEP_DELAY_MS = 200L
     private val _state = MutableStateFlow(RadioTrackingState())
     override val state: StateFlow<RadioTrackingState> = _state
 
@@ -51,227 +56,427 @@ class RadioTrackingService(
     private var rxController: IRadioController? = null
     private var trackingJob: Job? = null
 
+    // ── Connection ──────────────────────────────────────────────────────────
+
     override suspend fun connectRadios() {
-        // Disconnect old controllers if any
         txController?.disconnect()
         rxController?.disconnect()
 
-        // Read current addresses from settings
         val rcSettings = settingsRepo.radioControlSettings.value
-        val txAddr = rcSettings.txRadioAddress
-        val rxAddr = rcSettings.rxRadioAddress
+        val txAddr     = rcSettings.txRadioAddress
+        val rxAddr     = rcSettings.rxRadioAddress
+        val isIcom     = rcSettings.radioModel == RadioControlSettings.MODEL_ICOM_IC705
+        val isSplit    = isIcom && rcSettings.splitMode
 
-        Log.i(tag, "Connecting TX=$txAddr RX=$rxAddr")
+        Log.i(tag, "connectRadios model=${rcSettings.radioModel} split=$isSplit TX=$txAddr RX=$rxAddr")
 
-        if (txAddr.isBlank() && rxAddr.isBlank()) {
-            _state.update { it.copy(errorMessage = "No radio addresses configured in Settings") }
-            return
-        }
-
-        val tx = Ft817Controller(bluetoothManager, txAddr)
-        val rx = Ft817Controller(bluetoothManager, rxAddr)
-        txController = tx
-        rxController = rx
-
-        _state.update { it.copy(errorMessage = null) }
-        val txOk = if (txAddr.isNotBlank()) tx.connect() else false
-        val rxOk = if (rxAddr.isNotBlank()) rx.connect() else false
-        _state.update {
-            it.copy(
-                txConnected = txOk,
-                rxConnected = rxOk,
-                errorMessage = when {
-                    !txOk && !rxOk -> "Could not connect to TX and RX radios"
-                    !txOk -> "Could not connect to TX radio ($txAddr)"
-                    !rxOk -> "Could not connect to RX radio ($rxAddr)"
-                    else -> null
-                }
-            )
+        if (isSplit) {
+            // Single-radio split mode: only TX slot is used
+            if (txAddr.isBlank()) {
+                _state.update { it.copy(errorMessage = "No radio address configured in Settings") }
+                return
+            }
+            val tx = makeController(isIcom, txAddr)
+            txController = tx
+            rxController = null
+            _state.update { it.copy(errorMessage = null) }
+            val txOk = tx.connect()
+            _state.update {
+                it.copy(
+                    txConnected = txOk,
+                    rxConnected = false,
+                    errorMessage = if (!txOk) "Could not connect to radio ($txAddr)" else null
+                )
+            }
+            Log.i(tag, "IC-705 split mode connected: txOk=$txOk")
+        } else {
+            if (txAddr.isBlank() && rxAddr.isBlank()) {
+                _state.update { it.copy(errorMessage = "No radio addresses configured in Settings") }
+                return
+            }
+            val tx = makeController(isIcom, txAddr)
+            val rx = makeController(isIcom, rxAddr)
+            txController = tx
+            rxController = rx
+            _state.update { it.copy(errorMessage = null) }
+            val txOk = if (txAddr.isNotBlank()) tx.connect() else false
+            val rxOk = if (rxAddr.isNotBlank()) rx.connect() else false
+            _state.update {
+                it.copy(
+                    txConnected = txOk,
+                    rxConnected = rxOk,
+                    errorMessage = when {
+                        !txOk && !rxOk -> "Could not connect to TX and RX radios"
+                        !txOk          -> "Could not connect to TX radio ($txAddr)"
+                        !rxOk          -> "Could not connect to RX radio ($rxAddr)"
+                        else           -> null
+                    }
+                )
+            }
+            Log.i(tag, "Dual-radio connected: txOk=$txOk rxOk=$rxOk")
         }
     }
 
+    private fun makeController(isIcom: Boolean, address: String): IRadioController =
+        if (isIcom) Ic705Controller(bluetoothManager, address)
+        else        Ft817Controller(bluetoothManager, address)
+
     override suspend fun disconnectRadios() {
         stopTracking()
         txController?.disconnect()
         rxController?.disconnect()
         txController = null
         rxController = null
-        _state.update {
-            it.copy(
-                txConnected = false,
-                rxConnected = false,
-                isActive = false
-            )
-        }
+        _state.update { it.copy(txConnected = false, rxConnected = false, isActive = false) }
     }
 
+    // ── Tracking ────────────────────────────────────────────────────────────
+
     override fun startTracking(pass: OrbitalPass, transponder: SatRadio, txBaseFreqHz: Long?) {
         _state.update {
             it.copy(
-                isActive = true,
-                currentPass = pass,
-                selectedTransponder = transponder,
-                txBaseFrequencyHz = txBaseFreqHz
+                isActive             = true,
+                currentPass          = pass,
+                selectedTransponder  = transponder,
+                txBaseFrequencyHz    = txBaseFreqHz
             )
         }
         trackingJob?.cancel()
-        trackingJob = appScope.launch {
-            // Set modes on both radios at tracking start
-            val tx = txController
-            val rx = rxController
-            val txMode = transponder.uplinkMode
-            val rxMode = transponder.downlinkMode
-                ?: transponder.uplinkMode?.let {
-                    TransponderMapper.mapUplinkModeToDownlinkMode(it, transponder.isInverted)
-                }
-            if (tx != null && tx.isConnected && txMode != null) {
-                tx.setMode(txMode)
-                Log.i(tag, "TX mode set to $txMode")
-            }
-            if (rx != null && rx.isConnected && rxMode != null) {
-                rx.setMode(rxMode)
-                Log.i(tag, "RX mode set to $rxMode")
-            }
-            // Set CTCSS if FM
-            if (txMode?.uppercase() == "FM") {
-                _state.value.ctcssTone?.let { tone ->
-                    tx?.setCtcssTone(tone)
-                    tx?.setCtcssMode(true)
-                }
-            }
-            _state.update { it.copy(txMode = txMode, rxMode = rxMode) }
 
-            var lastSetTxFreq = 0.0
-            var lastSetRxFreq = 0.0
-            var tuningRadio = "" // "", "tx", or "rx" - which radio the user is tuning
-            var lastReadFreq = 0L
-            var stableCount = 0
+        val rcSettings = settingsRepo.radioControlSettings.value
+        val isIcom     = rcSettings.radioModel == RadioControlSettings.MODEL_ICOM_IC705
+        val isSplit    = isIcom && rcSettings.splitMode
 
-            while (isActive) {
-                val currentState = _state.value
-                if (!currentState.isActive) break
-
-                val satPass = currentState.currentPass ?: break
-                val xpdr = currentState.selectedTransponder ?: break
-                var txBaseFreq = currentState.txBaseFrequencyHz
-                val stationPos = settingsRepo.stationPosition.value
-                val timeNow = System.currentTimeMillis()
-
-                val pos = satelliteRepo.getPosition(satPass.orbitalObject, stationPos, timeNow)
-                val tx = txController
-                val rx = rxController
-                val hasUplink = txBaseFreq != null
-                val c = com.rtbishop.look4sat.core.domain.predict.SPEED_OF_LIGHT
-                val v = pos.distanceRate * 1000.0
-
-                if (tuningRadio.isNotEmpty()) {
-                    // --- User is tuning: keep reading, wait for stabilization ---
-                    val radio = if (tuningRadio == "tx") tx else rx
-                    if (radio != null && radio.isConnected) {
-                        val readResult = radio.readFrequencyAndMode()
-                        if (readResult != null) {
-                            val (freq, _) = readResult
-                            if (kotlin.math.abs(freq - lastReadFreq) <= 20) {
-                                stableCount++
-                            } else {
-                                stableCount = 0
-                                lastReadFreq = freq
-                            }
-                            // Stable for 2 reads → user stopped turning
-                            if (stableCount >= 2) {
-                                if (tuningRadio == "tx" && txBaseFreq != null) {
-                                    val newBase = (freq.toDouble() * c / (c + v)).toLong()
-                                    if (newBase > 0) {
-                                        txBaseFreq = newBase
-                                        _state.update { it.copy(txBaseFrequencyHz = newBase) }
-                                        Log.i(tag, "TX tuning done → base=$newBase")
-                                    }
-                                } else if (tuningRadio == "rx") {
-                                    val rxNominal = (freq.toDouble() * c / (c - v)).toLong()
-                                    val newTxBase = TransponderMapper.mapDownlinkToUplink(rxNominal, xpdr)
-                                    if (newTxBase != null && newTxBase > 0) {
-                                        txBaseFreq = newTxBase
-                                        _state.update { it.copy(txBaseFrequencyHz = newTxBase) }
-                                        Log.i(tag, "RX tuning done → txBase=$newTxBase")
-                                    }
-                                }
-                                tuningRadio = ""
-                                stableCount = 0
-                                lastSetTxFreq = 0.0
-                                lastSetRxFreq = 0.0
-                            }
-                        }
-                    }
-                } else {
-                    // --- Normal tracking: read, detect changes, command ---
-
-                    // TX dial feedback
-                    if (hasUplink && tx != null && tx.isConnected && lastSetTxFreq > 0.0) {
-                        val readResult = tx.readFrequencyAndMode()
-                        if (readResult != null) {
-                            val (actualTxFreq, _) = readResult
-                            if (kotlin.math.abs(actualTxFreq - lastSetTxFreq) >= 20.0) {
-                                tuningRadio = "tx"
-                                lastReadFreq = actualTxFreq
-                                stableCount = 0
-                                Log.i(tag, "TX tuning detected (read=$actualTxFreq, lastSet=$lastSetTxFreq)")
-                            }
-                        }
-                    }
-
-                    // RX dial feedback (only if TX not tuning)
-                    if (tuningRadio.isEmpty() && rx != null && rx.isConnected && lastSetRxFreq > 0.0) {
-                        val readResult = rx.readFrequencyAndMode()
-                        if (readResult != null) {
-                            val (actualRxFreq, _) = readResult
-                            if (kotlin.math.abs(actualRxFreq - lastSetRxFreq) >= 20.0) {
-                                tuningRadio = "rx"
-                                lastReadFreq = actualRxFreq
-                                stableCount = 0
-                                Log.i(tag, "RX tuning detected (read=$actualRxFreq, lastSet=$lastSetRxFreq)")
-                            }
-                        }
-                    }
-                }
-
-                // Compute Doppler-corrected frequencies
-                val txRadioFreq = txBaseFreq?.let { pos.getUplinkFreq(it) }
-                val rxBaseFreq = if (txBaseFreq != null) {
-                    TransponderMapper.mapUplinkToDownlink(txBaseFreq, xpdr)
-                } else {
-                    xpdr.downlinkLow
-                }
-                val rxRadioFreq = rxBaseFreq?.let { pos.getDownlinkFreq(it) }
-
-                // Command radios (only when not tuning)
-                if (tuningRadio.isEmpty()) {
-                    if (tx != null && tx.isConnected && txRadioFreq != null) {
-                        tx.setFrequency(txRadioFreq)
-                        lastSetTxFreq = txRadioFreq.toDouble()
-                    }
-                    if (rx != null && rx.isConnected && rxRadioFreq != null) {
-                        rx.setFrequency(rxRadioFreq)
-                        lastSetRxFreq = rxRadioFreq.toDouble()
-                    }
-                }
-
-                _state.update {
-                    it.copy(
-                        txConnected = tx?.isConnected ?: false,
-                        rxConnected = rx?.isConnected ?: false,
-                        txFrequencyHz = txRadioFreq,
-                        rxFrequencyHz = rxRadioFreq,
-                        azimuth = Math.toDegrees(pos.azimuth),
-                        elevation = Math.toDegrees(pos.elevation),
-                        distance = pos.distance
-                    )
-                }
-
-                delay(1000)
-            }
+        if (isSplit) {
+            trackingJob = appScope.launch { runSplitTracking(transponder, txBaseFreqHz) }
+        } else {
+            trackingJob = appScope.launch { runDualRadioTracking(transponder, txBaseFreqHz) }
         }
     }
 
+    // ── Dual-radio tracking (Yaesu or two IC-705s) ──────────────────────────
+
+    private suspend fun runDualRadioTracking(transponder: SatRadio, initialTxBaseFreqHz: Long?) {
+        val tx = txController
+        val rx = rxController
+
+        // Initial setup: set band/mode/CTCSS on both radios
+        val txMode = transponder.uplinkMode
+        val rxMode = transponder.downlinkMode
+            ?: transponder.uplinkMode?.let {
+                TransponderMapper.mapUplinkModeToDownlinkMode(it, transponder.isInverted)
+            }
+
+        Log.i(tag, "DualRadio start: txMode=$txMode rxMode=$rxMode")
+
+        if (tx != null && tx.isConnected && txMode != null) {
+            Log.d(tag, "Setting TX mode: $txMode")
+            tx.setMode(txMode)
+        }
+        if (rx != null && rx.isConnected && rxMode != null) {
+            Log.d(tag, "Setting RX mode: $rxMode")
+            rx.setMode(rxMode)
+        }
+        if (txMode?.uppercase() == "FM") {
+            _state.value.ctcssTone?.let { tone ->
+                Log.d(tag, "Setting CTCSS: ${tone}Hz")
+                tx?.setCtcssTone(tone)
+                tx?.setCtcssMode(true)
+            }
+        }
+        _state.update { it.copy(txMode = txMode, rxMode = rxMode) }
+
+        var lastSetTxFreq = 0.0
+        var lastSetRxFreq = 0.0
+        var tuningRadio   = ""
+        var lastReadFreq  = 0L
+        var stableCount   = 0
+
+        while (currentCoroutineContext().isActive) {
+            val currentState = _state.value
+            if (!currentState.isActive) break
+
+            val satPass = currentState.currentPass ?: break
+            val xpdr    = currentState.selectedTransponder ?: break
+            var txBaseFreq = currentState.txBaseFrequencyHz
+            val stationPos = settingsRepo.stationPosition.value
+            val pos = satelliteRepo.getPosition(satPass.orbitalObject, stationPos, System.currentTimeMillis())
+            val txNow = txController
+            val rxNow = rxController
+            val v = pos.distanceRate * 1000.0
+
+            if (tuningRadio.isNotEmpty()) {
+                val radio = if (tuningRadio == "tx") txNow else rxNow
+                if (radio != null && radio.isConnected) {
+                    val read = radio.readFrequencyAndMode()
+                    if (read != null) {
+                        val (freq, _) = read
+                        if (kotlin.math.abs(freq - lastReadFreq) <= 20) stableCount++
+                        else { stableCount = 0; lastReadFreq = freq }
+                        if (stableCount >= 2) {
+                            if (tuningRadio == "tx" && txBaseFreq != null) {
+                                val newBase = (freq.toDouble() * SPEED_OF_LIGHT / (SPEED_OF_LIGHT + v)).toLong()
+                                if (newBase > 0) {
+                                    txBaseFreq = newBase
+                                    _state.update { it.copy(txBaseFrequencyHz = newBase) }
+                                    Log.i(tag, "TX tuning done → base=$newBase")
+                                }
+                            } else if (tuningRadio == "rx") {
+                                val rxNominal = (freq.toDouble() * SPEED_OF_LIGHT / (SPEED_OF_LIGHT - v)).toLong()
+                                val newTxBase = TransponderMapper.mapDownlinkToUplink(rxNominal, xpdr)
+                                if (newTxBase != null && newTxBase > 0) {
+                                    txBaseFreq = newTxBase
+                                    _state.update { it.copy(txBaseFrequencyHz = newTxBase) }
+                                    Log.i(tag, "RX tuning done → txBase=$newTxBase")
+                                }
+                            }
+                            tuningRadio   = ""
+                            stableCount   = 0
+                            lastSetTxFreq = 0.0
+                            lastSetRxFreq = 0.0
+                        }
+                    }
+                }
+            } else {
+                // Detect manual dial changes
+                if (txBaseFreq != null && txNow != null && txNow.isConnected && lastSetTxFreq > 0.0) {
+                    val read = txNow.readFrequencyAndMode()
+                    if (read != null && kotlin.math.abs(read.first - lastSetTxFreq) >= 20.0) {
+                        tuningRadio  = "tx"
+                        lastReadFreq = read.first
+                        stableCount  = 0
+                        Log.i(tag, "TX tuning detected (read=${read.first}, lastSet=$lastSetTxFreq)")
+                    }
+                }
+                if (tuningRadio.isEmpty() && rxNow != null && rxNow.isConnected && lastSetRxFreq > 0.0) {
+                    val read = rxNow.readFrequencyAndMode()
+                    if (read != null && kotlin.math.abs(read.first - lastSetRxFreq) >= 20.0) {
+                        tuningRadio  = "rx"
+                        lastReadFreq = read.first
+                        stableCount  = 0
+                        Log.i(tag, "RX tuning detected (read=${read.first}, lastSet=$lastSetRxFreq)")
+                    }
+                }
+            }
+
+            val txRadioFreq = txBaseFreq?.let { pos.getUplinkFreq(it) }
+            val rxBaseFreq  = if (txBaseFreq != null) {
+                TransponderMapper.mapUplinkToDownlink(txBaseFreq, xpdr)
+            } else xpdr.downlinkLow
+            val rxRadioFreq = rxBaseFreq?.let { pos.getDownlinkFreq(it) }
+
+            if (tuningRadio.isEmpty()) {
+                if (txNow != null && txNow.isConnected && txRadioFreq != null) {
+                    txNow.setFrequency(txRadioFreq)
+                    lastSetTxFreq = txRadioFreq.toDouble()
+                }
+                if (rxNow != null && rxNow.isConnected && rxRadioFreq != null) {
+                    rxNow.setFrequency(rxRadioFreq)
+                    lastSetRxFreq = rxRadioFreq.toDouble()
+                }
+            }
+
+            _state.update {
+                it.copy(
+                    txConnected  = txNow?.isConnected ?: false,
+                    rxConnected  = rxNow?.isConnected ?: false,
+                    txFrequencyHz = txRadioFreq,
+                    rxFrequencyHz = rxRadioFreq,
+                    azimuth      = Math.toDegrees(pos.azimuth),
+                    elevation    = Math.toDegrees(pos.elevation),
+                    distance     = pos.distance
+                )
+            }
+            delay(1000)
+        }
+    }
+
+    // ── IC-705 split-radio tracking ─────────────────────────────────────────
+
+    private suspend fun runSplitTracking(transponder: SatRadio, initialTxBaseFreqHz: Long?) {
+        val radio = txController ?: return
+        if (!radio.isConnected) return
+
+        val txMode = transponder.uplinkMode
+        val rxMode = transponder.downlinkMode
+            ?: transponder.uplinkMode?.let {
+                TransponderMapper.mapUplinkModeToDownlinkMode(it, transponder.isInverted)
+            }
+
+        // Compute nominal base frequencies
+        val txCenter = when {
+            transponder.uplinkLow != null && transponder.uplinkHigh != null ->
+                (transponder.uplinkLow!! + transponder.uplinkHigh!!) / 2
+            transponder.uplinkLow != null -> transponder.uplinkLow!!
+            else -> null
+        }
+        val rxNominal = if (txCenter != null) {
+            TransponderMapper.mapUplinkToDownlink(txCenter, transponder)
+        } else transponder.downlinkLow
+
+        val txBase = initialTxBaseFreqHz ?: txCenter
+        Log.i(tag, "IC-705 split setup: txBase=${txBase}Hz rxNominal=${rxNominal}Hz txMode=$txMode rxMode=$rxMode")
+
+        // ── Initial setup sequence ──────────────────────────────────────────
+        // Sequence per IC-705: explicitly select VFO, then band → freq → mode.
+        // ACK from each command gates the next — no fixed delays needed.
+
+        // VFO-A = RX (downlink)
+        Log.d(tag, "Split init: selecting VFO-A for RX (downlink)")
+        radio.setVfo(vfoA = true)
+        if (rxNominal != null) {
+            Log.d(tag, "Split init: VFO-A band for ${rxNominal}Hz")
+            radio.setBand(rxNominal)
+            Log.d(tag, "Split init: VFO-A freq=${rxNominal}Hz")
+            radio.setFrequency(rxNominal)
+        }
+        if (rxMode != null) {
+            Log.d(tag, "Split init: VFO-A mode=$rxMode")
+            radio.setMode(rxMode)
+        }
+
+        // VFO-B = TX (uplink)
+        Log.d(tag, "Split init: selecting VFO-B for TX (uplink)")
+        radio.setVfo(vfoA = false)
+        if (txBase != null) {
+            Log.d(tag, "Split init: VFO-B band for ${txBase}Hz")
+            radio.setBand(txBase)
+            Log.d(tag, "Split init: VFO-B freq=${txBase}Hz")
+            radio.setFrequency(txBase)
+        }
+        if (txMode != null) {
+            Log.d(tag, "Split init: VFO-B mode=$txMode")
+            radio.setMode(txMode)
+        }
+        if (txMode?.uppercase() == "FM") {
+            val tone = _state.value.ctcssTone
+            if (tone != null) {
+                Log.d(tag, "Split init: CTCSS=${tone}Hz")
+                radio.setCtcssTone(tone)
+                radio.setCtcssMode(true)
+            } else {
+                radio.setCtcssMode(false)
+            }
+        }
+
+        // Enable SPLIT on VFO-A (return display to RX VFO first)
+        Log.d(tag, "Split init: returning to VFO-A, then enabling SPLIT mode")
+        radio.setVfo(vfoA = true)
+        radio.setSplitMode(enabled = true)
+
+        _state.update { it.copy(txMode = txMode, rxMode = rxMode, txBaseFrequencyHz = txBase) }
+        Log.i(tag, "IC-705 split init done — entering tracking loop")
+
+        // ── Tracking loop with tuning detection ─────────────────────────────
+        var lastSetTxFreq = 0.0
+        var lastSetRxFreq = 0.0
+        var tuningRadio   = ""  // "tx" or "rx" when manual tuning detected
+        var lastReadFreq  = 0L
+        var stableCount   = 0
+
+        while (currentCoroutineContext().isActive) {
+            val currentState = _state.value
+            if (!currentState.isActive) break
+
+            val satPass = currentState.currentPass ?: break
+            val xpdr    = currentState.selectedTransponder ?: break
+            var txBaseFreq = currentState.txBaseFrequencyHz
+            val stationPos = settingsRepo.stationPosition.value
+            val pos = satelliteRepo.getPosition(satPass.orbitalObject, stationPos, System.currentTimeMillis())
+            val v = pos.distanceRate * 1000.0
+
+            if (tuningRadio.isNotEmpty()) {
+                // User is tuning — wait for frequency to stabilize
+                val readFreq = if (tuningRadio == "tx") radio.readTxVfoFrequency() else radio.readWorkingFrequency()
+                if (readFreq != null) {
+                    if (kotlin.math.abs(readFreq - lastReadFreq) <= 20) stableCount++
+                    else { stableCount = 0; lastReadFreq = readFreq }
+
+                    if (stableCount >= 2) {
+                        // Frequency stable — reverse-calculate base frequency
+                        if (tuningRadio == "tx" && txBaseFreq != null) {
+                            val newBase = (readFreq.toDouble() * SPEED_OF_LIGHT / (SPEED_OF_LIGHT + v)).toLong()
+                            if (newBase > 0) {
+                                txBaseFreq = newBase
+                                _state.update { it.copy(txBaseFrequencyHz = newBase) }
+                                Log.i(tag, "Split TX tuning done → base=$newBase")
+                            }
+                        } else if (tuningRadio == "rx") {
+                            val rxNominal = (readFreq.toDouble() * SPEED_OF_LIGHT / (SPEED_OF_LIGHT - v)).toLong()
+                            val newTxBase = TransponderMapper.mapDownlinkToUplink(rxNominal, xpdr)
+                            if (newTxBase != null && newTxBase > 0) {
+                                txBaseFreq = newTxBase
+                                _state.update { it.copy(txBaseFrequencyHz = newTxBase) }
+                                Log.i(tag, "Split RX tuning done → txBase=$newTxBase")
+                            }
+                        }
+                        tuningRadio   = ""
+                        stableCount   = 0
+                        lastSetTxFreq = 0.0
+                        lastSetRxFreq = 0.0
+                    }
+                }
+            } else {
+                // Detect manual dial changes
+                if (txBaseFreq != null && lastSetTxFreq > 0.0) {
+                    val readTx = radio.readTxVfoFrequency()
+                    if (readTx != null && kotlin.math.abs(readTx - lastSetTxFreq) >= 20.0) {
+                        tuningRadio  = "tx"
+                        lastReadFreq = readTx
+                        stableCount  = 0
+                        Log.i(tag, "Split TX tuning detected (read=${readTx}, lastSet=$lastSetTxFreq)")
+                    }
+                }
+                if (tuningRadio.isEmpty() && lastSetRxFreq > 0.0) {
+                    val readRx = radio.readWorkingFrequency()
+                    if (readRx != null && kotlin.math.abs(readRx - lastSetRxFreq) >= 20.0) {
+                        tuningRadio  = "rx"
+                        lastReadFreq = readRx
+                        stableCount  = 0
+                        Log.i(tag, "Split RX tuning detected (read=${readRx}, lastSet=$lastSetRxFreq)")
+                    }
+                }
+            }
+
+            // Determine Doppler-corrected frequencies
+            val txRadioFreq = txBaseFreq?.let { pos.getUplinkFreq(it) }
+            val rxBaseCalc  = if (txBaseFreq != null) {
+                TransponderMapper.mapUplinkToDownlink(txBaseFreq, xpdr)
+            } else xpdr.downlinkLow
+            val rxRadioFreq = rxBaseCalc?.let { pos.getDownlinkFreq(it) }
+
+            if (radio.isConnected && tuningRadio.isEmpty()) {
+                // Update both VFOs every cycle — no PTT polling needed.
+                // 0x25/00 = active (RX) VFO, 0x25/01 = inactive (TX) VFO.
+                if (rxRadioFreq != null) {
+                    Log.d(tag, "Split loop RX (0x25/00): ${rxRadioFreq}Hz")
+                    radio.setWorkingFrequency(rxRadioFreq)
+                    lastSetRxFreq = rxRadioFreq.toDouble()
+                }
+                if (txRadioFreq != null) {
+                    Log.d(tag, "Split loop TX (0x25/01): ${txRadioFreq}Hz")
+                    radio.setTxVfoFrequency(txRadioFreq)
+                    lastSetTxFreq = txRadioFreq.toDouble()
+                }
+            }
+
+            _state.update {
+                it.copy(
+                    txConnected   = radio.isConnected,
+                    rxConnected   = false,  // single radio
+                    txFrequencyHz = txRadioFreq,
+                    rxFrequencyHz = rxRadioFreq,
+                    azimuth       = Math.toDegrees(pos.azimuth),
+                    elevation     = Math.toDegrees(pos.elevation),
+                    distance      = pos.distance
+                )
+            }
+            delay(1000)
+        }
+    }
+
+    // ── Other IRadioTrackingService methods ─────────────────────────────────
+
     override fun stopTracking() {
         trackingJob?.cancel()
         trackingJob = null
@@ -288,7 +493,6 @@ class RadioTrackingService(
                     TransponderMapper.mapUplinkModeToDownlinkMode(it, transponder.isInverted)
                 }
             rxMode?.let { rx?.setMode(it) }
-
             if (transponder.uplinkMode?.uppercase() == "FM") {
                 _state.value.ctcssTone?.let { tone ->
                     tx?.setCtcssTone(tone)
@@ -302,21 +506,17 @@ class RadioTrackingService(
             transponder.uplinkLow != null -> transponder.uplinkLow!!
             else -> null
         }
-        // Show nominal frequencies immediately
         val rxNominal = if (txCenter != null) {
             TransponderMapper.mapUplinkToDownlink(txCenter, transponder)
-        } else {
-            // Downlink-only transponder (beacon etc.) - use downlink directly
-            transponder.downlinkLow
-        }
+        } else transponder.downlinkLow
         _state.update {
             it.copy(
                 selectedTransponder = transponder,
-                txBaseFrequencyHz = txCenter,
-                txFrequencyHz = txCenter,
-                rxFrequencyHz = rxNominal,
-                txMode = transponder.uplinkMode,
-                rxMode = transponder.downlinkMode
+                txBaseFrequencyHz   = txCenter,
+                txFrequencyHz       = txCenter,
+                rxFrequencyHz       = rxNominal,
+                txMode              = transponder.uplinkMode,
+                rxMode              = transponder.downlinkMode
                     ?: transponder.uplinkMode?.let { m ->
                         TransponderMapper.mapUplinkModeToDownlinkMode(m, transponder.isInverted)
                     }
@@ -353,5 +553,4 @@ class RadioTrackingService(
         }
         _state.update { it.copy(txMode = txMode, rxMode = rxMode) }
     }
-
 }

core/data/src/main/java/com/rtbishop/look4sat/core/data/injection/MainContainer.kt

@@ -26,8 +26,10 @@ import androidx.room.Room
 import com.rtbishop.look4sat.core.data.database.Look4SatDb
 import com.rtbishop.look4sat.core.data.framework.BluetoothReporter
 import com.rtbishop.look4sat.core.data.framework.Ft817Controller
+import com.rtbishop.look4sat.core.data.framework.Ic705Controller
 import com.rtbishop.look4sat.core.data.framework.NetworkReporter
 import com.rtbishop.look4sat.core.data.framework.RadioTrackingService
+import com.rtbishop.look4sat.core.data.repository.AmSatRepository
 import com.rtbishop.look4sat.core.data.repository.DatabaseRepo
 import com.rtbishop.look4sat.core.data.repository.SatelliteRepo
 import com.rtbishop.look4sat.core.data.repository.SelectionRepo
@@ -39,6 +41,7 @@ import com.rtbishop.look4sat.core.data.usecase.AddToCalendar
 import com.rtbishop.look4sat.core.data.usecase.AudioCapture
 import com.rtbishop.look4sat.core.data.usecase.SaveImage
 import com.rtbishop.look4sat.core.data.usecase.ShowToast
+import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
 import com.rtbishop.look4sat.core.domain.repository.IDatabaseRepo
 import com.rtbishop.look4sat.core.domain.repository.IMainContainer
 import com.rtbishop.look4sat.core.domain.repository.IRadioController
@@ -64,12 +67,14 @@ import okhttp3.OkHttpClient
 class MainContainer(private val context: Context) : IMainContainer {
 
     private val localSource = provideLocalSource()
+    private val remoteSource = provideRemoteSource()
     private val mainHandler = CoroutineExceptionHandler { _, error -> println("MainHandler: $error") }
     override val appScope = CoroutineScope(SupervisorJob() + Dispatchers.Default + mainHandler)
     override val settingsRepo = provideSettingsRepo()
     override val selectionRepo = provideSelectionRepo()
     override val satelliteRepo = provideSatelliteRepo()
     override val databaseRepo = provideDatabaseRepo()
+    override val amSatRepo by lazy { AmSatRepository(remoteSource) }
     override val radioTrackingService: IRadioTrackingService by lazy {
         val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
         RadioTrackingService(appScope, manager, satelliteRepo, settingsRepo)
@@ -106,15 +111,25 @@ class MainContainer(private val context: Context) : IMainContainer {
     }
 
     override fun provideTxRadioController(): IRadioController {
-        val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
-        val address = settingsRepo.radioControlSettings.value.txRadioAddress
-        return Ft817Controller(manager, address)
+        val manager  = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+        val settings = settingsRepo.radioControlSettings.value
+        val address  = settings.txRadioAddress
+        return if (settings.radioModel == RadioControlSettings.MODEL_ICOM_IC705) {
+            Ic705Controller(manager, address)
+        } else {
+            Ft817Controller(manager, address)
+        }
     }
 
     override fun provideRxRadioController(): IRadioController {
-        val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
-        val address = settingsRepo.radioControlSettings.value.rxRadioAddress
-        return Ft817Controller(manager, address)
+        val manager  = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+        val settings = settingsRepo.radioControlSettings.value
+        val address  = settings.rxRadioAddress
+        return if (settings.radioModel == RadioControlSettings.MODEL_ICOM_IC705) {
+            Ic705Controller(manager, address)
+        } else {
+            Ft817Controller(manager, address)
+        }
     }
 
     override fun provideSensorsRepo(): ISensorsRepo {
@@ -123,6 +138,13 @@ class MainContainer(private val context: Context) : IMainContainer {
         return SensorsRepo(manager, displayManager)
     }
 
+    override fun providePairedBluetoothDevices(): List<Pair<String, String>> = buildList {
+        try {
+            val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+            manager.adapter?.bondedDevices?.forEach { add(Pair(it.name ?: "Unknown", it.address ?: "")) }
+        } catch (_: SecurityException) {}
+    }
+
     private fun provideDatabaseRepo(): IDatabaseRepo {
         val dbDispatcher = Dispatchers.Default
         val dataParser = DataParser(dbDispatcher)

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/AmSatRepository.kt

@@ -0,0 +1,156 @@
+package com.rtbishop.look4sat.core.data.repository
+
+import com.rtbishop.look4sat.core.domain.model.SatDay
+import com.rtbishop.look4sat.core.domain.model.SatReport
+import com.rtbishop.look4sat.core.domain.model.SatSlot
+import com.rtbishop.look4sat.core.domain.model.SatStatus
+import com.rtbishop.look4sat.core.domain.model.SatStatusPage
+import com.rtbishop.look4sat.core.domain.repository.IAmSatRepository
+import com.rtbishop.look4sat.core.domain.source.IRemoteSource
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.json.JSONObject
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Locale
+import java.util.TimeZone
+
+/** One report from the AMSAT API (data layer model). */
+private data class ApiReport(
+    val id: String,
+    val name: String,
+    val callsign: String,
+    val report: String,
+    val gridSquare: String,
+    val reportedTimeUtcSec: Long
+)
+
+/** AMSAT status repository using RemoteSource (Clean Architecture: data layer handles HTTP). */
+class AmSatRepository(private val remoteSource: IRemoteSource) : IAmSatRepository {
+
+    private val isoUtcFormat = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US).apply {
+        timeZone = TimeZone.getTimeZone("UTC")
+    }
+
+    override suspend fun fetchStatus(): SatStatusPage? = withContext(Dispatchers.IO) {
+        val nowSec = System.currentTimeMillis() / 1000
+        val catalogJson = remoteSource.getAmSatCatalog() ?: return@withContext null
+        val reportsJson = remoteSource.getAmSatReports(hours = 168, limit = 500) ?: return@withContext null
+        
+        val names = parseCatalog(catalogJson)
+        val reports = parseReports(reportsJson)
+        
+        if (names.isEmpty() && reports.isEmpty()) return@withContext null
+        
+        val statuses = buildStatuses(names, reports, nowSec)
+        val reportMap = reports.associate { it.id to toSatReport(it) }
+        SatStatusPage(System.currentTimeMillis(), statuses, reportMap)
+    }
+
+    /** Parse catalog JSON to list of satellite names */
+    private fun parseCatalog(json: String): List<String> {
+        return try {
+            val arr = JSONObject(json).getJSONArray("data")
+            (0 until arr.length()).map { arr.getJSONObject(it).getString("name") }
+        } catch (e: Exception) {
+            emptyList()
+        }
+    }
+
+    /** Parse reports JSON to list of ApiReport domain objects */
+    private fun parseReports(json: String): List<ApiReport> {
+        return try {
+            val arr = JSONObject(json).getJSONArray("data")
+            (0 until arr.length()).mapNotNull { i ->
+                val o = arr.getJSONObject(i)
+                val iso = o.optString("reported_time", "")
+                if (iso.isEmpty()) null else ApiReport(
+                    id = o.optString("id", ""),
+                    name = o.optString("name", ""),
+                    callsign = o.optString("callsign", ""),
+                    report = o.optString("report", ""),
+                    gridSquare = o.optString("grid_square", ""),
+                    reportedTimeUtcSec = parseIsoUtcSec(iso)
+                )
+            }
+        } catch (e: Exception) {
+            emptyList()
+        }
+    }
+
+    /** Parse ISO 8601 UTC timestamp to epoch seconds (e.g., "2026-08-05T07:30:00Z") */
+    private fun parseIsoUtcSec(iso: String): Long {
+        return try {
+            (isoUtcFormat.parse(iso)?.time ?: 0L) / 1000
+        } catch (e: Exception) {
+            0L
+        }
+    }
+
+    /** Build one SatStatus (6 days x 12 slots) per catalog satellite, slotting reports by age. */
+    private fun buildStatuses(names: List<String>, reports: List<ApiReport>, nowSec: Long): List<SatStatus> {
+        val byName = reports.groupBy { it.name }
+        val monthAbbr = arrayOf("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec")
+        val utc = Calendar.getInstance(TimeZone.getTimeZone("UTC"))
+        val labels = (0 until 6).map { d ->
+            utc.timeInMillis = (nowSec - d * 86400L) * 1000
+            "${monthAbbr[utc.get(Calendar.MONTH)]} ${utc.get(Calendar.DAY_OF_MONTH)}"
+        }
+        return names.map { name ->
+            val slots = (0 until 72).map { slotIdx ->
+                val slotStart = nowSec - (slotIdx + 1) * 7200L
+                val slotEnd = nowSec - slotIdx * 7200L
+                val inSlot = byName[name].orEmpty().filter { it.reportedTimeUtcSec in slotStart until slotEnd }
+                if (inSlot.isEmpty()) {
+                    SatSlot(statusColor = NO_REPORT_GRAY, count = 0)
+                } else {
+                    val newest = inSlot.maxByOrNull { it.reportedTimeUtcSec }!!
+                    SatSlot(
+                        statusColor = statusColorOf(newest.report),
+                        count = inSlot.size,
+                        reportIds = inSlot.map { it.id }
+                    )
+                }
+            }
+            val days = (0 until 6).map { d ->
+                SatDay(dateLabel = labels[d], slots = slots.subList(d * 12, (d + 1) * 12))
+            }
+            SatStatus(name = name, days = days)
+        }
+    }
+
+    private fun toSatReport(r: ApiReport): SatReport {
+        val cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"))
+        cal.timeInMillis = r.reportedTimeUtcSec * 1000
+        val hh = cal.get(Calendar.HOUR_OF_DAY).toString().padStart(2, '0')
+        val mm = cal.get(Calendar.MINUTE).toString().padStart(2, '0')
+        val y = cal.get(Calendar.YEAR)
+        val mo = (cal.get(Calendar.MONTH) + 1).toString().padStart(2, '0')
+        val d = cal.get(Calendar.DAY_OF_MONTH).toString().padStart(2, '0')
+        return SatReport(
+            id = r.id,
+            statusText = r.report,
+            call = r.callsign,
+            grid = r.gridSquare,
+            dateUtc = "$y-$mo-$d",
+            timeUtc = "$hh:$mm UTC"
+        )
+    }
+
+    /** Map status text to color value (for UI rendering). */
+    private fun statusColorOf(report: String): Long = when (report.lowercase()) {
+        "heard", "crew active" -> ACTIVE_BLUE
+        "telemetry only" -> TLM_ORANGE
+        "not heard" -> NOT_HEARD_PINK
+        else -> CONFLICT_DEEP_ORANGE
+    }
+
+    companion object {
+        // AMSAT official status colors (from amsat.org/status)
+        private const val ACTIVE_BLUE = 0xFF648FFF
+        private const val TLM_ORANGE = 0xFFFFB000
+        private const val NOT_HEARD_PINK = 0xFFDC267F
+        private const val CONFLICT_DEEP_ORANGE = 0xFFFE6100
+        private const val NO_REPORT_GRAY = 0xFFC0C0C0
+    }
+}

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/DatabaseRepo.kt

@@ -42,21 +42,26 @@ class DatabaseRepo(
 
     private val customSourceType = "Other"
 
-    override suspend fun updateTLEFromFile(uri: String) = withContext(dispatcher) {
+    override suspend fun updateTLEFromFile(uri: String): Int = withContext(dispatcher) {
+        var importedCount = 0
         remoteSource.getFileStream(uri)?.let { stream ->
-            val entries = dataParser.parseTLEStream(unwrapIfZipped(uri, stream))
+            val entries = parseSatelliteStream(uri, unwrapIfZipped(uri, stream))
             localSource.insertEntries(entries)
-            settingsRepo.setSatelliteTypeIds(customSourceType, entries.map { it.catnum })
+            importedCount = entries.size
         }
         setUpdateSuccessful(System.currentTimeMillis())
+        importedCount
     }
 
-    override suspend fun updateTransceiversFromFile(uri: String) = withContext(dispatcher) {
+    override suspend fun updateTransceiversFromFile(uri: String): Int = withContext(dispatcher) {
+        var importedCount = 0
         remoteSource.getFileStream(uri)?.let { stream ->
             val transceivers = dataParser.parseJSONStream(unwrapIfZipped(uri, stream))
             localSource.insertRadios(transceivers)
+            importedCount = transceivers.size
         }
         setUpdateSuccessful(System.currentTimeMillis())
+        importedCount
     }
 
     override suspend fun updateFromRemote() = withContext(dispatcher) {
@@ -72,12 +77,9 @@ class DatabaseRepo(
         // launch all network requests concurrently
         val tleJobs = tleUrls.values.map { url -> async { url to remoteSource.getNetworkStream(url) } }
         val radioJobs = radioUrls.values.map { url -> async { url to remoteSource.getNetworkStream(url) } }
-        // parse fetched data concurrently and associate with types
+        // parse fetched data concurrently
         val importedEntries = tleJobs.awaitAll().flatMap { (url, stream) ->
-            val type = tleUrls.entries.find { it.value == url }?.key ?: customSourceType
-            stream?.let { parseSatelliteStream(url, unwrapIfZipped(url, it)) }.orEmpty().also { entries ->
-                settingsRepo.setSatelliteTypeIds(type, entries.map { it.catnum })
-            }
+            stream?.let { parseSatelliteStream(url, unwrapIfZipped(url, it)) }.orEmpty()
         }
         val importedRadios = radioJobs.awaitAll().flatMap { (url, stream) ->
             stream?.let { dataParser.parseJSONStream(unwrapIfZipped(url, it)) }.orEmpty()
@@ -94,9 +96,31 @@ class DatabaseRepo(
         setUpdateSuccessful(0L)
     }
 
-    private suspend fun parseSatelliteStream(url: String, stream: InputStream): List<OrbitalData> = when {
-        url.contains("FORMAT=csv", ignoreCase = true) -> dataParser.parseCSVStream(stream)
-        else -> dataParser.parseTLEStream(stream)
+    private suspend fun parseSatelliteStream(url: String, stream: InputStream): List<OrbitalData> {
+        val bufferedStream = stream.buffered()
+        return when {
+            hasCsvHint(url) || looksLikeCsv(bufferedStream) -> dataParser.parseCSVStream(bufferedStream)
+            else -> dataParser.parseTLEStream(bufferedStream)
+        }
+    }
+
+    private fun hasCsvHint(url: String): Boolean {
+        return url.contains("FORMAT=csv", ignoreCase = true) ||
+            url.endsWith(".csv", ignoreCase = true) ||
+            url.endsWith(".csv.zip", ignoreCase = true)
+    }
+
+    private fun looksLikeCsv(stream: InputStream): Boolean {
+        if (!stream.markSupported()) return false
+        stream.mark(4096)
+        val preview = ByteArray(4096)
+        val length = stream.read(preview)
+        stream.reset()
+        if (length <= 0) return false
+        val line = preview.decodeToString(0, length).lineSequence().firstOrNull()?.trim().orEmpty()
+        return line.contains("OBJECT_NAME", ignoreCase = true) ||
+            line.contains("NORAD_CAT_ID", ignoreCase = true) ||
+            line.count { it == ',' } >= 4
     }
 
     private suspend fun setUpdateSuccessful(timestamp: Long) {

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SatelliteRepo.kt

@@ -34,8 +34,11 @@ import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.withContext
+import java.util.TimeZone
+import kotlin.time.Duration.Companion.milliseconds
 
 class SatelliteRepo(
     private val dispatcher: CoroutineDispatcher,
@@ -62,11 +65,23 @@ class SatelliteRepo(
     override suspend fun getRadiosWithId(id: Int) = localStorage.getRadiosWithId(id)
 
     override suspend fun initRepository() = withContext(dispatcher) {
-        settingsRepo.selectedIds.collect { selectedIds ->
-            _satellites.update { localStorage.getEntriesWithIds(selectedIds) }
-            val (_, hoursAhead, minElevation, modes) = settingsRepo.passesSettings.value
-            calculatePasses(System.currentTimeMillis(), hoursAhead, minElevation, modes)
-        }
+        combine(
+            settingsRepo.selectedIds,
+            settingsRepo.stationPosition
+        ) { selectedIds, _ -> selectedIds }
+            .collect { selectedIds ->
+                _satellites.update { localStorage.getEntriesWithIds(selectedIds) }
+                val settings = settingsRepo.passesSettings.value
+                calculatePasses(
+                    time = System.currentTimeMillis(),
+                    hoursAhead = settings.hoursAhead,
+                    minElevation = settings.minElevation,
+                    aosStartMinute = settings.aosStartMinute,
+                    aosEndMinute = settings.aosEndMinute,
+                    invertAosTimeWindow = settings.invertAosTimeWindow,
+                    modes = settingsRepo.selectedSatModes.value
+                )
+            }
     }
 
     override suspend fun getPosition(sat: OrbitalObject, pos: GeoPos, time: Long): OrbitalPos {
@@ -105,7 +120,15 @@ class SatelliteRepo(
         }
     }
 
-    override suspend fun calculatePasses(time: Long, hoursAhead: Int, minElevation: Double, modes: List<String>) {
+    override suspend fun calculatePasses(
+        time: Long,
+        hoursAhead: Int,
+        minElevation: Double,
+        aosStartMinute: Int,
+        aosEndMinute: Int,
+        invertAosTimeWindow: Boolean,
+        modes: List<String>
+    ) {
         _isCalculating.value = true
         // Normalize to the start of the current minute so that coarse 60-second stepping
         // in getLeoPass always begins from the same phase, producing stable AOS/LOS times
@@ -130,18 +153,40 @@ class SatelliteRepo(
             val newPasses = ArrayList<OrbitalPass>()
             for (list in passLists) {
                 for (pass in list) {
-                    if (pass.losTime > time && pass.aosTime < timeFuture && pass.maxElevation > minElevation) {
+                    if (
+                        pass.losTime > time
+                        && pass.aosTime < timeFuture
+                        && pass.maxElevation > minElevation
+                        && (pass.isDeepSpace || isAosInRange(pass.aosTime, aosStartMinute, aosEndMinute, invertAosTimeWindow))
+                    ) {
                         newPasses.add(pass)
                     }
                 }
             }
             newPasses.sortBy { it.aosTime }
-            delay(1000) // Simulate loading time for better UX
+            delay(1000.milliseconds) // Simulate loading time for better UX
             _passes.update { newPasses }
         }
         _isCalculating.value = false
     }
 
+    private fun isAosInRange(
+        aosTime: Long,
+        aosStartMinute: Int,
+        aosEndMinute: Int,
+        invertAosTimeWindow: Boolean
+    ): Boolean {
+        val offsetMillis = TimeZone.getDefault().getOffset(aosTime).toLong()
+        val localMillis = Math.floorMod(aosTime + offsetMillis, 24L * 60L * 60L * 1000L)
+        val aosMinute = (localMillis / 60_000L).toInt()
+        val inRange = if (aosStartMinute <= aosEndMinute) {
+            aosMinute in aosStartMinute..aosEndMinute
+        } else {
+            aosMinute !in (aosEndMinute + 1)..<aosStartMinute
+        }
+        return if (invertAosTimeWindow) !inRange else inRange
+    }
+
     private fun OrbitalObject.getPasses(pos: GeoPos, time: Long, hours: Int): List<OrbitalPass> {
         val passes = mutableListOf<OrbitalPass>()
         val endDate = time + hours * 60L * 60L * 1000L

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SelectionRepo.kt

@@ -38,16 +38,16 @@ class SelectionRepo(
 ) : ISelectionRepo {
 
     private val currentItems = MutableStateFlow<List<SatItem>>(emptyList())
-    private val currentTypes = MutableStateFlow(settingsRepo.selectedTypes.value)
     private val currentQuery = MutableStateFlow("")
 
-    // Resolve type IDs once when types change, then filter items reactively.
+    // Resolve sat IDs once when modes change, then filter items reactively.
     // The HashSet gives O(1) catnum lookups instead of O(n) with a List.
-    private val itemsWithTypes = currentTypes.flatMapLatest { types: List<String> ->
-        val catnumSet: Set<Int>? = if (types.isEmpty()) {
+    // Directly observe settingsRepo.selectedSatModes to ensure real-time sync across screens.
+    private val itemsWithModes = settingsRepo.selectedSatModes.flatMapLatest { list: List<String> ->
+        val catnumSet: Set<Int>? = if (list.isEmpty()) {
             null // null = no filtering
         } else {
-            val ids = settingsRepo.getSatelliteTypesIds(types)
+            val ids = localSource.getIdsWithModes(list)
             if (ids.isEmpty()) null else ids.toHashSet()
         }
         currentItems.map { items ->
@@ -56,14 +56,18 @@ class SelectionRepo(
     }
 
     private val itemsWithQuery = currentQuery.flatMapLatest { query ->
-        itemsWithTypes.map { items -> filterByQuery(items, query) }
+        itemsWithModes.map { items ->
+            filterByQuery(items, query).sortedWith(
+                compareByDescending<SatItem> { it.isSelected }
+                    .thenBy { it.name }
+                    .thenBy { it.catnum }
+            )
+        }
     }
 
-    override fun getCurrentTypes() = currentTypes.value
+    override fun getCurrentModes() = settingsRepo.selectedSatModes.value
 
-    override fun getTypesList() = Sources.satelliteDataUrls.keys.sorted().toMutableList().apply {
-        removeAt(0)
-    }
+    override fun getModesList() = Sources.satelliteModes
 
     override suspend fun getEntriesFlow() = withContext(dispatcher) {
         val selectedIds = settingsRepo.selectedIds.value.toHashSet()
@@ -73,9 +77,8 @@ class SelectionRepo(
         return@withContext itemsWithQuery
     }
 
-    override suspend fun setTypes(types: List<String>) {
-        currentTypes.value = types
-        settingsRepo.setSelectedTypes(types)
+    override suspend fun setModes(modes: List<String>) {
+        settingsRepo.setSelectedSatModes(modes)
     }
 
     override suspend fun setQuery(query: String) {

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SettingsRepo.kt

@@ -25,7 +25,6 @@ import androidx.core.location.LocationListenerCompat
 import androidx.core.location.LocationManagerCompat
 import com.rtbishop.look4sat.core.domain.model.DataSourcesSettings
 import com.rtbishop.look4sat.core.domain.model.DatabaseState
-import com.rtbishop.look4sat.core.domain.model.MapSource
 import com.rtbishop.look4sat.core.domain.model.OtherSettings
 import com.rtbishop.look4sat.core.domain.model.PassesSettings
 import com.rtbishop.look4sat.core.domain.model.RCSettings
@@ -38,6 +37,7 @@ import com.rtbishop.look4sat.core.domain.utility.round
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.update
+import org.json.JSONObject
 
 class SettingsRepo(
     private val locationManager: LocationManager,
@@ -55,6 +55,9 @@ class SettingsRepo(
     private val keyFilterShowDeepSpace = "filterShowDeepSpace"
     private val keyFilterHoursAhead = "filterHoursAhead"
     private val keyFilterMinElevation = "filterMinElevation"
+    private val keyFilterAosStartMinute = "filterAosStartMinute"
+    private val keyFilterAosEndMinute = "filterAosEndMinute"
+    private val keyFilterAosInvert = "filterAosInvert"
     private val keyNumberOfRadios = "numberOfRadios"
     private val keyNumberOfSatellites = "numberOfSatellites"
     private val keyRotatorAddress = "rotatorAddress"
@@ -66,8 +69,7 @@ class SettingsRepo(
     private val keyFrequencyPort = "frequencyPort"
     private val keyFrequencyFormat = "frequencyFormat"
     private val keySelectedIds = "selectedIds"
-    private val keySelectedTypes = "selectedTypes"
-    private val keySelectedModes = "selectedModes"
+    private val keySelectedSatModes = "selectedSatModes"
     private val keyStateOfAutoUpdate = "stateOfAutoUpdate"
     private val keyStateOfSensors = "stateOfSensors"
     private val keyStateOfSweep = "stateOfSweep"
@@ -83,8 +85,10 @@ class SettingsRepo(
     private val keyShouldSeeWarning = "shouldSeeWarning"
     private val keyShouldSeeWhatsNew = "shouldSeeWhatsNew_v$appVersionName"
     private val keySstvMode = "sstvMode"
-    private val keyMapSource = "mapSource"
-    private val keyTiandituKey = "tiandituKey"
+    private val keyLowElevation = "lowElevation"
+    private val keyHighElevation = "highElevation"
+    private val keyRadarCompassOffset = "radarCompassOffset"
+    private val keyRadarCompassOffsetElev = "radarCompassOffsetElev"
     private val keyUseCustomTle = "useCustomTle"
     private val keyUseCustomTransceivers = "useCustomTransceivers"
     private val keyTleUrl = "tleUrl"
@@ -93,9 +97,9 @@ class SettingsRepo(
 
     //region # Satellites selection settings
     private val _satelliteSelection = MutableStateFlow(getSelectedIds())
-    private val _typesSelection = MutableStateFlow(getSelectedTypes())
+    private val _satelliteModeSelection = MutableStateFlow(getSelectedSatModes())
     override val selectedIds: StateFlow<List<Int>> = _satelliteSelection
-    override val selectedTypes: StateFlow<List<String>> = _typesSelection
+    override val selectedSatModes: StateFlow<List<String>> = _satelliteModeSelection
 
     override fun setSelectedIds(ids: List<Int>) {
         val selectionString = ids.joinToString(separatorComma)
@@ -103,10 +107,10 @@ class SettingsRepo(
         _satelliteSelection.value = ids
     }
 
-    override fun setSelectedTypes(types: List<String>) {
-        val typesString = types.joinToString(separatorComma)
-        preferences.edit { putString(keySelectedTypes, typesString) }
-        _typesSelection.value = types
+    override fun setSelectedSatModes(modes: List<String>) {
+        val modesString = modes.joinToString(separatorComma)
+        preferences.edit { putString(keySelectedSatModes, modesString) }
+        _satelliteModeSelection.value = modes
     }
 
     private fun getSelectedIds(): List<Int> {
@@ -115,10 +119,10 @@ class SettingsRepo(
         return selectionString.split(separatorComma).map { it.toInt() }
     }
 
-    private fun getSelectedTypes(): List<String> {
-        val typesString = preferences.getString(keySelectedTypes, "Amateur")
-        if (typesString.isNullOrEmpty()) return emptyList()
-        return typesString.split(separatorComma)
+    private fun getSelectedSatModes(): List<String> {
+        val modesString = preferences.getString(keySelectedSatModes, null)
+        if (modesString.isNullOrEmpty()) return emptyList()
+        return modesString.split(separatorComma).sorted()
     }
     //endregion
 
@@ -130,7 +134,9 @@ class SettingsRepo(
         putBoolean(keyFilterShowDeepSpace, settings.showDeepSpace)
         putInt(keyFilterHoursAhead, settings.hoursAhead)
         putLong(keyFilterMinElevation, settings.minElevation.toRawBits())
-        putString(keySelectedModes, settings.selectedModes.joinToString(separatorComma))
+        putInt(keyFilterAosStartMinute, settings.aosStartMinute)
+        putInt(keyFilterAosEndMinute, settings.aosEndMinute)
+        putBoolean(keyFilterAosInvert, settings.invertAosTimeWindow)
         _passesSettings.value = settings
     }
 
@@ -138,9 +144,17 @@ class SettingsRepo(
         val showDeepSpace = preferences.getBoolean(keyFilterShowDeepSpace, true)
         val hoursAhead = preferences.getInt(keyFilterHoursAhead, 24)
         val minElevation = Double.fromBits(preferences.getLong(keyFilterMinElevation, 16.0.toRawBits()))
-        val selectedModesString = preferences.getString(keySelectedModes, null)
-        val selectedModes = selectedModesString?.split(separatorComma)?.sorted() ?: emptyList()
-        return PassesSettings(showDeepSpace, hoursAhead, minElevation, selectedModes)
+        val aosStartMinute = preferences.getInt(keyFilterAosStartMinute, 0).coerceIn(0, 23 * 60 + 59)
+        val aosEndMinute = preferences.getInt(keyFilterAosEndMinute, 23 * 60 + 59).coerceIn(0, 23 * 60 + 59)
+        val invertAosTimeWindow = preferences.getBoolean(keyFilterAosInvert, false)
+        return PassesSettings(
+            showDeepSpace,
+            hoursAhead,
+            minElevation,
+            aosStartMinute,
+            aosEndMinute,
+            invertAosTimeWindow
+        )
     }
     //endregion
 
@@ -219,25 +233,6 @@ class SettingsRepo(
     private val _databaseState = MutableStateFlow(getDatabaseState())
     override val databaseState: StateFlow<DatabaseState> = _databaseState
 
-    override fun getSatelliteTypesIds(types: List<String>): List<Int> {
-        val idsSet = mutableSetOf<Int>()
-        types.forEach { type ->
-            val typeString = preferences.getString("type$type", null)
-            val typeIds = if (typeString.isNullOrBlank()) {
-                emptyList()
-            } else {
-                typeString.split(separatorComma).map { it.toInt() }
-            }
-            idsSet.addAll(typeIds)
-        }
-        return idsSet.toList()
-    }
-
-    override fun setSatelliteTypeIds(type: String, ids: List<Int>) {
-        if (type == "All") return
-        val typesString = ids.joinToString(separatorComma)
-        preferences.edit { putString("type$type", typesString) }
-    }
 
     override fun updateDatabaseState(state: DatabaseState) = preferences.edit {
         putInt(keyNumberOfSatellites, state.numberOfSatellites)
@@ -338,8 +333,10 @@ class SettingsRepo(
                 putBoolean(keyShouldSeeWarning, new.shouldSeeWarning)
                 putBoolean(keyShouldSeeWhatsNew, new.shouldSeeWhatsNew)
                 putString(keySstvMode, new.sstvMode)
-                putString(keyMapSource, MapSource.normalize(new.mapSource))
-                putString(keyTiandituKey, new.tiandituKey)
+                putLong(keyLowElevation, new.lowElevation.toRawBits())
+                putLong(keyHighElevation, new.highElevation.toRawBits())
+                putFloat(keyRadarCompassOffset, new.radarCompassOffset)
+                putFloat(keyRadarCompassOffsetElev, new.radarCompassOffsetElev)
             }
             new
         }
@@ -355,8 +352,10 @@ class SettingsRepo(
         shouldSeeWarning = preferences.getBoolean(keyShouldSeeWarning, true),
         shouldSeeWhatsNew = preferences.getBoolean(keyShouldSeeWhatsNew, true),
         sstvMode = preferences.getString(keySstvMode, null) ?: "Auto",
-        mapSource = MapSource.normalize(preferences.getString(keyMapSource, null) ?: MapSource.TIANDITU_VECTOR),
-        tiandituKey = preferences.getString(keyTiandituKey, null) ?: ""
+        lowElevation = Double.fromBits(preferences.getLong(keyLowElevation, 15.0.toRawBits())),
+        highElevation = Double.fromBits(preferences.getLong(keyHighElevation, 45.0.toRawBits())),
+        radarCompassOffset = preferences.getFloat(keyRadarCompassOffset, 0f),
+        radarCompassOffsetElev = preferences.getFloat(keyRadarCompassOffsetElev, 0f)
     )
     //endregion
 
@@ -390,6 +389,7 @@ class SettingsRepo(
     private val keyTxRadioName = "txRadioName"
     private val keyRxRadioName = "rxRadioName"
     private val keyRadioBaudRate = "radioBaudRate"
+    private val keyRadioSplitMode = "radioSplitMode"
 
     private val _radioControlSettings = MutableStateFlow(getRadioControlSettings())
     override val radioControlSettings: StateFlow<RadioControlSettings> = _radioControlSettings
@@ -403,18 +403,42 @@ class SettingsRepo(
             putString(keyTxRadioName, settings.txRadioName)
             putString(keyRxRadioName, settings.rxRadioName)
             putInt(keyRadioBaudRate, settings.baudRate)
+            putBoolean(keyRadioSplitMode, settings.splitMode)
         }
         _radioControlSettings.value = settings
     }
 
     private fun getRadioControlSettings(): RadioControlSettings = RadioControlSettings(
         enabled = preferences.getBoolean(keyRadioControlEnabled, false),
-        radioModel = preferences.getString(keyRadioModel, null) ?: "Yaesu FT-817/818",
+        radioModel = preferences.getString(keyRadioModel, null) ?: RadioControlSettings.MODEL_YAESU_FT817,
         txRadioAddress = preferences.getString(keyTxRadioAddress, null) ?: "",
         rxRadioAddress = preferences.getString(keyRxRadioAddress, null) ?: "",
         txRadioName = preferences.getString(keyTxRadioName, null) ?: "TX Radio",
         rxRadioName = preferences.getString(keyRxRadioName, null) ?: "RX Radio",
-        baudRate = preferences.getInt(keyRadioBaudRate, 4800)
+        baudRate = preferences.getInt(keyRadioBaudRate, 4800),
+        splitMode = preferences.getBoolean(keyRadioSplitMode, false)
     )
-    //endregion
+
+    private val keySatelliteOffsets = "satelliteOffsets"
+
+    override fun getSatelliteOffset(catnum: Int): String {
+        val json = preferences.getString(keySatelliteOffsets, "{}") ?: "{}"
+        return try {
+            JSONObject(json).optString(catnum.toString(), "")
+        } catch (e: Exception) {
+            ""
+        }
+    }
+
+    override fun setSatelliteOffset(catnum: Int, offset: String) {
+        val json = preferences.getString(keySatelliteOffsets, "{}") ?: "{}"
+        val updated = try {
+            val obj = JSONObject(json)
+            if (offset.isEmpty()) obj.remove(catnum.toString()) else obj.put(catnum.toString(), offset)
+            obj.toString()
+        } catch (e: Exception) {
+            """{"$catnum": "$offset"}"""
+        }
+        preferences.edit { putString(keySatelliteOffsets, updated) }
+    }
 }

core/data/src/main/java/com/rtbishop/look4sat/core/data/source/RemoteSource.kt

@@ -24,7 +24,6 @@ import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.withContext
 import okhttp3.OkHttpClient
 import okhttp3.Request
-import java.io.ByteArrayInputStream
 import java.io.InputStream
 
 class RemoteSource(
@@ -46,13 +45,49 @@ class RemoteSource(
     override suspend fun getNetworkStream(url: String): InputStream? = withContext(dispatcher) {
         try {
             val networkRequest = Request.Builder().url(url).build()
-            httpClient.newCall(networkRequest).execute().use { response ->
-                if (!response.isSuccessful) return@withContext null
-                ByteArrayInputStream(response.body.bytes())
+            val response = httpClient.newCall(networkRequest).execute()
+            if (!response.isSuccessful) {
+                response.close()
+                return@withContext null
             }
+            // Return the body stream directly as the caller is responsible for closing it
+            // That returns the connection to OkHttp's pool
+            response.body.byteStream().buffered()
         } catch (exception: Exception) {
             println("RemoteSource network stream exception: $exception")
             null
         }
     }
+
+    override suspend fun getAmSatCatalog(): String? = withContext(dispatcher) {
+        try {
+            val request = Request.Builder()
+                .url("https://www.amsat.org/status/api/v1/catalog.php")
+                .header("User-Agent", "Look4Sat")
+                .build()
+            httpClient.newCall(request).execute().use { response ->
+                if (!response.isSuccessful) return@use null
+                response.body.string()
+            }
+        } catch (exception: Exception) {
+            println("RemoteSource getAmSatCatalog exception: $exception")
+            null
+        }
+    }
+
+    override suspend fun getAmSatReports(hours: Int, limit: Int): String? = withContext(dispatcher) {
+        try {
+            val request = Request.Builder()
+                .url("https://www.amsat.org/status/api/v1/reports.php?hours=$hours&limit=$limit")
+                .header("User-Agent", "Look4Sat")
+                .build()
+            httpClient.newCall(request).execute().use { response ->
+                if (!response.isSuccessful) return@use null
+                response.body.string()
+            }
+        } catch (exception: Exception) {
+            println("RemoteSource getAmSatReports exception: $exception")
+            null
+        }
+    }
 }

core/data/src/test/java/com/rtbishop/look4sat/core/data/framework/Ft817CatProtocolTest.kt

@@ -1,30 +1,29 @@
-package com.rtbishop.look4sat.core.data
+package com.rtbishop.look4sat.core.data.framework
 
-import com.rtbishop.look4sat.core.data.framework.Ft817CatProtocol
+import org.junit.Assert.assertArrayEquals
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
 import org.junit.Test
-import kotlin.test.assertContentEquals
-import kotlin.test.assertEquals
-import kotlin.test.assertNotNull
-import kotlin.test.assertNull
 
 class Ft817CatProtocolTest {
 
     @Test
     fun encodeFrequencyBcd_145500000() {
         val bcd = Ft817CatProtocol.encodeFrequencyBcd(145500000L)
-        assertContentEquals(byteArrayOf(0x14, 0x55, 0x00, 0x00), bcd)
+        assertArrayEquals(byteArrayOf(0x14, 0x55, 0x00, 0x00), bcd)
     }
 
     @Test
     fun encodeFrequencyBcd_435100000() {
         val bcd = Ft817CatProtocol.encodeFrequencyBcd(435100000L)
-        assertContentEquals(byteArrayOf(0x43, 0x51, 0x00, 0x00), bcd)
+        assertArrayEquals(byteArrayOf(0x43, 0x51, 0x00, 0x00), bcd)
     }
 
     @Test
     fun encodeFrequencyBcd_7074000() {
         val bcd = Ft817CatProtocol.encodeFrequencyBcd(7074000L)
-        assertContentEquals(byteArrayOf(0x00, 0x70, 0x74, 0x00), bcd)
+        assertArrayEquals(byteArrayOf(0x00, 0x70, 0x74, 0x00), bcd)
     }
 
     @Test
@@ -42,21 +41,21 @@ class Ft817CatProtocolTest {
         val cmd = Ft817CatProtocol.buildSetFreqCommand(145500000L)
         assertEquals(5, cmd.size)
         assertEquals(0x01.toByte(), cmd[4])
-        assertContentEquals(byteArrayOf(0x14, 0x55, 0x00, 0x00, 0x01), cmd)
+        assertArrayEquals(byteArrayOf(0x14, 0x55, 0x00, 0x00, 0x01), cmd)
     }
 
     @Test
     fun buildSetModeCommand_usb() {
         val cmd = Ft817CatProtocol.buildSetModeCommand("USB")
         assertNotNull(cmd)
-        assertContentEquals(byteArrayOf(0x01, 0x00, 0x00, 0x00, 0x07), cmd)
+        assertArrayEquals(byteArrayOf(0x01, 0x00, 0x00, 0x00, 0x07), cmd)
     }
 
     @Test
     fun buildSetModeCommand_fm() {
         val cmd = Ft817CatProtocol.buildSetModeCommand("FM")
         assertNotNull(cmd)
-        assertContentEquals(byteArrayOf(0x08, 0x00, 0x00, 0x00, 0x07), cmd)
+        assertArrayEquals(byteArrayOf(0x08, 0x00, 0x00, 0x00, 0x07), cmd)
     }
 
     @Test
@@ -67,19 +66,19 @@ class Ft817CatProtocolTest {
     @Test
     fun encodeCtcssTone_67_0() {
         val bcd = Ft817CatProtocol.encodeCtcssToneBcd(67.0)
-        assertContentEquals(byteArrayOf(0x06, 0x70), bcd)
+        assertArrayEquals(byteArrayOf(0x06, 0x70), bcd)
     }
 
     @Test
     fun encodeCtcssTone_74_4() {
         val bcd = Ft817CatProtocol.encodeCtcssToneBcd(74.4)
-        assertContentEquals(byteArrayOf(0x07, 0x44), bcd)
+        assertArrayEquals(byteArrayOf(0x07, 0x44), bcd)
     }
 
     @Test
     fun encodeCtcssTone_141_3() {
         val bcd = Ft817CatProtocol.encodeCtcssToneBcd(141.3)
-        assertContentEquals(byteArrayOf(0x14, 0x13), bcd)
+        assertArrayEquals(byteArrayOf(0x14, 0x13), bcd)
     }
 
     @Test
@@ -87,13 +86,13 @@ class Ft817CatProtocolTest {
         val cmd = Ft817CatProtocol.buildSetCtcssToneCommand(67.0)
         assertEquals(5, cmd.size)
         assertEquals(0x0B.toByte(), cmd[4])
-        assertContentEquals(byteArrayOf(0x06, 0x70, 0x00, 0x00, 0x0B), cmd)
+        assertArrayEquals(byteArrayOf(0x06, 0x70, 0x00, 0x00, 0x0B), cmd)
     }
 
     @Test
     fun buildCtcssModeCommand_enable() {
         val cmd = Ft817CatProtocol.buildCtcssModeCommand(true)
-        assertContentEquals(byteArrayOf(0x2A, 0x00, 0x00, 0x00, 0x0A), cmd)
+        assertArrayEquals(byteArrayOf(0x2A, 0x00, 0x00, 0x00, 0x0A), cmd)
     }
 
     @Test
@@ -108,6 +107,7 @@ class Ft817CatProtocolTest {
         val response = byteArrayOf(0x14, 0x55, 0x00, 0x00, 0x01)
         val result = Ft817CatProtocol.parseReadResponse(response)
         assertNotNull(result)
+        result ?: return
         assertEquals(145500000L, result.first)
         assertEquals("USB", result.second)
     }
@@ -117,6 +117,7 @@ class Ft817CatProtocolTest {
         val response = byteArrayOf(0x14, 0x60, 0x00, 0x00, 0x08)
         val result = Ft817CatProtocol.parseReadResponse(response)
         assertNotNull(result)
+        result ?: return
         assertEquals(146000000L, result.first)
         assertEquals("FM", result.second)
     }
@@ -135,7 +136,7 @@ class Ft817CatProtocolTest {
     @Test
     fun buildPttCommands() {
         val on = Ft817CatProtocol.buildPttOnCommand()
-        assertContentEquals(byteArrayOf(0x00, 0x00, 0x00, 0x00, 0x08), on)
+        assertArrayEquals(byteArrayOf(0x00, 0x00, 0x00, 0x00, 0x08), on)
 
         val off = Ft817CatProtocol.buildPttOffCommand()
         assertEquals(0x88.toByte(), off[4])
@@ -144,6 +145,6 @@ class Ft817CatProtocolTest {
     @Test
     fun buildReadCommand() {
         val cmd = Ft817CatProtocol.buildReadFreqModeCommand()
-        assertContentEquals(byteArrayOf(0x00, 0x00, 0x00, 0x00, 0x03), cmd)
+        assertArrayEquals(byteArrayOf(0x00, 0x00, 0x00, 0x00, 0x03), cmd)
     }
 }

core/data/src/test/java/com/rtbishop/look4sat/core/data/repository/DatabaseRepoTest.kt

@@ -0,0 +1,229 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.data.repository
+
+import com.rtbishop.look4sat.core.domain.model.DataSourcesSettings
+import com.rtbishop.look4sat.core.domain.model.DatabaseState
+import com.rtbishop.look4sat.core.domain.model.OtherSettings
+import com.rtbishop.look4sat.core.domain.model.PassesSettings
+import com.rtbishop.look4sat.core.domain.model.RCSettings
+import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
+import com.rtbishop.look4sat.core.domain.model.SatItem
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.predict.GeoPos
+import com.rtbishop.look4sat.core.domain.predict.OrbitalData
+import com.rtbishop.look4sat.core.domain.predict.OrbitalObject
+import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
+import com.rtbishop.look4sat.core.domain.source.ILocalSource
+import com.rtbishop.look4sat.core.domain.source.IRemoteSource
+import com.rtbishop.look4sat.core.domain.utility.DataParser
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.runTest
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import java.io.InputStream
+
+@OptIn(ExperimentalCoroutinesApi::class)
+class DatabaseRepoTest {
+
+    private val dispatcher = StandardTestDispatcher()
+    private val dataParser = DataParser(dispatcher)
+
+    @Test
+    fun `manual satellite import parses csv stream from content uri`() = runTest(dispatcher) {
+        val uri = "content://look4sat/import/satellites"
+        val localSource = FakeLocalSource()
+        val remoteSource = FakeRemoteSource().apply {
+            fileStreams[uri] = { validCsvStream() }
+        }
+        val settingsRepo = FakeSettingsRepo()
+        val repository = DatabaseRepo(dispatcher, dataParser, localSource, remoteSource, settingsRepo)
+
+        repository.updateTLEFromFile(uri)
+
+        assertEquals(1, localSource.insertedEntries.size)
+        assertEquals(25544, localSource.insertedEntries.first().catnum)
+        assertTrue(settingsRepo.databaseState.value.numberOfSatellites > 0)
+    }
+
+    @Test
+    fun `manual satellite import keeps tle support`() = runTest(dispatcher) {
+        val uri = "content://look4sat/import/legacy"
+        val localSource = FakeLocalSource()
+        val remoteSource = FakeRemoteSource().apply {
+            fileStreams[uri] = { validTleStream() }
+        }
+        val settingsRepo = FakeSettingsRepo()
+        val repository = DatabaseRepo(dispatcher, dataParser, localSource, remoteSource, settingsRepo)
+
+        repository.updateTLEFromFile(uri)
+
+        assertEquals(1, localSource.insertedEntries.size)
+        assertEquals(25544, localSource.insertedEntries.first().catnum)
+    }
+
+    @Test
+    fun `custom data source imports omm csv from web`() = runTest(dispatcher) {
+        val customCsvUrl = "https://example.com/custom-omm.csv"
+        val localSource = FakeLocalSource()
+        val remoteSource = FakeRemoteSource().apply {
+            networkStreams[customCsvUrl] = { validCsvStream() }
+        }
+        val settingsRepo = FakeSettingsRepo(
+            dataSources = DataSourcesSettings(
+                useCustomTLE = true,
+                useCustomTransceivers = false,
+                tleUrl = customCsvUrl,
+                transceiversUrl = ""
+            )
+        )
+        val repository = DatabaseRepo(dispatcher, dataParser, localSource, remoteSource, settingsRepo)
+
+        repository.updateFromRemote()
+
+        assertTrue(localSource.insertedEntries.any { it.catnum == 25544 })
+    }
+
+    private fun validCsvStream(): InputStream = """
+        OBJECT_NAME,OBJECT_ID,EPOCH,MEAN_MOTION,ECCENTRICITY,INCLINATION,RA_OF_ASC_NODE,ARG_OF_PERICENTER,MEAN_ANOMALY,EPHEMERIS_TYPE,CLASSIFICATION_TYPE,NORAD_CAT_ID,ELEMENT_SET_NO,REV_AT_EPOCH,BSTAR,MEAN_MOTION_DOT,MEAN_MOTION_DDOT
+        ISS (ZARYA),1998-067A,2021-11-16T12:28:09.322176,15.48582035,.0004694,51.6447,309.4881,203.6966,299.8876,0,U,25544,999,31220,.31985E-4,.1288E-4,0
+    """.trimIndent().byteInputStream()
+
+    private fun validTleStream(): InputStream = """
+        ISS (ZARYA)
+        1 25544U 98067A   21320.51955234  .00001288  00000+0  31985-4 0  9990
+        2 25544  51.6447 309.4881 0004694 203.6966 299.8876 15.48582035312205
+    """.trimIndent().byteInputStream()
+}
+
+private class FakeRemoteSource : IRemoteSource {
+    val fileStreams: MutableMap<String, () -> InputStream> = mutableMapOf()
+    val networkStreams: MutableMap<String, () -> InputStream> = mutableMapOf()
+
+    override suspend fun getFileStream(uri: String): InputStream? = fileStreams[uri]?.invoke()
+
+    override suspend fun getNetworkStream(url: String): InputStream? = networkStreams[url]?.invoke()
+}
+
+private class FakeLocalSource : ILocalSource {
+    val insertedEntries = mutableListOf<OrbitalData>()
+    private val insertedRadios = mutableListOf<SatRadio>()
+
+    override suspend fun getEntriesTotal(): Int = insertedEntries.size
+
+    override suspend fun getEntriesList(): List<SatItem> = emptyList()
+
+    override suspend fun getEntriesWithIds(ids: List<Int>): List<OrbitalObject> = emptyList()
+
+    override suspend fun insertEntries(entries: List<OrbitalData>) {
+        insertedEntries += entries
+    }
+
+    override suspend fun deleteEntries() {
+        insertedEntries.clear()
+    }
+
+    override suspend fun getIdsWithModes(modes: List<String>): List<Int> = emptyList()
+
+    override suspend fun getRadiosTotal(): Int = insertedRadios.size
+
+    override suspend fun getRadiosWithId(id: Int): List<SatRadio> = emptyList()
+
+    override suspend fun insertRadios(radios: List<SatRadio>) {
+        insertedRadios += radios
+    }
+
+    override suspend fun deleteRadios() {
+        insertedRadios.clear()
+    }
+}
+
+private class FakeSettingsRepo(dataSources: DataSourcesSettings = defaultDataSourcesSettings()) : ISettingsRepo {
+
+    override val appVersionName: String = "test"
+
+    override val selectedIds: StateFlow<List<Int>> = MutableStateFlow(emptyList())
+
+    override val selectedSatModes: StateFlow<List<String>> = MutableStateFlow(emptyList())
+
+    override val passesSettings: StateFlow<PassesSettings> = MutableStateFlow(
+        PassesSettings(hoursAhead = 24, minElevation = 0.0)
+    )
+
+    override val stationPosition: StateFlow<GeoPos> = MutableStateFlow(GeoPos(0.0, 0.0))
+
+    override val databaseState: MutableStateFlow<DatabaseState> = MutableStateFlow(DatabaseState(0, 0, 0L))
+
+    override val rcSettings: StateFlow<RCSettings> = MutableStateFlow(
+        RCSettings(false, "", "", "", false, "", "", "", false, "", "", "", false, "", "")
+    )
+
+    override val otherSettings: StateFlow<OtherSettings> = MutableStateFlow(
+        OtherSettings(false, false, false, false, false, false, false, false)
+    )
+
+    override val dataSourcesSettings: MutableStateFlow<DataSourcesSettings> = MutableStateFlow(dataSources)
+
+    override val radioControlSettings: StateFlow<RadioControlSettings> = MutableStateFlow(
+        RadioControlSettings(false, RadioControlSettings.MODEL_YAESU_FT817, "", "", "", "", 9600)
+    )
+
+    override fun setSelectedIds(ids: List<Int>) = Unit
+
+    override fun setSelectedSatModes(modes: List<String>) = Unit
+
+    override fun setPassesSettings(settings: PassesSettings) = Unit
+
+    override fun setStationPosition(latitude: Double, longitude: Double, altitude: Double): Boolean = true
+
+    override fun setStationPosition(): Boolean = true
+
+    override fun setStationPosition(locator: String): Boolean = true
+
+
+    override fun updateDatabaseState(state: DatabaseState) {
+        databaseState.value = state
+    }
+
+    override fun updateRCSettings(settings: RCSettings) = Unit
+
+    override fun updateOtherSettings(transform: (OtherSettings) -> OtherSettings) = Unit
+
+    override fun updateDataSourcesSettings(settings: DataSourcesSettings) {
+        dataSourcesSettings.value = settings
+    }
+
+    override fun updateRadioControlSettings(settings: RadioControlSettings) = Unit
+
+    override fun getSatelliteOffset(catnum: Int): String = ""
+
+    override fun setSatelliteOffset(catnum: Int, offset: String) = Unit
+}
+
+private fun defaultDataSourcesSettings(): DataSourcesSettings {
+    return DataSourcesSettings(
+        useCustomTLE = false,
+        useCustomTransceivers = false,
+        tleUrl = "",
+        transceiversUrl = ""
+    )
+}

core/data/src/test/java/com/rtbishop/look4sat/core/data/repository/SelectionRepoTest.kt

@@ -0,0 +1,177 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.data.repository
+
+import com.rtbishop.look4sat.core.domain.model.DataSourcesSettings
+import com.rtbishop.look4sat.core.domain.model.DatabaseState
+import com.rtbishop.look4sat.core.domain.model.OtherSettings
+import com.rtbishop.look4sat.core.domain.model.PassesSettings
+import com.rtbishop.look4sat.core.domain.model.RCSettings
+import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
+import com.rtbishop.look4sat.core.domain.model.SatItem
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.predict.GeoPos
+import com.rtbishop.look4sat.core.domain.predict.OrbitalObject
+import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
+import com.rtbishop.look4sat.core.domain.source.ILocalSource
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.runTest
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+@OptIn(ExperimentalCoroutinesApi::class)
+class SelectionRepoTest {
+
+    private val dispatcher = StandardTestDispatcher()
+
+    @Test
+    fun `unknown mode values do not crash and do not filter out entries`() = runTest(dispatcher) {
+        val localSource = FakeLocalSource(
+            entries = listOf(
+                SatItem(25544, "ISS (ZARYA)", false),
+                SatItem(40967, "TIANGONG", false)
+            )
+        )
+        val settingsRepo = FakeSettingsRepo(selectedModes = listOf("REMOVED_MODE"))
+        val repository = SelectionRepo(dispatcher, localSource, settingsRepo)
+
+        val flow = repository.getEntriesFlow()
+        repository.setModes(listOf("REMOVED_MODE"))
+
+        val items = flow.first()
+
+        assertEquals(listOf(25544, 40967), items.map { it.catnum })
+        assertEquals(listOf("REMOVED_MODE"), repository.getCurrentModes())
+    }
+
+    @Test
+    fun `selected satellites are shown first`() = runTest(dispatcher) {
+        val localSource = FakeLocalSource(
+            entries = listOf(
+                SatItem(44444, "Zeta", false),
+                SatItem(25544, "Alpha", false),
+                SatItem(40967, "Beta", false)
+            )
+        )
+        val settingsRepo = FakeSettingsRepo(selectedModes = emptyList())
+        val repository = SelectionRepo(dispatcher, localSource, settingsRepo)
+
+        val flow = repository.getEntriesFlow()
+        repository.setSelection(listOf(40967), true)
+
+        val items = flow.first()
+
+        assertEquals(listOf(40967, 25544, 44444), items.map { it.catnum })
+        assertEquals(listOf(true, false, false), items.map { it.isSelected })
+    }
+
+    private class FakeLocalSource(
+        private val entries: List<SatItem>
+    ) : ILocalSource {
+        override suspend fun getEntriesTotal(): Int = entries.size
+
+        override suspend fun getEntriesList(): List<SatItem> = entries
+
+        override suspend fun getEntriesWithIds(ids: List<Int>): List<OrbitalObject> = emptyList()
+
+        override suspend fun insertEntries(entries: List<com.rtbishop.look4sat.core.domain.predict.OrbitalData>) = Unit
+
+        override suspend fun deleteEntries() = Unit
+
+        override suspend fun getIdsWithModes(modes: List<String>): List<Int> = emptyList()
+
+        override suspend fun getRadiosTotal(): Int = 0
+
+        override suspend fun getRadiosWithId(id: Int): List<SatRadio> = emptyList()
+
+        override suspend fun insertRadios(radios: List<SatRadio>) = Unit
+
+        override suspend fun deleteRadios() = Unit
+    }
+
+    private class FakeSettingsRepo(
+        selectedModes: List<String>
+    ) : ISettingsRepo {
+
+        override val appVersionName: String = "test"
+
+        override val selectedIds: StateFlow<List<Int>> = MutableStateFlow(emptyList())
+
+        override val selectedSatModes: MutableStateFlow<List<String>> = MutableStateFlow(selectedModes)
+
+        override val passesSettings: StateFlow<PassesSettings> = MutableStateFlow(
+            PassesSettings(hoursAhead = 24, minElevation = 0.0)
+        )
+
+        override val stationPosition: StateFlow<GeoPos> = MutableStateFlow(GeoPos(0.0, 0.0))
+
+        override val databaseState: MutableStateFlow<DatabaseState> = MutableStateFlow(DatabaseState(0, 0, 0L))
+
+        override val rcSettings: StateFlow<RCSettings> = MutableStateFlow(
+            RCSettings(false, "", "", "", false, "", "", "", false, "", "", "", false, "", "")
+        )
+
+        override val otherSettings: StateFlow<OtherSettings> = MutableStateFlow(
+            OtherSettings(false, false, false, false, false, false, false, false)
+        )
+
+        override val dataSourcesSettings: StateFlow<DataSourcesSettings> = MutableStateFlow(
+            DataSourcesSettings(false, false, "", "")
+        )
+
+        override val radioControlSettings: StateFlow<RadioControlSettings> = MutableStateFlow(
+            RadioControlSettings(false, RadioControlSettings.MODEL_YAESU_FT817, "", "", "", "", 9600)
+        )
+
+        override fun setSelectedIds(ids: List<Int>) = Unit
+
+        override fun setSelectedSatModes(modes: List<String>) {
+            selectedSatModes.value = modes
+        }
+
+        override fun setPassesSettings(settings: PassesSettings) = Unit
+
+        override fun setStationPosition(latitude: Double, longitude: Double, altitude: Double): Boolean = true
+
+        override fun setStationPosition(): Boolean = true
+
+        override fun setStationPosition(locator: String): Boolean = true
+
+        override fun updateDatabaseState(state: DatabaseState) {
+            databaseState.value = state
+        }
+
+        override fun updateRCSettings(settings: RCSettings) = Unit
+
+        override fun updateOtherSettings(transform: (OtherSettings) -> OtherSettings) = Unit
+
+        override fun updateDataSourcesSettings(settings: DataSourcesSettings) = Unit
+
+        override fun updateRadioControlSettings(settings: RadioControlSettings) = Unit
+
+        override fun getSatelliteOffset(catnum: Int): String = ""
+
+        override fun setSatelliteOffset(catnum: Int, offset: String) = Unit
+    }
+}
+
+

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/model/SatStatus.kt

@@ -0,0 +1,37 @@
+package com.rtbishop.look4sat.core.domain.model
+
+/** One satellite status report (AMSAT site tooltip data) */
+data class SatReport(
+    val id: String,          // 报告 ID(a885153)
+    val statusText: String,  // Heard / Telemetry Only / Not Heard ...
+    val call: String,        // 呼号
+    val grid: String,        // 网格坐标(可为空)
+    val dateUtc: String,     // 2026-08-04
+    val timeUtc: String      // 2:46-:59 UTC
+)
+
+/** State of one 2-hour slot */
+data class SatSlot(
+    val statusColor: Long,   // ARGB 状态色(-1 = 无报告)
+    val count: Int,          // 报告数量(0 = 无)
+    val reportIds: List<String> = emptyList() // 该槽报告 ID 列表
+)
+
+/** One satellite day (12 two-hour slots) */
+data class SatDay(
+    val dateLabel: String,   // "Aug 4"
+    val slots: List<SatSlot> // 12 槽(00-02 ... 22-24)
+)
+
+/** One satellite, 6 days of state */
+data class SatStatus(
+    val name: String,        // "AO-123_[FM]"
+    val days: List<SatDay>   // 6 天(新→旧)
+)
+
+/** Overall page parse result */
+data class SatStatusPage(
+    val fetchedAtUtcMs: Long,
+    val statuses: List<SatStatus>,
+    val reports: Map<String, SatReport> // id → 报告
+)

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/model/Settings.kt

@@ -27,7 +27,9 @@ data class PassesSettings(
     val showDeepSpace: Boolean = true,
     val hoursAhead: Int,
     val minElevation: Double,
-    val selectedModes: List<String>
+    val aosStartMinute: Int = 0,
+    val aosEndMinute: Int = 23 * 60 + 59,
+    val invertAosTimeWindow: Boolean = false
 )
 
 data class RCSettings(
@@ -58,23 +60,12 @@ data class OtherSettings(
     val shouldSeeWarning: Boolean,
     val shouldSeeWhatsNew: Boolean,
     val sstvMode: String = "Auto",
-    val mapSource: String = MapSource.TIANDITU_VECTOR,
-    val tiandituKey: String = ""
+    val lowElevation: Double = 15.0,
+    val highElevation: Double = 45.0,
+    val radarCompassOffset: Float = 0f,
+    val radarCompassOffsetElev: Float = 0f
 )
 
-object MapSource {
-    const val OSM = "osm"
-    const val TIANDITU = "tianditu"
-    const val TIANDITU_VECTOR = "tianditu_vector"
-    const val TIANDITU_IMAGE = "tianditu_image"
-
-    fun normalize(source: String): String = when (source) {
-        TIANDITU -> TIANDITU_VECTOR
-        OSM, TIANDITU_VECTOR, TIANDITU_IMAGE -> source
-        else -> TIANDITU_VECTOR
-    }
-}
-
 data class DataSourcesSettings(
     val useCustomTLE: Boolean,
     val useCustomTransceivers: Boolean,
@@ -89,12 +80,20 @@ data class RadioControlSettings(
     val rxRadioAddress: String,
     val txRadioName: String,
     val rxRadioName: String,
-    val baudRate: Int
+    val baudRate: Int,
+    /** IC-705 only: use single-radio split-VFO mode instead of two radios. */
+    val splitMode: Boolean = false
 ) {
     companion object {
-        val SUPPORTED_RADIOS = listOf(
-            "Yaesu FT-817/818",
-            "Yaesu FT-857/897"
-        )
+        const val MODEL_YAESU_FT817   = "Yaesu FT-817/818"
+        const val MODEL_YAESU_FT857   = "Yaesu FT-857/897"
+        const val MODEL_ICOM_IC705    = "Icom IC-705"
+
+        val SUPPORTED_RADIOS = listOf(MODEL_YAESU_FT817, MODEL_YAESU_FT857, MODEL_ICOM_IC705)
+
+        /** Baud rates available for Yaesu radios. */
+        val BAUD_RATES_YAESU = listOf(4800, 9600, 38400)
+        /** Baud rates available for Icom IC-705 (higher speeds supported via CI-V USB/BT). */
+        val BAUD_RATES_ICOM  = listOf(4800, 9600, 19200, 38400, 57600, 115200)
     }
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/IAmSatRepository.kt

@@ -0,0 +1,9 @@
+package com.rtbishop.look4sat.core.domain.repository
+
+import com.rtbishop.look4sat.core.domain.model.SatStatusPage
+
+/** AMSAT satellite status data source */
+interface IAmSatRepository {
+    /** Fetch and parse the AMSAT status page; null on failure */
+    suspend fun fetchStatus(): SatStatusPage?
+}

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/IDatabaseRepo.kt

@@ -18,8 +18,8 @@
 package com.rtbishop.look4sat.core.domain.repository
 
 interface IDatabaseRepo {
-    suspend fun updateTLEFromFile(uri: String)
-    suspend fun updateTransceiversFromFile(uri: String)
+    suspend fun updateTLEFromFile(uri: String): Int
+    suspend fun updateTransceiversFromFile(uri: String): Int
     suspend fun updateFromRemote()
     suspend fun clearAllData()
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/IMainContainer.kt

@@ -29,6 +29,7 @@ interface IMainContainer {
     val selectionRepo: ISelectionRepo
     val satelliteRepo: ISatelliteRepo
     val databaseRepo: IDatabaseRepo
+    val amSatRepo: IAmSatRepository
     val radioTrackingService: IRadioTrackingService
     fun provideAddToCalendar(): IAddToCalendar
     fun provideShowToast(): IShowToast
@@ -39,6 +40,7 @@ interface IMainContainer {
     fun provideRxRadioController(): IRadioController
     fun provideAudioCapture(): IAudioCapture
     fun provideSaveImage(): ISaveImage
+    fun providePairedBluetoothDevices(): List<Pair<String, String>>
 }
 
 interface IContainerProvider {

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/IRadioController.kt

@@ -38,4 +38,51 @@ interface IRadioController {
     suspend fun pttOn(): Boolean
 
     suspend fun pttOff(): Boolean
+
+    // ── Extended operations (IC-705 / CI-V) ──────────────────────────────
+
+    /**
+     * Select the band matching [frequencyHz] via the band stacking register.
+     * Must be called before [setFrequency] and [setMode] when first tracking.
+     * Default: no-op (Yaesu radios auto-switch band via frequency).
+     */
+    suspend fun setBand(frequencyHz: Long): Boolean = false
+
+    /**
+     * Select the active VFO.
+     * @param vfoA true → VFO-A (main/RX), false → VFO-B (sub/TX in split).
+     */
+    suspend fun setVfo(vfoA: Boolean): Boolean = false
+
+    /**
+     * Enable or disable SPLIT mode (TX on sub-VFO, RX on main VFO).
+     * Default: not supported.
+     */
+    suspend fun setSplitMode(enabled: Boolean): Boolean = false
+
+    /**
+     * Set the frequency of the currently active VFO (IC-705: CMD 0x25 sub 0x00).
+     * Default: delegates to [setFrequency].
+     */
+    suspend fun setWorkingFrequency(frequencyHz: Long): Boolean = setFrequency(frequencyHz)
+
+    /**
+     * Set the frequency of the inactive/TX VFO (IC-705: CMD 0x25 sub 0x01).
+     * Sent every tracking cycle alongside [setWorkingFrequency] in split mode.
+     * Default: delegates to [setWorkingFrequency].
+     */
+    suspend fun setTxVfoFrequency(frequencyHz: Long): Boolean = setWorkingFrequency(frequencyHz)
+
+    /**
+     * Read the frequency of the currently active VFO (IC-705: CMD 0x25 sub 0x00).
+     * Default: delegates to [readFrequencyAndMode].
+     */
+    suspend fun readWorkingFrequency(): Long? = readFrequencyAndMode()?.first
+
+    /**
+     * Read the frequency of the inactive/TX VFO (IC-705: CMD 0x25 sub 0x01).
+     * Used for tuning detection in split mode.
+     * Default: delegates to [readWorkingFrequency].
+     */
+    suspend fun readTxVfoFrequency(): Long? = readWorkingFrequency()
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/ISatelliteRepo.kt

@@ -44,7 +44,15 @@ interface ISatelliteRepo {
     suspend fun initRepository()
 
     /** Recalculate passes with the given filter parameters. */
-    suspend fun calculatePasses(time: Long, hoursAhead: Int, minElevation: Double, modes: List<String>)
+    suspend fun calculatePasses(
+        time: Long,
+        hoursAhead: Int,
+        minElevation: Double,
+        aosStartMinute: Int,
+        aosEndMinute: Int,
+        invertAosTimeWindow: Boolean,
+        modes: List<String>
+    )
 
     /** Get the current position of a single satellite. */
     suspend fun getPosition(sat: OrbitalObject, pos: GeoPos, time: Long): OrbitalPos

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/ISelectionRepo.kt

@@ -21,10 +21,10 @@ import com.rtbishop.look4sat.core.domain.model.SatItem
 import kotlinx.coroutines.flow.Flow
 
 interface ISelectionRepo {
-    fun getCurrentTypes(): List<String>
-    fun getTypesList(): List<String>
+    fun getCurrentModes(): List<String>
+    fun getModesList(): List<String>
     suspend fun getEntriesFlow(): Flow<List<SatItem>>
-    suspend fun setTypes(types: List<String>)
+    suspend fun setModes(modes: List<String>)
     suspend fun setQuery(query: String)
     suspend fun setSelection(selectAll: Boolean)
     suspend fun setSelection(ids: List<Int>, isTicked: Boolean)

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/ISettingsRepo.kt

@@ -32,9 +32,9 @@ interface ISettingsRepo {
 
     //region # Satellites selection settings
     val selectedIds: StateFlow<List<Int>>
-    val selectedTypes: StateFlow<List<String>>
+    val selectedSatModes: StateFlow<List<String>>
     fun setSelectedIds(ids: List<Int>)
-    fun setSelectedTypes(types: List<String>)
+    fun setSelectedSatModes(modes: List<String>)
     //endregion
 
     //region # Passes filter settings
@@ -51,8 +51,6 @@ interface ISettingsRepo {
 
     //region # Database update settings
     val databaseState: StateFlow<DatabaseState>
-    fun getSatelliteTypesIds(types: List<String>): List<Int>
-    fun setSatelliteTypeIds(type: String, ids: List<Int>)
     fun updateDatabaseState(state: DatabaseState)
     //endregion
 
@@ -77,4 +75,9 @@ interface ISettingsRepo {
     val radioControlSettings: StateFlow<RadioControlSettings>
     fun updateRadioControlSettings(settings: RadioControlSettings)
     //endregion
+
+    //region # Per-satellite calculator offset settings
+    fun getSatelliteOffset(catnum: Int): String
+    fun setSatelliteOffset(catnum: Int, offset: String)
+    //endregion
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/source/IRemoteSource.kt

@@ -22,4 +22,6 @@ import java.io.InputStream
 interface IRemoteSource {
     suspend fun getFileStream(uri: String): InputStream?
     suspend fun getNetworkStream(url: String): InputStream?
+    suspend fun getAmSatCatalog(): String?
+    suspend fun getAmSatReports(hours: Int, limit: Int): String?
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/source/Sources.kt

@@ -19,36 +19,25 @@ package com.rtbishop.look4sat.core.domain.source
 
 object Sources {
     val satelliteDataUrls = mapOf(
-        "All" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=active&FORMAT=csv",
-        "Amateur" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=amateur&FORMAT=csv",
-        "Brightest" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=visual&FORMAT=csv",
-        "Cubesat" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=cubesat&FORMAT=csv",
-        "Education" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=education&FORMAT=csv",
-        "Engineer" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=engineering&FORMAT=csv",
-        "Geostationary" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=geo&FORMAT=csv",
-        "Globalstar" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=globalstar&FORMAT=csv",
-        "GNSS" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=gnss&FORMAT=csv",
-        "Intelsat" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=intelsat&FORMAT=csv",
-        "Iridium" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=iridium-NEXT&FORMAT=csv",
-        "Military" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=military&FORMAT=csv",
-        "New" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=last-30-days&FORMAT=csv",
-        "OneWeb" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=oneweb&FORMAT=csv",
-        "Orbcomm" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=orbcomm&FORMAT=csv",
-        "Resource" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=resource&FORMAT=csv",
-        "SatNOGS" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=satnogs&FORMAT=csv",
-        "Science" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=science&FORMAT=csv",
-        "Spire" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=spire&FORMAT=csv",
-        "Starlink" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=starlink&FORMAT=csv",
-        "Swarm" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=swarm&FORMAT=csv",
-        "Weather" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=weather&FORMAT=csv",
-        "X-Comm" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=x-comm&FORMAT=csv",
-        "Amsat" to "https://amsat.org/tle/current/nasabare.txt",
-        "Classified" to "https://www.mmccants.org/tles/classfd.zip",
-        "McCants" to "https://www.mmccants.org/tles/inttles.zip",
+        "CelesTrak" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=active&FORMAT=csv",
+        "AMSAT" to "https://amsat.org/tle/current/nasabare.txt",
+        "McCants Classified" to "https://www.mmccants.org/tles/classfd.zip",
+        "McCants Integrated" to "https://www.mmccants.org/tles/inttles.zip",
         "R4UAB" to "https://r4uab.ru/satonline.txt",
+        "SatNOGS" to "https://db.satnogs.org/api/tle/?format=3le",
+        "ARISS" to "https://live.ariss.org/iss.txt",
         "Other" to "" // key for sats filter
     )
     val transceiversDataUrls = mapOf(
         "SatNOGS" to "https://db.satnogs.org/api/transmitters/?format=json&status=active"
     )
+    val satelliteModes = listOf(
+        "4FSK", "64-QAM", "AFSK", "AFSK TUBiX10", "AHRPT", "AM", "APT", "ASK", "BPSK",
+        "BPSK PMT-A3", "CERTO", "CW", "DATV", "DBPSK", "DOKA", "DPSK", "DQPSK", "DSB", "DSTAR",
+        "DUV", "DVB-S2", "FFSK", "FM", "FMN", "FSK", "FSK AX.100 Mode 5", "FSK AX.100 Mode 6",
+        "FSK AX.25 G3RUH", "FT8", "GENESIS FSK", "GFSK", "GFSK Pkst", "GFSK Rktr", "GFSK/BPSK",
+        "GMSK", "GMSK USP", "HRPT", "LoRa", "LRPT", "LSB", "MFSK", "MSK", "MSK AX.100 Mode 5",
+        "MSK AX.100 Mode 6", "OFDM", "OQPSK", "PPM", "PSK", "PSK31", "PSK63", "QPSK", "QPSK31",
+        "QPSK63", "SIDLOC", "SQPSK", "SSDV", "SSTV", "UNKNOWN", "USB", "WSJT"
+    )
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/sstv/SstvDecoder.kt

@@ -20,39 +20,94 @@ package com.rtbishop.look4sat.core.domain.sstv
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.channels.BufferOverflow
 import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.withContext
+import kotlin.math.PI
 import kotlin.math.abs
 import kotlin.math.round
 import kotlin.math.sqrt
 
 class SstvFrame(
+    val scopePixels: IntArray?,
+    val scopeWidth: Int,
+    val scopeHeight: Int,
     val imagePixels: IntArray?,
     val imageWidth: Int,
     val imageHeight: Int,
-    val modeName: String
+    val modeName: String,
+    val imageComplete: Boolean,
+    val inputRms: Float,
+    val appliedGain: Float,
+    val syncHitRate: Float,
+    val predictedLineBursts: Int,
+    val maxPredictedStreak: Int,
+    val timingErrorSamples: Int
+)
+
+/**
+ * Decoder quality metrics for diagnostics and logging. Useful for profiling decode
+ * performance on noisy recordings.
+ */
+data class SstvQualityMetrics(
+    val syncHitRate: Float,
+    val predictedLineBursts: Int,
+    val maxPredictedStreak: Int,
+    val timingErrorSamples: Int
+)
+
+enum class LineRecoveryStrategy {
+    Look4SatLimited,
+    Robot36Compatible
+}
+
+class SstvDiagnosticsHandle internal constructor(
+    val enabled: Boolean,
+    val metrics: StateFlow<SstvQualityMetrics?>
 )
 
 class SstvDecoder(
     sampleRate: Int = 44100,
     scopeWidth: Int = 320,
     scopeHeight: Int = 256,
-    private val channelSelect: Int = 0
+    private val channelSelect: Int = 0,
+    targetRmsLevel: Float = 0.25f,
+    private val includeScopeData: Boolean = false,
+    private val enableRmsNormalization: Boolean = true,
+    preFilterCutoffHz: Double = 500.0,
+    enablePreFilter: Boolean = true,
+    private val enableDiagnosticsHandle: Boolean = false,
+    lineRecoveryStrategy: LineRecoveryStrategy = LineRecoveryStrategy.Look4SatLimited
 ) {
     private val scopeBuffer = PixelBuffer(scopeWidth, scopeHeight * 2)
     private val imageBuffer = PixelBuffer(scopeWidth, scopeHeight)
-    private val decoder = DecoderEngine(scopeBuffer, imageBuffer, "Raw", sampleRate)
+    private val decoder = DecoderEngine(scopeBuffer, imageBuffer, "Raw", sampleRate, lineRecoveryStrategy)
     private val _frames = MutableSharedFlow<SstvFrame>(
         replay = 1,
         onBufferOverflow = BufferOverflow.DROP_OLDEST
     )
+    private var lastInputRms = 0f
+    private var lastAppliedGain = 1f
+    private val _qualityMetrics = MutableStateFlow<SstvQualityMetrics?>(null)
+    private val preFilter = if (enablePreFilter) HighPassFilter(preFilterCutoffHz, sampleRate.toDouble()) else null
+    private val diagnosticsHandle = SstvDiagnosticsHandle(enableDiagnosticsHandle, _qualityMetrics)
     val frames: SharedFlow<SstvFrame> = _frames
     val supportedModes: List<String> = decoder.allModes.map { it.name }
 
     suspend fun feedSamples(samples: FloatArray) = withContext(Dispatchers.Default) {
-        // Normalize to a fixed RMS before processing so that both direct audio
-        // coupling and air-coupled microphone input decode with equal reliability.
-        normalise(samples)
+        // Optional pre-filtering: remove DC offset and subsonic noise that can mask
+        // weak signals and corrupt the RMS normalization baseline.
+        preFilter?.apply(samples)
+
+        // Optional RMS normalization: bring input to a consistent level so the
+        // FM demodulator operates in a predictable region. However, this amplifies
+        // noise proportionally. Aggressive RMS targets (e.g., 0.25) can hurt weak
+        // signals by boosting noise floor. Safer defaults: 0.35-0.50 for noisy inputs.
+        // Disable entirely for direct line-level inputs (e.g., receiver discriminator).
+        val gain = if (enableRmsNormalization) normalise(samples) else GainInfo(0f, 1f)
+        lastInputRms = gain.inputRms
+        lastAppliedGain = gain.appliedGain
         val hasNewLines = decoder.process(samples, channelSelect)
         if (hasNewLines) emitFrame()
     }
@@ -62,36 +117,134 @@ class SstvDecoder(
     fun clearPixels() {
         imageBuffer.line = -1
         imageBuffer.pixels.fill(0)
+        decoder.resetQuality()
+        if (enableDiagnosticsHandle) _qualityMetrics.value = null
+    }
+
+    fun getDiagnosticsHandle(): SstvDiagnosticsHandle? = diagnosticsHandle.takeIf { it.enabled }
+
+    /**
+     * Export quality metrics for logging/diagnostics. Useful for profiling decode
+     * performance on noisy recordings. Returns null before first frame is emitted.
+     */
+    @Suppress("unused")
+    fun getQualityMetrics(): SstvQualityMetrics? {
+        if (enableDiagnosticsHandle) return _qualityMetrics.value
+        val q = decoder.quality()
+        return SstvQualityMetrics(
+            syncHitRate = q.syncHitRate,
+            predictedLineBursts = q.predictedLineBursts,
+            maxPredictedStreak = q.maxPredictedStreak,
+            timingErrorSamples = q.timingErrorSamples
+        )
     }
 
     private fun emitFrame() {
         val imageWidth = imageBuffer.width
         val imageHeight = imageBuffer.height
+        val quality = decoder.quality()
+        if (enableDiagnosticsHandle) {
+            _qualityMetrics.value = SstvQualityMetrics(
+                syncHitRate = quality.syncHitRate,
+                predictedLineBursts = quality.predictedLineBursts,
+                maxPredictedStreak = quality.maxPredictedStreak,
+                timingErrorSamples = quality.timingErrorSamples
+            )
+        }
+        val imageComplete = imageBuffer.line >= imageHeight && imageBuffer.line > 0
         // Copy only the active image region — imageBuffer.pixels is pre-allocated
         // at the maximum possible size (PD-290: 800×616), so we must not copyOf()
         // the entire array and send padding pixels to the observer.
         val imagePixels = if (imageBuffer.line > 0) imageBuffer.pixels.copyOf(imageWidth * imageHeight) else null
         val modeName = decoder.currentMode.name
-        _frames.tryEmit(SstvFrame(imagePixels, imageWidth, imageHeight, modeName))
+        val scopePixels = if (includeScopeData) scopeBuffer.pixels.copyOf() else null
+        val scopeWidth = if (includeScopeData) scopeBuffer.width else 0
+        val scopeHeight = if (includeScopeData) scopeBuffer.height else 0
+        _frames.tryEmit(
+            SstvFrame(
+                scopePixels = scopePixels,
+                scopeWidth = scopeWidth,
+                scopeHeight = scopeHeight,
+                imagePixels = imagePixels,
+                imageWidth = imageWidth,
+                imageHeight = imageHeight,
+                modeName = modeName,
+                imageComplete = imageComplete,
+                inputRms = lastInputRms,
+                appliedGain = lastAppliedGain,
+                syncHitRate = quality.syncHitRate,
+                predictedLineBursts = quality.predictedLineBursts,
+                maxPredictedStreak = quality.maxPredictedStreak,
+                timingErrorSamples = quality.timingErrorSamples
+            )
+        )
     }
 
     // Target RMS level for the normalizer. 0.25 leaves headroom while keeping the
     // FM demodulator well above its noise floor regardless of input gain.
-    private val targetRms = 0.25f
+    // TUNING GUIDE:
+    //   - 0.20-0.25: Aggressive, best for clean direct-coupled inputs, worst for mic noise
+    //   - 0.35-0.40: Moderate, good balance for typical phone/mic inputs (RECOMMENDED)
+    //   - 0.50-0.60: Conservative, best for noisy environments, reduces amplitude resolution
+    // Disable RMS normalization entirely if using a professional receiver discriminator output.
+    private val targetRms = targetRmsLevel.coerceIn(0.05f, 0.8f)
+
+    private class GainInfo(
+        val inputRms: Float,
+        val appliedGain: Float
+    )
 
     // Bring the buffer to a fixed RMS so that microphone and direct-coupled inputs
     // both decode reliably. The guard prevents amplifying pure silence into noise.
-    private fun normalise(buffer: FloatArray) {
+    private fun normalise(buffer: FloatArray): GainInfo {
         var sumSq = 0f
         for (s in buffer) sumSq += s * s
         val rms = sqrt(sumSq / buffer.size)
         if (rms > 1e-6f) {
             val gain = targetRms / rms
             for (i in buffer.indices) buffer[i] *= gain
+            return GainInfo(rms, gain)
+        }
+        return GainInfo(rms, 1f)
+    }
+}
+
+/**
+ * Simple high-pass filter to remove DC offset and subsonic interference before RMS
+ * normalization. Improves noise floor estimation and prevents low-freq noise from
+ * corrupting the gain calculation.
+ *
+ * Design: First-order butterworth (pole at cutoff frequency). Fast, minimal latency,
+ * suitable for real-time preprocessing.
+ */
+internal class HighPassFilter(cutoffHz: Double, sampleRateHz: Double) {
+    private val alpha: Float
+    private var prevInput = 0f
+    private var prevOutput = 0f
+
+    init {
+        // First-order pole placement: alpha = wc / (wc + ws) where wc = 2*pi*fc, ws = 2*pi*fs
+        val omega = 2f * PI.toFloat() * (cutoffHz / sampleRateHz).toFloat()
+        alpha = omega / (omega + 1f)
+    }
+
+    fun apply(buffer: FloatArray) {
+        for (i in buffer.indices) {
+            val input = buffer[i]
+            prevOutput = alpha * (prevOutput + input - prevInput)
+            buffer[i] = prevOutput
+            prevInput = input
         }
     }
 }
 
+internal class DecoderQuality(
+    val syncHitRate: Float,
+    val predictedLineBursts: Int,
+    val maxPredictedStreak: Int,
+    val timingErrorSamples: Int
+)
+
 internal enum class SyncPulseWidth { FiveMs, NineMs, TwentyMs }
 
 internal class SyncPulseDetector(sampleRate: Int) {
@@ -197,7 +350,8 @@ internal class DecoderEngine(
     private val scopeBuffer: PixelBuffer,
     private val imageBuffer: PixelBuffer,
     rawName: String,
-    sampleRate: Int
+    sampleRate: Int,
+    lineRecoveryStrategy: LineRecoveryStrategy
 ) {
     private val pixelBuffer = PixelBuffer(800, 2)
     private val detector = SyncPulseDetector(sampleRate)
@@ -237,6 +391,19 @@ internal class DecoderEngine(
     private var lastSync = 0
     private var curLineSamples: Int
     private var lastOffset = 0f
+    private var syncChecks = 0
+    private var syncHits = 0
+    private var predictedLineBursts = 0
+    private var predictedStreak = 0
+    private var maxPredictedStreak = 0
+    private var timingErrorSamples = 0
+
+    // Look4Sat strategy limits synthetic lines to avoid visible vertical collapse.
+    // Robot36 strategy preserves legacy behavior by allowing unlimited synthesis.
+    private val maxConsecutivePredictedLines = when (lineRecoveryStrategy) {
+        LineRecoveryStrategy.Look4SatLimited -> 2
+        LineRecoveryStrategy.Robot36Compatible -> Int.MAX_VALUE
+    }
 
     init {
         imageBuffer.line = -1
@@ -286,6 +453,11 @@ internal class DecoderEngine(
     fun process(recordBuffer: FloatArray, channelSelect: Int): Boolean {
         var newLines = false
         val detected = detector.process(recordBuffer, channelSelect)
+        syncChecks++
+        if (detected) {
+            syncHits++
+            predictedStreak = 0
+        }
         var syncIdx = sample + detector.pulseOffset
         val channels = if (channelSelect > 0) 2 else 1
         for (j in 0 until recordBuffer.size / channels) {
@@ -308,20 +480,10 @@ internal class DecoderEngine(
                 }
             }
         } else if (handleHeader()) {
+            predictedStreak = 0
             newLines = true
         } else if (sample > lastSync + (curLineSamples * 5) / 4) {
-            copyLines(
-                currentMode.decodeScanLine(
-                    pixelBuffer,
-                    scratch,
-                    scanLineBuffer,
-                    scopeBuffer.width,
-                    lastSync,
-                    curLineSamples,
-                    lastOffset
-                )
-            )
-            lastSync += curLineSamples; newLines = true
+            newLines = decodePredictedLine()
         }
         return newLines
     }
@@ -337,6 +499,25 @@ internal class DecoderEngine(
         lockMode = false
     }
 
+    fun quality(): DecoderQuality {
+        val hitRate = if (syncChecks > 0) syncHits.toFloat() / syncChecks else 0f
+        return DecoderQuality(
+            syncHitRate = hitRate,
+            predictedLineBursts = predictedLineBursts,
+            maxPredictedStreak = maxPredictedStreak,
+            timingErrorSamples = timingErrorSamples
+        )
+    }
+
+    fun resetQuality() {
+        syncChecks = 0
+        syncHits = 0
+        predictedLineBursts = 0
+        predictedStreak = 0
+        maxPredictedStreak = 0
+        timingErrorSamples = 0
+    }
+
     private fun mean(a: IntArray): Double = a.sumOf { it.toDouble() } / a.size
     private fun stdDev(a: IntArray, m: Double): Double {
         var s = 0.0; for (v in a) s += (v - m) * (v - m); return sqrt(s / a.size)
@@ -426,6 +607,29 @@ internal class DecoderEngine(
         if (finish) drawLines(0xff000000.toInt(), 10)
     }
 
+    private fun decodePredictedLine(): Boolean {
+        // Avoid long streaks of synthetic lines; once we exceed the cap we wait for
+        // real sync to reduce visible vertical compression on weak/noisy signals.
+        if (predictedStreak >= maxConsecutivePredictedLines) return false
+        val expectedSync = lastSync + curLineSamples
+        timingErrorSamples = sample - expectedSync
+        val decoded = currentMode.decodeScanLine(
+            pixelBuffer,
+            scratch,
+            scanLineBuffer,
+            scopeBuffer.width,
+            lastSync,
+            curLineSamples,
+            lastOffset
+        )
+        copyLines(decoded)
+        lastSync = expectedSync
+        predictedLineBursts++
+        predictedStreak++
+        if (predictedStreak > maxPredictedStreak) maxPredictedStreak = predictedStreak
+        return decoded
+    }
+
     private fun drawLines(color: Int, count: Int) {
         repeat(count) {
             scopeBuffer.pixels.fill(
@@ -542,6 +746,7 @@ internal class DecoderEngine(
         lineLen: IntArray,
         latest: Int
     ): Boolean {
+        predictedStreak = 0
         for (i in 1 until syncPulses.size) syncPulses[i - 1] = syncPulses[i]
         syncPulses[syncPulses.size - 1] = latest
         for (i in 1 until lineLen.size) lineLen[i - 1] = lineLen[i]

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/utility/DataParser.kt

@@ -91,7 +91,7 @@ class DataParser(private val dispatcher: CoroutineDispatcher) {
         val line1 = tle[1]
         val line2 = tle[2]
         OrbitalData(
-            name = tle[0].trim(),
+            name = tle[0].trim().removePrefix("0 "),
             epoch = line1.substring(18, 32).toDouble(),
             meanmo = line2.substring(52, 63).toDouble(),
             eccn = line2.substring(26, 33).toDouble() / 1e7,

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/utility/DopplerFrequencyCalculator.kt

@@ -0,0 +1,141 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ */
+package com.rtbishop.look4sat.core.domain.utility
+
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
+import java.util.Locale
+
+/**
+ * Computes Doppler-corrected reciprocal frequencies for linear transponders.
+ *
+ * For a linear (passband) transponder, uplink and downlink frequencies are
+ * related by a fixed passband offset. When the satellite moves, both are
+ * Doppler-shifted. Given one, this computes the other:
+ *
+ *   downlink → uplink: mapDownlinkToUplink (passband) → getUplinkFreq (Doppler)
+ *   uplink → downlink: mapUplinkToDownlink (passband) → getDownlinkFreq (Doppler)
+ */
+object DopplerFrequencyCalculator {
+
+    /**
+     * Given a downlink frequency, compute the Doppler-corrected uplink frequency.
+     * Returns null if the transponder is not a linear passband type.
+     */
+    fun computeUplinkFromDownlink(
+        downlinkHz: Long,
+        transponder: SatRadio,
+        orbitalPos: OrbitalPos
+    ): Long? {
+        if (!isLinearTransponder(transponder)) return null
+        val baseUplink = TransponderMapper.mapDownlinkToUplink(downlinkHz, transponder) ?: return null
+        return orbitalPos.getUplinkFreq(baseUplink)
+    }
+
+    /**
+     * Given a downlink frequency, compute the Doppler-corrected uplink frequency
+     * with an offset applied to the downlink (in Hz).
+     * Returns null if the transponder is not a linear passband type.
+     *
+     * The user-entered downlink frequency already includes the offset, so subtract
+     * it before mapping the downlink passband position back to the uplink.
+     */
+    fun computeUplinkFromDownlinkWithOffset(
+        downlinkHz: Long,
+        transponder: SatRadio,
+        orbitalPos: OrbitalPos,
+        offsetHz: Long
+    ): Long? {
+        if (!isLinearTransponder(transponder)) return null
+        val baseUplink = TransponderMapper.mapDownlinkToUplink(downlinkHz - offsetHz, transponder) ?: return null
+        return orbitalPos.getUplinkFreq(baseUplink)
+    }
+
+    /**
+     * Given an uplink frequency, compute the Doppler-corrected downlink frequency.
+     * Returns null if the transponder is not a linear passband type.
+     */
+    fun computeDownlinkFromUplink(
+        uplinkHz: Long,
+        transponder: SatRadio,
+        orbitalPos: OrbitalPos
+    ): Long? {
+        if (!isLinearTransponder(transponder)) return null
+        val baseDownlink = TransponderMapper.mapUplinkToDownlink(uplinkHz, transponder) ?: return null
+        return orbitalPos.getDownlinkFreq(baseDownlink)
+    }
+
+    /**
+     * Given an uplink frequency, compute the Doppler-corrected downlink frequency
+     * with an offset applied to the downlink (in Hz).
+     * Returns null if the transponder is not a linear passband type.
+     */
+    fun computeDownlinkFromUplinkWithOffset(
+        uplinkHz: Long,
+        transponder: SatRadio,
+        orbitalPos: OrbitalPos,
+        offsetHz: Long
+    ): Long? {
+        if (!isLinearTransponder(transponder)) return null
+        val baseDownlink = TransponderMapper.mapUplinkToDownlink(uplinkHz, transponder) ?: return null
+        return orbitalPos.getDownlinkFreq(baseDownlink + offsetHz)
+    }
+
+    /** True if this transponder supports linear passband mapping. */
+    fun isLinearTransponder(transponder: SatRadio): Boolean {
+        val upLow = transponder.uplinkLow
+        val upHigh = transponder.uplinkHigh
+        val downLow = transponder.downlinkLow
+        val downHigh = transponder.downlinkHigh
+        return upLow != null && upHigh != null && downLow != null && downHigh != null
+                && upLow != upHigh && downLow != downHigh
+    }
+
+    /**
+     * True for the radio entry that should drive the standalone Calculator page.
+     *
+     * A frequency range alone is not enough: some non-user-facing or drifting data entries
+     * can also have low/high frequencies. The calculator is meant for named linear
+     * transponders, e.g. "Linear Transponder", "Linear Transp.", "SSB Transponder".
+     */
+    fun isNamedLinearTransponder(transponder: SatRadio): Boolean {
+        if (!isLinearTransponder(transponder)) return false
+
+        val info = transponder.info.lowercase(Locale.ENGLISH)
+        val modes = listOfNotNull(transponder.downlinkMode, transponder.uplinkMode)
+            .joinToString(separator = " ")
+            .lowercase(Locale.ENGLISH)
+        val hasLinearName = info.contains("linear") || info.contains(" lin") || info.startsWith("lin")
+        val hasTransponderName = info.contains("transponder") || info.contains("transp") ||
+                info.contains("xponder") || info.contains("xpdr")
+        val hasLinearMode = listOf("ssb", "usb", "lsb", "cw").any { modes.contains(it) }
+
+        return (hasLinearName && hasTransponderName) || (hasTransponderName && hasLinearMode) ||
+                (hasLinearName && hasLinearMode)
+    }
+
+    /**
+     * Removes duplicate transponder entries that describe the same physical
+     * transponder with different mode labels (e.g. SatNOGS lists AO-7's Mode A
+     * as both "Lin SSB" and "Lin CW", and JO-97's U/V transponder as both
+     * "CW Transponder" and "SSB Transponder").
+     *
+     * Entries sharing the same uplink/downlink frequency range are considered
+     * the same transponder. The non-CW entry is preferred because its invert
+     * flag is more reliable (e.g. JO-97's CW entry wrongly has invert=false).
+     */
+    fun deduplicateTransponders(radios: List<SatRadio>): List<SatRadio> {
+        return radios.groupBy { radio ->
+            listOf(radio.uplinkLow, radio.uplinkHigh, radio.downlinkLow, radio.downlinkHigh)
+        }.values.map { group ->
+            group.firstOrNull { it.downlinkMode?.equals("CW", ignoreCase = true) != true } ?: group.first()
+        }
+    }
+}

core/domain/src/test/java/com/rtbishop/look4sat/core/domain/DopplerFrequencyCalculatorTest.kt

@@ -0,0 +1,273 @@
+package com.rtbishop.look4sat.core.domain
+
+import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
+import com.rtbishop.look4sat.core.domain.utility.DopplerFrequencyCalculator
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class DopplerFrequencyCalculatorTest {
+
+    private fun linearTransponder(
+        uuid: String = "linear",
+        upLow: Long = 145_000_000L,
+        upHigh: Long = 145_500_000L,
+        downLow: Long = 435_000_000L,
+        downHigh: Long? = 435_500_000L,
+        inverted: Boolean = false,
+        info: String = "Linear Transponder",
+        downlinkMode: String? = "USB",
+        uplinkMode: String? = "LSB"
+    ) = SatRadio(
+        uuid = uuid, info = info, isAlive = true,
+        downlinkLow = downLow, downlinkHigh = downHigh,
+        downlinkMode = downlinkMode, uplinkLow = upLow, uplinkHigh = upHigh,
+        uplinkMode = uplinkMode, isInverted = inverted, catnum = 12345
+    )
+
+    private fun fmTransponder() = SatRadio(
+        uuid = "fm", info = "FM Repeater", isAlive = true,
+        downlinkLow = 435_600_000L, downlinkHigh = null,
+        downlinkMode = "FM", uplinkLow = 145_900_000L, uplinkHigh = null,
+        uplinkMode = "FM", isInverted = false, catnum = 99999
+    )
+
+    private fun pos(distanceRateKmS: Double = 0.0) = OrbitalPos().apply {
+        this.distanceRate = distanceRateKmS
+    }
+
+    @Test
+    fun isLinearTransponder_returnsTrueForLinear() {
+        assertTrue(DopplerFrequencyCalculator.isLinearTransponder(linearTransponder()))
+    }
+
+    @Test
+    fun isLinearTransponder_returnsFalseForFM() {
+        assertFalse(DopplerFrequencyCalculator.isLinearTransponder(fmTransponder()))
+    }
+
+    @Test
+    fun isLinearTransponder_returnsFalseForNullDownlinkHigh() {
+        val xpdr = linearTransponder(downHigh = null)
+        assertFalse(DopplerFrequencyCalculator.isLinearTransponder(xpdr))
+    }
+
+    @Test
+    fun isNamedLinearTransponder_returnsTrueForLinearTransponderName() {
+        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(linearTransponder()))
+    }
+
+    @Test
+    fun isNamedLinearTransponder_returnsTrueForSsbTransponderName() {
+        val xpdr = linearTransponder(info = "Mode V/U SSB Transponder", downlinkMode = "USB", uplinkMode = "LSB")
+        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(xpdr))
+    }
+
+    @Test
+    fun isNamedLinearTransponder_returnsFalseForRangeEntryWithoutTransponderName() {
+        val driftingRangeEntry = linearTransponder(info = "Upper side band (drifting)")
+        assertFalse(DopplerFrequencyCalculator.isNamedLinearTransponder(driftingRangeEntry))
+    }
+
+    @Test
+    fun isNamedLinearTransponder_returnsTrueForAbbreviatedLinName() {
+        // AO-7 style: "Mode V/A (A) Lin SSB" — "Lin" abbreviation, no "transponder" word
+        val ao7Entry = linearTransponder(info = "Mode V/A (A) Lin SSB", downlinkMode = "USB", uplinkMode = "USB")
+        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(ao7Entry))
+        val ao7CwEntry = linearTransponder(info = "Mode V/A (A) Lin CW", downlinkMode = "CW", uplinkMode = "CW")
+        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(ao7CwEntry))
+        val ao7ModeBEntry = linearTransponder(info = "Mode U/V (B) Lin", downlinkMode = "USB", uplinkMode = "LSB")
+        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(ao7ModeBEntry))
+    }
+
+    @Test
+    fun isNamedLinearTransponder_returnsTrueForLinearWithoutTransponderWord() {
+        // AO-73 style: "Mode U/V Linear" — has "Linear" but no "transponder"
+        val ao73Entry = linearTransponder(info = "Mode U/V Linear", downlinkMode = "USB", uplinkMode = "LSB")
+        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(ao73Entry))
+    }
+
+    @Test
+    fun isNamedLinearTransponder_returnsFalseForDownlinkContainingLinInsideWord() {
+        // "Downlink" contains "lin" but is not a linear-transponder name
+        val downlinkEntry = linearTransponder(info = "Mode U Downlink", downlinkMode = "FM", uplinkMode = "FM")
+        assertFalse(DopplerFrequencyCalculator.isNamedLinearTransponder(downlinkEntry))
+    }
+
+    @Test
+    fun isNamedLinearTransponder_returnsFalseForFmRepeater() {
+        assertFalse(DopplerFrequencyCalculator.isNamedLinearTransponder(fmTransponder()))
+    }
+
+    @Test
+    fun deduplicateTransponders_mergesSameFrequencyRange() {
+        // AO-7's Mode A: same range, SSB and CW entries
+        val ssb = linearTransponder(
+            uuid = "ssb-uuid", info = "Mode V/A (A) Lin SSB",
+            downlinkMode = "USB", uplinkMode = "USB"
+        )
+        val cw = linearTransponder(
+            uuid = "cw-uuid", info = "Mode V/A (A) Lin CW",
+            downlinkMode = "CW", uplinkMode = "CW"
+        )
+        val modeB = linearTransponder(
+            uuid = "modeb-uuid", info = "Mode U/V (B) Lin",
+            upLow = 432_125_000L, upHigh = 432_175_000L,
+            downLow = 145_925_000L, downHigh = 145_975_000L,
+            downlinkMode = "USB", uplinkMode = "LSB"
+        )
+        val result = DopplerFrequencyCalculator.deduplicateTransponders(listOf(ssb, cw, modeB))
+        assertEquals(2, result.size)
+        // SSB entry should be preferred over CW (same range)
+        assertEquals("ssb-uuid", result[0].uuid)
+        assertEquals("modeb-uuid", result[1].uuid)
+    }
+
+    @Test
+    fun deduplicateTransponders_prefersNonCwEntry() {
+        // JO-97: CW entry has invert=false (wrong), SSB has invert=true (correct)
+        val cw = linearTransponder(
+            uuid = "cw-uuid", info = "U/V CW Transponder",
+            downlinkMode = "CW", uplinkMode = "CW",
+            upLow = 435_100_000L, upHigh = 435_120_000L,
+            downLow = 145_855_000L, downHigh = 145_875_000L
+        )
+        val ssb = linearTransponder(
+            uuid = "ssb-uuid", info = "U/V SSB Transponder",
+            downlinkMode = "USB", uplinkMode = "LSB",
+            upLow = 435_100_000L, upHigh = 435_120_000L,
+            downLow = 145_855_000L, downHigh = 145_875_000L,
+            inverted = true
+        )
+        val result = DopplerFrequencyCalculator.deduplicateTransponders(listOf(cw, ssb))
+        assertEquals(1, result.size)
+        assertEquals("ssb-uuid", result[0].uuid)
+        // Verify the correct invert flag is preserved
+        assertTrue(result[0].isInverted)
+    }
+
+    @Test
+    fun deduplicateTransponders_preservesUniqueEntries() {
+        val t1 = linearTransponder(uuid = "t1", upLow = 145_000_000L, upHigh = 145_500_000L,
+            downLow = 435_000_000L, downHigh = 435_500_000L)
+        val t2 = linearTransponder(uuid = "t2", upLow = 435_000_000L, upHigh = 435_500_000L,
+            downLow = 145_000_000L, downHigh = 145_500_000L)
+        val result = DopplerFrequencyCalculator.deduplicateTransponders(listOf(t1, t2))
+        assertEquals(2, result.size)
+    }
+
+    @Test
+    fun computeUplinkFromDownlink_linear_noDoppler() {
+        val xpdr = linearTransponder()
+        val orbitalPos = pos(0.0)
+        val uplink = DopplerFrequencyCalculator.computeUplinkFromDownlink(435_200_000L, xpdr, orbitalPos)
+        assertNotNull(uplink)
+        assertEquals(145_200_000L, uplink)
+    }
+
+    @Test
+    fun computeDownlinkFromUplink_linear_noDoppler() {
+        val xpdr = linearTransponder()
+        val orbitalPos = pos(0.0)
+        val downlink = DopplerFrequencyCalculator.computeDownlinkFromUplink(145_200_000L, xpdr, orbitalPos)
+        assertNotNull(downlink)
+        assertEquals(435_200_000L, downlink)
+    }
+
+    @Test
+    fun computeUplinkFromDownlink_withDoppler_positiveRangeRate() {
+        // Satellite receding (positive range rate) → ground must transmit higher freq to compensate.
+        val xpdr = linearTransponder()
+        val orbitalPos = pos(7.0)
+        val uplink = DopplerFrequencyCalculator.computeUplinkFromDownlink(435_200_000L, xpdr, orbitalPos)
+        assertNotNull(uplink)
+        assertTrue(uplink!! > 145_200_000L)
+    }
+
+    @Test
+    fun computeUplinkFromDownlink_fmTransponder_returnsNull() {
+        val orbitalPos = pos()
+        val result = DopplerFrequencyCalculator.computeUplinkFromDownlink(435_600_000L, fmTransponder(), orbitalPos)
+        assertNull(result)
+    }
+
+    @Test
+    fun computeDownlinkFromUplink_fmTransponder_returnsNull() {
+        val orbitalPos = pos()
+        val result = DopplerFrequencyCalculator.computeDownlinkFromUplink(145_900_000L, fmTransponder(), orbitalPos)
+        assertNull(result)
+    }
+
+    @Test
+    fun computeDownlinkFromUplink_withPositiveOffset_addsOffsetToDownlink() {
+        val xpdr = linearTransponder()
+        val orbitalPos = pos(0.0)
+        val downlink = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+            uplinkHz = 145_200_000L,
+            transponder = xpdr,
+            orbitalPos = orbitalPos,
+            offsetHz = 2_500L
+        )
+        assertEquals(435_202_500L, downlink)
+    }
+
+    @Test
+    fun computeUplinkFromDownlink_withPositiveOffset_subtractsOffsetBeforeMapping() {
+        val xpdr = linearTransponder()
+        val orbitalPos = pos(0.0)
+        val uplink = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
+            downlinkHz = 435_202_500L,
+            transponder = xpdr,
+            orbitalPos = orbitalPos,
+            offsetHz = 2_500L
+        )
+        assertEquals(145_200_000L, uplink)
+    }
+
+    @Test
+    fun computeOffsetRoundTrip_handlesNegativeOffset() {
+        val xpdr = linearTransponder()
+        val orbitalPos = pos(0.0)
+        val downlink = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+            uplinkHz = 145_200_000L,
+            transponder = xpdr,
+            orbitalPos = orbitalPos,
+            offsetHz = -2_500L
+        )
+        assertEquals(435_197_500L, downlink)
+
+        val uplink = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
+            downlinkHz = downlink!!,
+            transponder = xpdr,
+            orbitalPos = orbitalPos,
+            offsetHz = -2_500L
+        )
+        assertEquals(145_200_000L, uplink)
+    }
+
+    @Test
+    fun computeUplinkFromDownlink_invertedTransponder() {
+        val xpdr = linearTransponder(inverted = true, downHigh = 435_500_000L)
+        val orbitalPos = pos(0.0)
+        val uplink = DopplerFrequencyCalculator.computeUplinkFromDownlink(435_200_000L, xpdr, orbitalPos)
+        assertNotNull(uplink)
+        assertEquals(145_300_000L, uplink)
+    }
+
+    @Test
+    fun computeUplinkFromDownlink_roundTrip() {
+        val xpdr = linearTransponder()
+        val orbitalPos = pos(3.5)
+        val originalDownlink = 435_250_000L
+        val uplink = DopplerFrequencyCalculator.computeUplinkFromDownlink(originalDownlink, xpdr, orbitalPos)
+        assertNotNull(uplink)
+        val roundTripDownlink = DopplerFrequencyCalculator.computeDownlinkFromUplink(uplink!!, xpdr, orbitalPos)
+        assertNotNull(roundTripDownlink)
+        val error = kotlin.math.abs(roundTripDownlink!! - originalDownlink)
+        assertTrue("Round-trip error too large: $error", error < 10000)
+    }
+}

core/presentation/src/main/java/com/rtbishop/look4sat/core/presentation/Components.kt

@@ -34,23 +34,33 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.ElevatedButton
 import androidx.compose.material3.ElevatedCard
+import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.LocalTextStyle
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
+import androidx.compose.material3.SheetValue
+import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.material3.adaptive.currentWindowAdaptiveInfo
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.compositionLocalOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.input.nestedscroll.NestedScrollConnection
+import androidx.compose.ui.input.nestedscroll.NestedScrollSource
+import androidx.compose.ui.input.nestedscroll.nestedScroll
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.hideFromAccessibility
@@ -64,10 +74,11 @@ import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextDecoration
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.TextUnit
+import androidx.compose.ui.unit.Velocity
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import androidx.compose.ui.window.Dialog
 import com.rtbishop.look4sat.core.domain.predict.NearEarthObject
 import com.rtbishop.look4sat.core.domain.predict.OrbitalData
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
@@ -134,7 +145,7 @@ fun RowScope.NextPassRow(pass: OrbitalPass, modifier: Modifier = Modifier, isUtc
         if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
     }
     val sdfTime = remember(isUtc) {
-        SimpleDateFormat("HH:mm:ss", Locale.ENGLISH).also { it.timeZone = timeZone }
+        SimpleDateFormat("HH:mm:ss", displayLocale()).also { it.timeZone = timeZone }
     }
     ElevatedCard(
         modifier = modifier
@@ -203,6 +214,11 @@ fun RowScope.NextPassRow(pass: OrbitalPass, modifier: Modifier = Modifier, isUtc
     }
 }
 
+private fun displayLocale(): Locale {
+    val locale = Locale.getDefault()
+    return if (locale.language == Locale.CHINESE.language) locale else Locale.ENGLISH
+}
+
 @Composable
 fun CardButton(onClick: () -> Unit, text: String, modifier: Modifier = Modifier) {
     ElevatedButton(
@@ -278,55 +294,92 @@ fun getDefaultPass(): OrbitalPass = OrbitalPass(
 fun SharedDialog(
     title: String, onCancel: () -> Unit, onAccept: () -> Unit, content: @Composable () -> Unit
 ) {
-    DialogShell(title = title, titleFontSize = 16, onDismissRequest = onCancel) {
+    SharedDialog(title = title, onDismissRequest = onCancel, onCancel = onCancel, onAccept = onAccept) { _ ->
         content()
-        Row(modifier = Modifier.padding(start = it, bottom = it, end = it)) {
-            CardButton(onClick = onCancel, text = stringResource(R.string.btn_cancel))
-            Spacer(modifier = Modifier.weight(1f))
-            CardButton(onClick = onAccept, text = stringResource(R.string.btn_accept))
-        }
     }
 }
 
 @Composable
-fun InfoDialog(title: String, text: String, onDismiss: () -> Unit) {
-    DialogShell(title = title, titleFontSize = 18, onDismissRequest = {}) {
-        Text(
-            text = text,
-            fontSize = 16.sp,
-            color = MaterialTheme.colorScheme.onSurface,
-            modifier = Modifier.padding(horizontal = it)
-        )
-        Row(modifier = Modifier.padding(start = it, bottom = it, end = it)) {
-            Spacer(modifier = Modifier.weight(1f))
-            CardButton(onClick = onDismiss, text = stringResource(R.string.btn_accept))
+fun SharedDialog(
+    title: String,
+    onDismissRequest: () -> Unit,
+    onCancel: (() -> Unit)? = null,
+    onAccept: (() -> Unit)? = null,
+    titleFontSize: Int = 16,
+    titleTextAlign: TextAlign = if (onCancel != null && onAccept != null) TextAlign.Center else TextAlign.Start,
+    content: @Composable (padding: Dp) -> Unit
+) {
+    val dismissible = onCancel != null
+    DialogShell(onDismissRequest = onDismissRequest, dismissible = dismissible) { padding ->
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(start = padding, top = padding, end = padding)
+        ) {
+            if (onCancel != null) {
+                CardButton(onClick = onCancel, text = stringResource(R.string.btn_cancel))
+            }
+            Text(
+                text = title,
+                fontSize = titleFontSize.sp,
+                fontWeight = FontWeight.Medium,
+                color = MaterialTheme.colorScheme.primary,
+                textAlign = titleTextAlign,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis,
+                modifier = Modifier
+                    .weight(1f)
+                    .padding(horizontal = if (onCancel != null && onAccept != null) padding else 0.dp)
+            )
+            if (onAccept != null) {
+                CardButton(onClick = onAccept, text = stringResource(R.string.btn_accept))
+            }
         }
+        content(padding)
     }
 }
 
+@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 private fun DialogShell(
-    title: String,
-    titleFontSize: Int,
     onDismissRequest: () -> Unit,
-    content: @Composable (padding: androidx.compose.ui.unit.Dp) -> Unit
+    dismissible: Boolean = true,
+    content: @Composable (padding: Dp) -> Unit
 ) {
     val padding = LocalSpacing.current.large
-    Dialog(onDismissRequest = onDismissRequest) {
-        ElevatedCard {
-            Column(
-                horizontalAlignment = Alignment.CenterHorizontally,
-                verticalArrangement = Arrangement.spacedBy(padding)
-            ) {
-                Text(
-                    text = title,
-                    fontSize = titleFontSize.sp,
-                    fontWeight = FontWeight.Medium,
-                    color = MaterialTheme.colorScheme.primary,
-                    modifier = Modifier.padding(start = padding, top = padding, end = padding)
-                )
-                content(padding)
+    val sheetState = rememberModalBottomSheetState(
+        skipPartiallyExpanded = true,
+        confirmValueChange = { if (dismissible) true else it != SheetValue.Hidden }
+    )
+    val stopSheetFling = remember {
+        object : NestedScrollConnection {
+            override suspend fun onPostFling(consumed: Velocity, available: Velocity): Velocity {
+                return available
             }
+
+            override fun onPostScroll(
+                consumed: Offset,
+                available: Offset,
+                source: NestedScrollSource
+            ): Offset = Offset.Zero
+        }
+    }
+    ModalBottomSheet(
+        onDismissRequest = if (dismissible) onDismissRequest else { {} },
+        sheetState = sheetState,
+        dragHandle = null,
+        shape = RoundedCornerShape(topStart = 24.dp, topEnd = 24.dp),
+        scrimColor = Color.Black.copy(alpha = 0.64f)
+    ) {
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.spacedBy(padding),
+            modifier = Modifier
+                .fillMaxWidth()
+                .nestedScroll(stopSheetFling)
+        ) {
+            content(padding)
         }
     }
 }
@@ -391,13 +444,26 @@ fun TopBar(
 
 @Composable
 fun elevationColor(elevation: Double): Color {
+    val thresholds = LocalElevationThresholds.current
     return when {
-        elevation < 15.0 -> Color(0xFFEF5350) // soft red for low elevation
-        elevation < 45.0 -> MaterialTheme.colorScheme.primary // accent yellow for normal
-        else -> Color(0xFF66BB6A) // soft green for high elevation
+        elevation < thresholds.low -> ElevationLowColor // soft red for low elevation
+        elevation < thresholds.high -> MaterialTheme.colorScheme.primary // accent yellow for normal
+        else -> ElevationHighColor // soft green for high elevation
     }
 }
 
+/** User-configurable elevation highlight thresholds (in degrees). */
+data class ElevationThresholds(val low: Double = 15.0, val high: Double = 45.0)
+
+/** Provided at the app root from settings; defaults keep the original 15°/45° behavior. */
+val LocalElevationThresholds = compositionLocalOf { ElevationThresholds() }
+
+/** Soft red used for elevations below the low threshold. */
+val ElevationLowColor = Color(0xFFEF5350)
+
+/** Soft green used for elevations above the high threshold. */
+val ElevationHighColor = Color(0xFF66BB6A)
+
 @Composable
 fun OutlinedText(
     text: String,

core/presentation/src/main/java/com/rtbishop/look4sat/core/presentation/MainTheme.kt

@@ -79,6 +79,10 @@ private val lightScheme = lightColorScheme(
     onSecondary = Color(0xFFFFFFFF),
     secondaryContainer = Color(0xFFF1E1BB),
     onSecondaryContainer = Color(0xFF221B04),
+    tertiary = Color(0xFF3C6FE0), // AMSAT Active (darker for light theme)
+    onTertiary = Color(0xFFFFFFFF),
+    tertiaryContainer = Color(0xFFE09800), // AMSAT Telemetry (darker)
+    onTertiaryContainer = Color(0xFF000000),
     background = Color(0xFFFFF8F0),
     onBackground = Color(0xFF1E1B13),
     surface = Color(0xFFFFF8F0),
@@ -101,10 +105,10 @@ private val darkScheme = darkColorScheme(
     onSecondary = Color(0xFF000000),
     secondaryContainer = Color(0xFF404040), // navBar indicator,
     onSecondaryContainer = Color(0xFFE0E0E0), // navBar active icon
-//    tertiary = Color(0xFF121212),
-//    onTertiary = Color(0xFF121212),
-//    tertiaryContainer = Color(0xFF121212),
-//    onTertiaryContainer = Color(0xFF121212),
+    tertiary = Color(0xFF648FFF), // AMSAT Active (from amsat.org/status)
+    onTertiary = Color(0xFF000000),
+    tertiaryContainer = Color(0xFFFFB000), // AMSAT Telemetry
+    onTertiaryContainer = Color(0xFF000000),
     background = Color(0xFF121212),
     onBackground = Color(0xFFE0E0E0),
     surface = Color(0xFF202020), // card background

core/presentation/src/main/res/drawable/ic_like.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="15"
+    android:viewportHeight="15">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M13.91,6.75c-1.17,2.25 -4.3,5.31 -6.07,6.94c-0.19,0.172 -0.48,0.172 -0.67,0C5.39,12.06 2.26,9 1.09,6.75C-1.48,1.8 5,-1.5 7.5,3.45C10,-1.5 16.48,1.8 13.91,6.75z" />
+</vector>

core/presentation/src/main/res/drawable/ic_pound.xml

@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-    <path
-        android:fillColor="@android:color/white"
-        android:pathData="M14,21c1.93,0 3.62,-1.17 4,-3l-1.75,-0.88C16,18.21 15.33,19 14,19l-4.9,0c0.83,-1 1.5,-2.34 1.5,-4c0,-0.35 -0.03,-0.69 -0.08,-1L14,14v-2l-4.18,0C9,10.42 8,9.6 8,8c0,-1.93 1.57,-3.5 3.5,-3.5c1.5,0 2.79,0.95 3.28,2.28L16.63,6c-0.8,-2.05 -2.79,-3.5 -5.13,-3.5C8.46,2.5 6,4.96 6,8c0,1.78 0.79,2.9 1.49,4L6,12v2l2.47,0c0.08,0.31 0.13,0.64 0.13,1c0,2.7 -2.6,4 -2.6,4v2H14z" />
-</vector>

core/presentation/src/main/res/drawable/ic_tags.xml

@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="960"
-    android:viewportHeight="960">
-    <path
-        android:fillColor="@android:color/white"
-        android:pathData="M240,800L280,640L120,640L140,560L300,560L340,400L180,400L200,320L360,320L400,160L480,160L440,320L600,320L640,160L720,160L680,320L840,320L820,400L660,400L620,560L780,560L760,640L600,640L560,800L480,800L520,640L360,640L320,800L240,800ZM380,560L540,560L580,400L420,400L380,560Z" />
-</vector>

core/presentation/src/main/res/values-es/strings.xml

@@ -13,12 +13,16 @@
     <string name="nav_prefs">Ajustes</string>
 
     <!-- Satellites screen -->
-    <string name="sat_type_hint">Tipo: %s</string>
-    <string name="sat_type_title">Seleccionar tipo de satélite</string>
+    <string name="sat_type_hint">Modos: %s</string>
+    <string name="sat_type_title">Seleccionar modos</string>
     <string name="sat_search_hint">Id - Nombre</string>
     <string name="sat_search_clear">Vaciar</string>
     <string name="sat_clear_all">Vaciar todo</string>
     <string name="sat_select_all">Seleccionar todo</string>
+    <string name="sat_group_selected">Seleccionados</string>
+    <string name="sat_group_available">Disponibles</string>
+    <string name="sat_group_selected_count">Seleccionados (%1$d)</string>
+    <string name="sat_group_available_count">Disponibles (%1$d)</string>
     <string name="sat_empty_list_message">
         Asegúrese de que su consulta de búsqueda sea correcta y que la base de datos esté actualizada</string>
     <string name="sat_warning_title">Alarma\!</string>
@@ -26,19 +30,22 @@
         Esta aplicación incluye más de 9000 satélites.
         No tiene sentido rastrearlos todos a la vez.
         \n\nIntenta siempre limitar la lista a los que te
-        interesen mediante la búsqueda y el selector de tipos.</string>
+        interesen mediante la búsqueda y el selector de modos.</string>
 
     <!-- Passes screen -->
     <string name="pass_filter_title">Filtrar pases</string>
     <string name="pass_filter_elev">Elevación mínima</string>
-    <string name="pass_filter_hours">Horas por delante</string>
-    <string name="pass_modes_title">Tipo de modulación</string>
+    <string name="pass_filter_hours">Tiempo por delante</string>
+    <string name="pass_filter_aos_time">Ventana AOS</string>
+    <string name="pass_filter_invert_time">Invertir ventana AOS</string>
+    <string name="pass_filter_deep_space">DeepSpace (período &gt;225min)</string>
+    <string name="pass_modes_title">Seleccionar modos</string>
     <string name="pass_elevation">Elevación: %.1f°</string>
     <string name="pass_altitude">Altitud: %.0f km</string>
     <string name="pass_empty_list_message">
         Asegúrate de que tus filtros sean correctos y hayas seleccionado satélites</string>
     <string name="pass_error_message">No hay pases de satélite próximos para mostrar</string>
-    <string name="pass_welcome_title">Bienvenido a Look4Sat-CNMap\!</string>
+    <string name="pass_welcome_title">Bienvenido a Look4Sat\!</string>
     <string name="pass_welcome_message">
         Asegúrate de configurar tu posición mediante GPS, Latitud/Longitud o QTH en Configuración.
         \n\nActualiza la base de datos al menos una vez por semana para obtener predicciones precisas.</string>
@@ -93,11 +100,11 @@
     <string name="prefs_loc_qth_title">QTH</string>
     <string name="prefs_loc_qth_error">Ubicación QTH no válida</string>
     <string name="prefs_loc_success">Ubicación actualizada con éxito</string>
-    <string name="prefs_station_title">Ajustar ubicaicón de la estación</string>
-    <string name="prefs_station_lat_text">Latitud de tu estación terrestre</string>
-    <string name="prefs_station_lon_text">Longitud de tu estación terrestre</string>
-    <string name="prefs_locator_title">Ajustes ubicación QTH</string>
-    <string name="prefs_locator_text">Ajustar posición de la estación con tu ubicación</string>
+    <string name="prefs_station_title">Ubicación de la estación</string>
+    <string name="prefs_station_lat_text">Latitud de estación</string>
+    <string name="prefs_station_lon_text">Longitud de estación</string>
+    <string name="prefs_locator_title">Localizador QTH</string>
+    <string name="prefs_locator_text">Posición por localizador</string>
 
     <string name="prefs_data_title">Datos satelitales</string>
     <string name="prefs_data_entries">Satélites: %s</string>
@@ -107,38 +114,57 @@
     <string name="prefs_data_clear">Vaciar</string>
     <string name="prefs_data_clear_success">Datos eliminados con éxito</string>
     <string name="prefs_data_update_success">Actualización completada con éxito</string>
+    <string name="prefs_data_import_satellites_error">No se importaron satélites. Usa un TLE/3LE (.txt) u OMM (.csv) válido.</string>
+    <string name="prefs_data_import_transceivers_error">No se importaron transceptores. Usa un SatNOGS (.json) válido.</string>
 
-    <string name="prefs_data_sources_title">Custom data sources</string>
-    <string name="prefs_data_sources_tle_switch">Custom TLE URL</string>
-    <string name="prefs_data_sources_transceivers_switch">Custom transceivers URL</string>
+    <string name="prefs_data_sources_title">Fuentes personalizadas</string>
+    <string name="prefs_data_sources_tle_switch">URL TLE</string>
+    <string name="prefs_data_sources_transceivers_switch">URL transceptores</string>
+    <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>
 
-    <string name="prefs_data_output_title">Data output</string>
-    <string name="prefs_net_output">Network</string>
+    <string name="prefs_data_output_title">Salida de datos</string>
+    <string name="prefs_net_output">Red</string>
     <string name="prefs_bt_output">Bluetooth</string>
+    <string name="prefs_cat_output">CAT</string>
 
-    <string name="prefs_net_title">Salida de datos de red</string>
-    <string name="prefs_net_rotator_switch">Enable rotation output</string>
+    <string name="nav_radiocontrol">Control de radio</string>
+    <string name="rc_settings_title">Control CAT</string>
+    <string name="rc_radio_model">Modelo de radio</string>
+    <string name="rc_tx_device_hint">Dirección BT TX</string>
+    <string name="rc_rx_device_hint">Dirección BT RX</string>
+    <string name="rc_tx_name_hint">Nombre radio TX</string>
+    <string name="rc_rx_name_hint">Nombre radio RX</string>
+    <string name="rc_enable_switch">Activar CAT</string>
+
+    <string name="prefs_net_title">Salida de red</string>
+    <string name="prefs_net_rotator_switch">Activar salida de rotación</string>
     <string name="prefs_net_rotator_address_hint">IP:Puerto</string>
     <string name="prefs_net_rotator_format_hint">Formato de datos</string>
-    <string name="prefs_net_frequency_switch">Enable frequency output</string>
+    <string name="prefs_net_frequency_switch">Activar salida de frecuencia</string>
     <string name="prefs_net_frequency_address_hint">IP:Puerto</string>
     <string name="prefs_net_frequency_format_hint">Formato de datos</string>
 
-    <string name="prefs_bt_title">Salida por Bluetooth</string>
-    <string name="prefs_bt_rotator_switch">Enable rotation output</string>
-    <string name="prefs_bt_rotator_device_hint">Id dispositivo</string>
-    <string name="prefs_bt_rotator_output_hint">Formato de datos</string>
-    <string name="prefs_bt_frequency_switch">Enable frequency output</string>
-    <string name="prefs_bt_frequency_device_hint">Id dispositivo</string>
-    <string name="prefs_bt_frequency_output_hint">Formato de datos</string>
+    <string name="prefs_bt_title">Salida Bluetooth</string>
+    <string name="prefs_bt_rotator_switch">Activar salida de rotación</string>
+    <string name="prefs_bt_rotator_device_hint">ID dispositivo</string>
+    <string name="prefs_bt_rotator_output_hint">Formato</string>
+    <string name="prefs_bt_frequency_switch">Activar salida de frecuencia</string>
+    <string name="prefs_bt_frequency_device_hint">ID dispositivo</string>
+    <string name="prefs_bt_frequency_output_hint">Formato</string>
     <string name="prefs_bt_perm_error">Revisa los permisos de Bluetooth</string>
     <string name="prefs_net_perm_error">Revisa los permisos de red</string>
 
-    <string name="prefs_other_title">Otros ajustes</string>
-    <string name="prefs_other_switch_utc">Mostrar tiempos de pase en UTC</string>
-    <string name="prefs_other_switch_update">Habilitar auto actualización de datos</string>
-    <string name="prefs_other_switch_sweep">Habilitar animaciones radar</string>
-    <string name="prefs_other_switch_sensors">Usar sensores para rotar vista de radar</string>
+    <string name="prefs_other_title">Otros</string>
+    <string name="prefs_other_switch_utc">Hora UTC</string>
+    <string name="prefs_other_switch_update">Actualización automática</string>
+    <string name="prefs_other_switch_sweep">Animación radar</string>
+    <string name="prefs_other_switch_sensors">Sensores</string>
+    <string name="prefs_other_switch_night_mode">Filtro nocturno</string>
+
+    <string name="prefs_highlight_title">Resaltado de elevación</string>
+    <string name="prefs_highlight_low">Baja &lt; %1$d°</string>
+    <string name="prefs_highlight_mid">Media %1$d-%2$d°</string>
+    <string name="prefs_highlight_high">Alta &gt; %1$d°</string>
 
     <string name="prefs_outro_title">Me gustaría dar las gracias a:</string>
     <string name="prefs_outro_license">La app viene sin garantías de ningún tipo.</string>

core/presentation/src/main/res/values-ru/strings.xml

@@ -13,31 +13,38 @@
     <string name="nav_prefs">Настройки</string>
 
     <!-- Satellites screen -->
-    <string name="sat_type_hint">Тип: %s</string>
-    <string name="sat_type_title">Выберите тип спутника</string>
+    <string name="sat_type_hint">Режимы: %s</string>
+    <string name="sat_type_title">Выберите режимы</string>
     <string name="sat_search_hint">Id - Название</string>
     <string name="sat_search_clear">Очистить</string>
     <string name="sat_clear_all">Очистить</string>
     <string name="sat_select_all">Выбрать</string>
+    <string name="sat_group_selected">Выбранные</string>
+    <string name="sat_group_available">Доступные</string>
+    <string name="sat_group_selected_count">Выбранные (%1$d)</string>
+    <string name="sat_group_available_count">Доступные (%1$d)</string>
     <string name="sat_empty_list_message">Убедитесь, что ваш поисковый запрос верен и база данных обновлена</string>
     <string name="sat_warning_title">Внимание\!</string>
     <string name="sat_warning_message">
         В этом приложении перечислено более 9000 спутников.
         Отслеживать их все одновременно бессмысленно.
         \n\nВсегда старайтесь сузить список до тех,
-        которые вас интересуют, используя поиск и селектор типов.</string>
+        которые вас интересуют, используя поиск и выбор режимов.</string>
 
     <!-- Passes screen -->
     <string name="pass_filter_title">Фильтровать пролеты</string>
     <string name="pass_filter_elev">Минимальная элевация</string>
-    <string name="pass_filter_hours">Количество часов</string>
-    <string name="pass_modes_title">Выберите тип модуляции</string>
+    <string name="pass_filter_hours">Период расчёта</string>
+    <string name="pass_filter_aos_time">Окно AOS</string>
+    <string name="pass_filter_invert_time">Инвертировать окно AOS</string>
+    <string name="pass_filter_deep_space">DeepSpace (период &gt;225мин)</string>
+    <string name="pass_modes_title">Выберите режимы</string>
     <string name="pass_elevation">Элевация: %.1f°</string>
     <string name="pass_altitude">Высота: %d км</string>
     <string name="pass_empty_list_message">
         Убедитесь, что ваши фильтры настроены правильно и вы выбрали спутники</string>
     <string name="pass_error_message">Нет предстоящих пролётов спутников</string>
-    <string name="pass_welcome_title">Добро пожаловать в Look4Sat-CNMap\!</string>
+    <string name="pass_welcome_title">Добро пожаловать в Look4Sat\!</string>
     <string name="pass_welcome_message">
         Обязательно укажите свое местоположение по GPS, широте/долготе или QTH в настройках.
         \n\nПожалуйста, обновляйте базу данных как минимум раз в неделю, чтобы получать точные прогнозы.</string>
@@ -92,11 +99,11 @@
     <string name="prefs_loc_qth_title">QTH</string>
     <string name="prefs_loc_qth_error">Неправильный локатор QTH</string>
     <string name="prefs_loc_success">Позиция успешно обновлена</string>
-    <string name="prefs_station_title">Настройки местоположения</string>
-    <string name="prefs_station_lat_text">Введите широту наземной станции</string>
-    <string name="prefs_station_lon_text">Введите долготу наземной станции</string>
-    <string name="prefs_locator_title">Настройки локатора QTH</string>
-    <string name="prefs_locator_text">Введите позицию через локатор</string>
+    <string name="prefs_station_title">Положение станции</string>
+    <string name="prefs_station_lat_text">Широта станции</string>
+    <string name="prefs_station_lon_text">Долгота станции</string>
+    <string name="prefs_locator_title">Локатор QTH</string>
+    <string name="prefs_locator_text">Позиция по локатору</string>
 
     <string name="prefs_data_title">Данные спутников</string>
     <string name="prefs_data_entries">Спутников: %s</string>
@@ -106,16 +113,30 @@
     <string name="prefs_data_clear">Очистить</string>
     <string name="prefs_data_clear_success">Очистка прошла успешно</string>
     <string name="prefs_data_update_success">Обновление прошло успешно</string>
+    <string name="prefs_data_import_satellites_error">Спутники не импортированы. Нужен TLE/3LE (.txt) или OMM (.csv).</string>
+    <string name="prefs_data_import_transceivers_error">Трансиверы не импортированы. Нужен SatNOGS (.json).</string>
 
-    <string name="prefs_data_sources_title">Свои источники данных</string>
-    <string name="prefs_data_sources_tle_switch">Custom TLE URL</string>
-    <string name="prefs_data_sources_transceivers_switch">Custom Transceivers URL</string>
+    <string name="prefs_data_sources_title">Свои источники</string>
+    <string name="prefs_data_sources_tle_switch">URL TLE</string>
+    <string name="prefs_data_sources_transceivers_switch">URL трансиверов</string>
+    <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>
 
-    <string name="prefs_data_output_title">Вывод данных</string>
+    <string name="prefs_data_output_title">Вывод</string>
     <string name="prefs_net_output">Сеть</string>
     <string name="prefs_bt_output">Bluetooth</string>
+    <string name="prefs_cat_output">CAT</string>
 
-    <string name="prefs_net_title">Вывод сетевых данных</string>
+    <string name="nav_radiocontrol">Управление радио</string>
+
+    <string name="rc_settings_title">CAT управление</string>
+    <string name="rc_radio_model">Модель радио</string>
+    <string name="rc_tx_device_hint">BT адрес TX</string>
+    <string name="rc_rx_device_hint">BT адрес RX</string>
+    <string name="rc_tx_name_hint">Имя радио TX</string>
+    <string name="rc_rx_name_hint">Имя радио RX</string>
+    <string name="rc_enable_switch">Включить CAT</string>
+
+    <string name="prefs_net_title">Сетевой вывод</string>
     <string name="prefs_net_rotator_switch">Включить вывод ротатора</string>
     <string name="prefs_net_rotator_address_hint">IP:Порт</string>
     <string name="prefs_net_rotator_format_hint">Формат</string>
@@ -123,21 +144,27 @@
     <string name="prefs_net_frequency_address_hint">IP:Порт</string>
     <string name="prefs_net_frequency_format_hint">Формат</string>
 
-    <string name="prefs_bt_title">Вывод данных Bluetooth</string>
+    <string name="prefs_bt_title">Вывод Bluetooth</string>
     <string name="prefs_bt_rotator_switch">Включить вывод ротатора</string>
-    <string name="prefs_bt_rotator_device_hint">Id устройства</string>
+    <string name="prefs_bt_rotator_device_hint">ID устройства</string>
     <string name="prefs_bt_rotator_output_hint">Формат</string>
     <string name="prefs_bt_frequency_switch">Включить вывод частоты</string>
-    <string name="prefs_bt_frequency_device_hint">Id устройства</string>
+    <string name="prefs_bt_frequency_device_hint">ID устройства</string>
     <string name="prefs_bt_frequency_output_hint">Формат</string>
     <string name="prefs_bt_perm_error">Нет разрешения использовать bluetooth</string>
     <string name="prefs_net_perm_error">Нет разрешения использовать сеть</string>
 
-    <string name="prefs_other_title">Другие настройки</string>
-    <string name="prefs_other_switch_utc">Показывать время по UTC</string>
-    <string name="prefs_other_switch_update">Обновлять данные автоматически</string>
-    <string name="prefs_other_switch_sweep">Показывать анимацию радара</string>
-    <string name="prefs_other_switch_sensors">Использовать сенсоры устройства</string>
+    <string name="prefs_other_title">Прочее</string>
+    <string name="prefs_other_switch_utc">Время в UTC</string>
+    <string name="prefs_other_switch_update">Автообновление данных</string>
+    <string name="prefs_other_switch_sweep">Анимация радара</string>
+    <string name="prefs_other_switch_sensors">Сенсоры</string>
+    <string name="prefs_other_switch_night_mode">Ночной фильтр</string>
+
+    <string name="prefs_highlight_title">Подсветка высоты</string>
+    <string name="prefs_highlight_low">Низко &lt; %1$d°</string>
+    <string name="prefs_highlight_mid">Средне %1$d-%2$d°</string>
+    <string name="prefs_highlight_high">Высоко &gt; %1$d°</string>
 
     <string name="prefs_outro_title">Я хотел бы сказать спасибо:</string>
     <string name="prefs_outro_license">Это ПО поставляется без гарантий.</string>

core/presentation/src/main/res/values-si/strings.xml

@@ -13,32 +13,39 @@
     <string name="nav_prefs">පසුතල</string>
 
     <!-- Satellites screen -->
-    <string name="sat_type_hint">වර්ගය: %s</string>
-    <string name="sat_type_title">චන්ද්‍රිකා ආකාරය තෝරන්න</string>
+    <string name="sat_type_hint">මාදිලි: %s</string>
+    <string name="sat_type_title">මාදිලි තෝරන්න</string>
     <string name="sat_search_hint">Id - නම</string>
     <string name="sat_search_clear">පිරිසිදු ක°</string>
     <string name="sat_clear_all">සියල්ල පිරිසිදු ක°</string>
     <string name="sat_select_all">සියල්ල තෝරන්න</string>
+    <string name="sat_group_selected">තෝරාගත්</string>
+    <string name="sat_group_available">තිබෙන</string>
+    <string name="sat_group_selected_count">තෝරාගත් (%1$d)</string>
+    <string name="sat_group_available_count">තිබෙන (%1$d)</string>
     <string name="sat_empty_list_message">
         ඔබගේ සෙවුම් විමසුම නිවැරදි බවත් දත්ත සමුදාය යාවත්කාලීන කර ඇති බවත් සහතික කර ගන්න</string>
     <string name="sat_warning_title">අවවාදයයි\!</string>
     <string name="sat_warning_message">
         මෙම යෙදුමේ ලැයිස්තුගත කර ඇති චන්ද්‍රිකා 9000 කට වඩා තිබේ.
         ඒවා සියල්ලම එකවර නිරීක්ෂණය කිරීම තේරුමක් නැති දෙයක්.
-        \n\nසෙවීම සහ වර්ග තේරීම හරහා ඔබ උනන්දුවක් දක්වන
+        \n\nසෙවීම සහ මාදිලි තේරීම හරහා ඔබ උනන්දුවක් දක්වන
         ඒවාට පමණක් ලැයිස්තුව පටු කිරීමට සැමවිටම උත්සාහ කරන්න.</string>
 
     <!-- Passes screen -->
     <string name="pass_filter_title">පසුකිරිම් පිරිපහදුව</string>
     <string name="pass_filter_elev">අවම උත්තෝලනය</string>
-    <string name="pass_filter_hours">ඉදිරි පැය</string>
-    <string name="pass_modes_title">මූර්ජන ආකාරය තෝරන්න</string>
+    <string name="pass_filter_hours">ඉදිරි කාලය</string>
+    <string name="pass_filter_aos_time">AOS කවුළුව</string>
+    <string name="pass_filter_invert_time">AOS කවුළුව ප්‍රතිවිරුද්ධ කරන්න</string>
+    <string name="pass_filter_deep_space">DeepSpace (කාලය &gt;225min)</string>
+    <string name="pass_modes_title">මූර්ජන තෝරන්න</string>
     <string name="pass_elevation">උත්තෝලනය: %.1f°</string>
     <string name="pass_altitude">උන්නතාශය: %d km</string>
     <string name="pass_empty_list_message">
         ඔබගේ පෙරහන් නිවැරදි බවත් ඔබ චන්ද්‍රිකා තෝරාගෙන ඇති බවත් සහතික කර ගන්න</string>
     <string name="pass_error_message">ප්‍රදර්ශනය කිරීමට ඉදිරියට එන චන්ද්‍රිකා පසුකර යෑම් නැත.</string>
-    <string name="pass_welcome_title">Look4Sat-CNMap වෙත සාදරයෙන් පිළිගනිමු\!</string>
+    <string name="pass_welcome_title">Look4Sat වෙත සාදරයෙන් පිළිගනිමු\!</string>
     <string name="pass_welcome_message">
         සැකසුම් තුළ GPS, Lat/Lon හෝ QTH හරහා ඔබේ ස්ථානය සැකසීමට වග බලා ගන්න.
         \n\nනිවැරදි අනාවැකි ලබා ගැනීම සඳහා අවම වශයෙන් සතිපතා දත්ත සමුදාය යාවත්කාලීන කරන්න.</string>
@@ -93,11 +100,11 @@
     <string name="prefs_loc_qth_title">QTH</string>
     <string name="prefs_loc_qth_error">QTH locator වලංගු නොවේ</string>
     <string name="prefs_loc_success">පිහිටීම යාවත්කාලීනය සාර්ථකයි</string>
-    <string name="prefs_station_title">පොළෙහි පිහිටීම් පසුතල</string>
-    <string name="prefs_station_lat_text">ඔබගේ පොළෙහි අක්‍ෂාංශය සකසන්න</string>
-    <string name="prefs_station_lon_text">ඔබගේ පොළෙහි දේශාංශය සකසන්න</string>
-    <string name="prefs_locator_title">QTH locator පසුතල</string>
-    <string name="prefs_locator_text"> ඔබගේ locator භාවිතා කර පොළහි පිහිටීම සකසන්න</string>
+    <string name="prefs_station_title">පොළ පිහිටීම</string>
+    <string name="prefs_station_lat_text">පොළ අක්‍ෂාංශය</string>
+    <string name="prefs_station_lon_text">පොළ දේශාංශය</string>
+    <string name="prefs_locator_title">QTH locator</string>
+    <string name="prefs_locator_text">locator මඟින් පොළ පිහිටීම සකසන්න</string>
 
     <string name="prefs_data_title">චන්ද්‍රිකා දත්ත</string>
     <string name="prefs_data_entries">චන්ද්‍රිකා: %s</string>
@@ -107,38 +114,57 @@
     <string name="prefs_data_clear">පිරිසිදු ක°</string>
     <string name="prefs_data_clear_success">දත්ත ඉවත් කිරීම සාර්ථකයි</string>
     <string name="prefs_data_update_success">යාවත්කාලීනය සම්පූර්ණ කිරීම සාර්ථකයි</string>
+    <string name="prefs_data_import_satellites_error">චන්ද්‍රිකා ආයාත නොවීය. වලංගු TLE/3LE (.txt) හෝ OMM (.csv) ගොනුවක් තෝරන්න.</string>
+    <string name="prefs_data_import_transceivers_error">සම්ප්‍රේෂක ආයාත නොවීය. වලංගු SatNOGS (.json) ගොනුවක් තෝරන්න.</string>
 
-    <string name="prefs_data_sources_title">Custom data sources</string>
-    <string name="prefs_data_sources_tle_switch">Custom TLE URL</string>
-    <string name="prefs_data_sources_transceivers_switch">Custom transceivers URL</string>
+    <string name="prefs_data_sources_title">අභිරුචි මූලාශ්‍ර</string>
+    <string name="prefs_data_sources_tle_switch">TLE URL</string>
+    <string name="prefs_data_sources_transceivers_switch">Transceivers URL</string>
+    <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>
 
-    <string name="prefs_data_output_title">Data output</string>
-    <string name="prefs_net_output">Network</string>
+    <string name="prefs_data_output_title">දත්ත ප්‍රතිදානය</string>
+    <string name="prefs_net_output">ජාලය</string>
     <string name="prefs_bt_output">Bluetooth</string>
+    <string name="prefs_cat_output">CAT</string>
+
+    <string name="nav_radiocontrol">රේඩියෝ පාලනය</string>
+    <string name="rc_settings_title">CAT පාලනය</string>
+    <string name="rc_radio_model">රේඩියෝ මාදිලිය</string>
+    <string name="rc_tx_device_hint">TX BT ලිපිනය</string>
+    <string name="rc_rx_device_hint">RX BT ලිපිනය</string>
+    <string name="rc_tx_name_hint">TX රේඩියෝ නම</string>
+    <string name="rc_rx_name_hint">RX රේඩියෝ නම</string>
+    <string name="rc_enable_switch">CAT සබල කරන්න</string>
 
     <string name="prefs_net_title">ජාල ප්‍රතිදානය</string>
-    <string name="prefs_net_rotator_switch">Enable rotation output</string>
+    <string name="prefs_net_rotator_switch">Rotation ප්‍රතිදානය සබල කරන්න</string>
     <string name="prefs_net_rotator_address_hint">IP:Port</string>
-    <string name="prefs_net_rotator_format_hint">දත්ත අකාරය</string>
-    <string name="prefs_net_frequency_switch">Enable frequency output</string>
+    <string name="prefs_net_rotator_format_hint">දත්ත ආකෘතිය</string>
+    <string name="prefs_net_frequency_switch">Frequency ප්‍රතිදානය සබල කරන්න</string>
     <string name="prefs_net_frequency_address_hint">IP:Port</string>
-    <string name="prefs_net_frequency_format_hint">දත්ත අකාරය</string>
+    <string name="prefs_net_frequency_format_hint">දත්ත ආකෘතිය</string>
 
-    <string name="prefs_bt_title">Bluetooth දත්ත ප්‍රතිදානය</string>
-    <string name="prefs_bt_rotator_switch">Enable rotation output</string>
-    <string name="prefs_bt_rotator_device_hint">උපාංග id</string>
-    <string name="prefs_bt_rotator_output_hint">දත්ත අකාරය</string>
-    <string name="prefs_bt_frequency_switch">Enable frequency output</string>
-    <string name="prefs_bt_frequency_device_hint">උපාංග id</string>
-    <string name="prefs_bt_frequency_output_hint">දත්ත අකාරය</string>
+    <string name="prefs_bt_title">Bluetooth ප්‍රතිදානය</string>
+    <string name="prefs_bt_rotator_switch">Rotation ප්‍රතිදානය සබල කරන්න</string>
+    <string name="prefs_bt_rotator_device_hint">උපාංග ID</string>
+    <string name="prefs_bt_rotator_output_hint">දත්ත ආකෘතිය</string>
+    <string name="prefs_bt_frequency_switch">Frequency ප්‍රතිදානය සබල කරන්න</string>
+    <string name="prefs_bt_frequency_device_hint">උපාංග ID</string>
+    <string name="prefs_bt_frequency_output_hint">දත්ත ආකෘතිය</string>
     <string name="prefs_bt_perm_error">Bluetooth අවසර පරික්‍ෂා ක°</string>
     <string name="prefs_net_perm_error">Network අවසර පරික්‍ෂා කරන්න</string>
 
-    <string name="prefs_other_title">වෙනත් සැකසුම්</string>
-    <string name="prefs_other_switch_utc">පසුකර වේලාවන් UTC මගින්</string>
-    <string name="prefs_other_switch_update">ස්වයං දත්ත යාවත්කාලීනය</string>
-    <string name="prefs_other_switch_sweep">radar sweep සජීවිකරණය සබල කරන්න</string>
-    <string name="prefs_other_switch_sensors">Radar දර්ශනය කරකැවීමට සංවේදක භාවිතා කරන්න </string>
+    <string name="prefs_other_title">වෙනත්</string>
+    <string name="prefs_other_switch_utc">UTC වේලාව</string>
+    <string name="prefs_other_switch_update">දත්ත ස්වයං යාවත්කාලීන</string>
+    <string name="prefs_other_switch_sweep">Radar sweep</string>
+    <string name="prefs_other_switch_sensors">සංවේදක</string>
+    <string name="prefs_other_switch_night_mode">රාත්‍රී පෙරහන</string>
+
+    <string name="prefs_highlight_title">උස් උද්දීපනය</string>
+    <string name="prefs_highlight_low">අඩු &lt; %1$d°</string>
+    <string name="prefs_highlight_mid">මධ්‍ය %1$d-%2$d°</string>
+    <string name="prefs_highlight_high">ඉහළ &gt; %1$d°</string>
 
     <string name="prefs_outro_title">මම ස්තුති කිරීමට කැමති:</string>
     <string name="prefs_outro_license">මෘදුකාංගය වගකීමක් සමග නොලැබේ</string>

core/presentation/src/main/res/values-tr/strings.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <!-- Commmon -->
-    <string name="app_name" translatable="false">Look4Sat-CNMap</string>
+    <string name="app_name" translatable="false">Look4Sat</string>
     <string name="btn_accept">Kabul et</string>
     <string name="btn_cancel">İptal</string>
     <string name="empty_list_message">Gösterilecek veri bulunamadı</string>
@@ -14,26 +14,33 @@
     <string name="nav_prefs">Ayarlar</string>
 
     <!-- Satellites screen -->
-    <string name="sat_type_hint">Uydu türü: %s</string>
-    <string name="sat_type_title">Uydu türü seçin</string>
+    <string name="sat_type_hint">Modlar: %s</string>
+    <string name="sat_type_title">Modları seçin</string>
     <string name="sat_search_hint">Id - Ad</string>
     <string name="sat_search_clear">Temizle</string>
     <string name="sat_clear_all">Tümünü temizle</string>
     <string name="sat_select_all">Tümünü seç</string>
+    <string name="sat_group_selected">Seçilenler</string>
+    <string name="sat_group_available">Kullanılabilir</string>
+    <string name="sat_group_selected_count">Seçilenler (%1$d)</string>
+    <string name="sat_group_available_count">Kullanılabilir (%1$d)</string>
     <string name="sat_empty_list_message">"Arama sorgunuzun doğru olduğundan ve veritabanının güncellendiğinden emin olun"</string>
     <string name="sat_warning_title">Uyarı\!</string>
     <string name="sat_warning_message">
         Bu uygulamada 9000\'den fazla uydu listelenmiştir.
         Hepsini aynı anda takip etmek anlamsızdır.
         \n\nListeyi yalnızca ilgilendiğiniz uydularla
-        daraltmak için arama ve tür seçiciyi kullanın.</string>
+        daraltmak için arama ve mod seçiciyi kullanın.</string>
 
     <!-- Passes screen -->
     <string name="pass_filter_title">Geçişleri filtrele</string>
     <string name="pass_filter_elev">Minimum yükseklik açısı</string>
-    <string name="pass_filter_hours">Gösterilecek saat aralığı</string>
+    <string name="pass_filter_hours">Gösterilecek zaman</string>
+    <string name="pass_filter_aos_time">AOS aralığı</string>
+    <string name="pass_filter_invert_time">AOS aralığını tersine çevir</string>
+    <string name="pass_filter_deep_space">DeepSpace (periyot &gt;225dk)</string>
     <string name="pass_time_placeholder" translatable="false"> -- : -- : -- </string>
-    <string name="pass_modes_title">Modulasyon türü seçin</string>
+    <string name="pass_modes_title">Modları seçin</string>
     <string name="pass_satId" translatable="false">%05d</string>
     <string name="pass_elevation">Yükseklik açısı: %.1f°</string>
     <string name="pass_deep_space" translatable="false">DeepSpace</string>
@@ -42,11 +49,11 @@
     <string name="pass_empty_list_message">
         Filtrelerinizin doğru olduğundan ve uydu seçtiğinizden emin olun</string>
     <string name="pass_error_message">Gösterilecek yaklaşan uydu geçişi bulunmuyor</string>
-    <string name="pass_welcome_title">Look4Sat-CNMap\'a hoş geldiniz\!</string>
+    <string name="pass_welcome_title">Look4Sat\'a hoş geldiniz\!</string>
     <string name="pass_welcome_message">
         Ayarlar\'dan GPS, Enlem/Boylam veya QTH kullanarak konumunuzu belirlediğinizden emin olun.
         \n\nDoğru tahminler alabilmek için veritabanını en az haftada bir güncelleyin.</string>
-    <string name="pass_whatsnew_title" translatable="false">What\'s new in Look4Sat-CNMap</string>
+    <string name="pass_whatsnew_title" translatable="false">What\'s new in Look4Sat</string>
     <string name="pass_whatsnew_message" translatable="false">
         * Switched to short-form commands in NetworkReporter, by theojalba
         \n* Added CAT radio control for full-duplex SAT operation, by jcmerg
@@ -84,8 +91,7 @@
     <!-- Map screen -->
     <string name="map_prev">Önceki</string>
     <string name="map_next">Sonraki</string>
-    <string name="map_copyright_osm" translatable="false">© OpenStreetMap contributors</string>
-    <string name="map_copyright_tianditu" translatable="false">© Tianditu</string>
+    <string name="map_copyright" translatable="false">© OpenStreetMap contributors</string>
     <string name="map_azimuth">Azimut: %.1f°</string>
     <string name="map_elevation">Yükseklik açısı: %.1f°</string>
     <string name="map_altitude">İrtifa: %.0f km</string>
@@ -101,12 +107,12 @@
     <string name="map_visible">Görünür</string>
 
     <!-- Settings screen -->
-    <string name="prefs_app_title" translatable="false">Look4Sat-CNMap v%s</string>
-    <string name="prefs_app_url" translatable="false">https://play.google.com/store/apps/details?id=cn.bh2vsq.look4sat</string>
+    <string name="prefs_app_title" translatable="false">Look4Sat v%s</string>
+    <string name="prefs_app_url" translatable="false">https://play.google.com/store/apps/details?id=com.rtbishop.look4sat</string>
     <string name="prefs_donate_title">Bağış yap</string>
     <string name="prefs_donate_url" translatable="false">https://ko-fi.com/rt_bishop</string>
     <string name="prefs_fdroid_title" translatable="false">F-Droid</string>
-    <string name="prefs_fdroid_url" translatable="false">https://f-droid.org/en/packages/cn.bh2vsq.look4sat/</string>
+    <string name="prefs_fdroid_url" translatable="false">https://f-droid.org/en/packages/com.rtbishop.look4sat/</string>
     <string name="prefs_github_title" translatable="false">GitHub</string>
     <string name="prefs_github_url" translatable="false">https://github.com/rt-bishop/Look4Sat/</string>
     <string name="prefs_license_title" translatable="false">GPLv3</string>
@@ -125,11 +131,11 @@
     <string name="prefs_loc_qth_title">QTH</string>
     <string name="prefs_loc_qth_error">Geçersiz QTH konumlandırıcısı</string>
     <string name="prefs_loc_success">Konum başarıyla güncellendi</string>
-    <string name="prefs_station_title">İstasyon konumu ayarları</string>
-    <string name="prefs_station_lat_text">Yer istasyonunuzun enlemini girin</string>
-    <string name="prefs_station_lon_text">Yer istasyonunuzun boylamını girin</string>
-    <string name="prefs_locator_title">QTH konumlandırıcı ayarları</string>
-    <string name="prefs_locator_text">İstasyon konumunu konumlandırıcı ile ayarlayın</string>
+    <string name="prefs_station_title">İstasyon konumu</string>
+    <string name="prefs_station_lat_text">İstasyon enlemi</string>
+    <string name="prefs_station_lon_text">İstasyon boylamı</string>
+    <string name="prefs_locator_title">QTH konumlandırıcı</string>
+    <string name="prefs_locator_text">Konumu lokatörle ayarla</string>
 
     <string name="prefs_data_title">Uydu verisi</string>
     <string name="prefs_data_entries">Uydular: %s</string>
@@ -139,28 +145,30 @@
     <string name="prefs_data_clear">Temizle</string>
     <string name="prefs_data_clear_success">Veriler başarıyla temizlendi</string>
     <string name="prefs_data_update_success">Güncelleme başarıyla tamamlandı</string>
+    <string name="prefs_data_import_satellites_error">Uydu içe aktarılmadı. Geçerli bir TLE/3LE (.txt) veya OMM (.csv) dosyası seçin.</string>
+    <string name="prefs_data_import_transceivers_error">Transceiver içe aktarılmadı. Geçerli bir SatNOGS (.json) dosyası seçin.</string>
 
-    <string name="prefs_data_sources_title">Özel veri kaynakları</string>
-    <string name="prefs_data_sources_tle_switch">Özel TLE URL</string>
-    <string name="prefs_data_sources_transceivers_switch">Özel transceiver URL</string>
+    <string name="prefs_data_sources_title">Özel kaynaklar</string>
+    <string name="prefs_data_sources_tle_switch">TLE URL</string>
+    <string name="prefs_data_sources_transceivers_switch">Transceiver URL</string>
     <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>
 
-    <string name="prefs_data_output_title">Veri aktarımı</string>
+    <string name="prefs_data_output_title">Veri çıkışı</string>
     <string name="prefs_net_output">Ağ</string>
     <string name="prefs_bt_output">Bluetooth</string>
     <string name="prefs_cat_output">CAT</string>
 
     <!-- Radio Control -->
     <string name="nav_radiocontrol">Radyo Kontrolü</string>
-    <string name="rc_settings_title">CAT Radyo Kontrolü</string>
+    <string name="rc_settings_title">CAT kontrolü</string>
     <string name="rc_radio_model">Radyo Modeli</string>
-    <string name="rc_tx_device_hint">TX Radyo BT Adresi</string>
-    <string name="rc_rx_device_hint">RX Radyo BT Adresi</string>
+    <string name="rc_tx_device_hint">TX BT adresi</string>
+    <string name="rc_rx_device_hint">RX BT adresi</string>
     <string name="rc_tx_name_hint">TX Radyo Adı</string>
     <string name="rc_rx_name_hint">RX Radyo Adı</string>
-    <string name="rc_enable_switch">CAT Kontrolünü Etkinleştir</string>
+    <string name="rc_enable_switch">CAT\'i etkinleştir</string>
 
-    <string name="prefs_net_title">Ağ veri çıkışı</string>
+    <string name="prefs_net_title">Ağ çıkışı</string>
     <string name="prefs_net_rotator_switch">Döndürme çıkışını etkinleştir</string>
     <string name="prefs_net_rotator_address_hint">IP:Port</string>
     <string name="prefs_net_rotator_format_hint">Biçim</string>
@@ -168,21 +176,27 @@
     <string name="prefs_net_frequency_address_hint">IP:Port</string>
     <string name="prefs_net_frequency_format_hint">Biçim</string>
 
-    <string name="prefs_bt_title">Bluetooth veri çıkışı</string>
+    <string name="prefs_bt_title">Bluetooth çıkışı</string>
     <string name="prefs_bt_rotator_switch">Döndürme çıkışını etkinleştir</string>
     <string name="prefs_bt_rotator_device_hint">Cihaz kimliği</string>
-    <string name="prefs_bt_rotator_output_hint">Veri biçimi</string>
+    <string name="prefs_bt_rotator_output_hint">Biçim</string>
     <string name="prefs_bt_frequency_switch">Frekans çıkışını etkinleştir</string>
     <string name="prefs_bt_frequency_device_hint">Cihaz kimliği</string>
-    <string name="prefs_bt_frequency_output_hint">Veri biçimi</string>
+    <string name="prefs_bt_frequency_output_hint">Biçim</string>
     <string name="prefs_bt_perm_error">Bluetooth izninizi kontrol edin</string>
     <string name="prefs_net_perm_error">Ağ izninizi kontrol edin</string>
 
-    <string name="prefs_other_title">Diğer ayarlar</string>
-    <string name="prefs_other_switch_utc">Geçiş saatini UTC olarak göster</string>
-    <string name="prefs_other_switch_update">Otomatik veri güncellemeyi etkinleştir</string>
-    <string name="prefs_other_switch_sweep">Radar taramasını etkinleştir</string>
-    <string name="prefs_other_switch_sensors">Radar görünümünü döndürmek için sensörleri kullan</string>
+    <string name="prefs_other_title">Diğer</string>
+    <string name="prefs_other_switch_utc">UTC saati</string>
+    <string name="prefs_other_switch_update">Veriyi otomatik güncelle</string>
+    <string name="prefs_other_switch_sweep">Radar taraması</string>
+    <string name="prefs_other_switch_sensors">Sensör</string>
+    <string name="prefs_other_switch_night_mode">Gece filtresi</string>
+
+    <string name="prefs_highlight_title">Elevasyon vurgusu</string>
+    <string name="prefs_highlight_low">Düşük &lt; %1$d°</string>
+    <string name="prefs_highlight_mid">Orta %1$d-%2$d°</string>
+    <string name="prefs_highlight_high">Yüksek &gt; %1$d°</string>
 
     <string name="prefs_outro_title">Teşekkürler</string>
     <string name="prefs_outro_thanks" translatable="false">

core/presentation/src/main/res/values-uk/strings.xml

@@ -13,12 +13,16 @@
     <string name="nav_prefs">Налаштування</string>
 
     <!-- Satellites screen -->
-    <string name="sat_type_hint">Тип: %s</string>
-    <string name="sat_type_title">Виберіть тип супутника</string>
+    <string name="sat_type_hint">Режими: %s</string>
+    <string name="sat_type_title">Виберіть режими</string>
     <string name="sat_search_hint">Id - Назва</string>
     <string name="sat_search_clear">Очистити</string>
     <string name="sat_clear_all">Очистити всі</string>
     <string name="sat_select_all">Вибрати всі</string>
+    <string name="sat_group_selected">Обрані</string>
+    <string name="sat_group_available">Доступні</string>
+    <string name="sat_group_selected_count">Обрані (%1$d)</string>
+    <string name="sat_group_available_count">Доступні (%1$d)</string>
     <string name="sat_empty_list_message">
         Переконайтеся, що ваш пошуковий запит правильний, а база даних оновлена</string>
     <string name="sat_warning_title">Увага\!</string>
@@ -26,19 +30,22 @@
         У цьому додатку перелічено понад 9000 супутників.
         Немає сенсу відстежувати їх усі одночасно.
         \n\nЗавжди намагайтеся звузити список лише до тих,
-        які вас цікавлять, за допомогою пошуку та селектора типів.</string>
+        які вас цікавлять, за допомогою пошуку та вибору режимів.</string>
 
     <!-- Passes screen -->
     <string name="pass_filter_title">Фільтр прольотів</string>
-    <string name="pass_filter_elev">Мінімальне піднесення</string>
-    <string name="pass_filter_hours">Кількість годин</string>
-    <string name="pass_modes_title">Виберіть тип модуляції</string>
+    <string name="pass_filter_elev">Мінімальне піднесень</string>
+    <string name="pass_filter_hours">Час вперед</string>
+    <string name="pass_filter_aos_time">Вікно AOS</string>
+    <string name="pass_filter_invert_time">Інвертувати вікно AOS</string>
+    <string name="pass_filter_deep_space">DeepSpace (період &gt;225хв)</string>
+    <string name="pass_modes_title">Виберіть режими</string>
     <string name="pass_elevation">Піднес.: %.1f°</string>
     <string name="pass_altitude">Висота: %.0f км</string>
     <string name="pass_empty_list_message">
         Переконайтеся, що ваші фільтри правильні, і ви вибрали супутники</string>
     <string name="pass_error_message">Немає майбутніх прольотів супутників</string>
-    <string name="pass_welcome_title">Ласкаво просимо до Look4Sat-CNMap\!</string>
+    <string name="pass_welcome_title">Ласкаво просимо до Look4Sat\!</string>
     <string name="pass_welcome_message">
         Обов’язково встановіть своє місцезнаходження за допомогою GPS, широти/довготи або QTH у налаштуваннях.
         \n\nБудь ласка, оновлюйте базу даних принаймні раз на тиждень, щоб отримувати точні прогнози.</string>
@@ -66,7 +73,7 @@
     <string name="map_prev">Попередній</string>
     <string name="map_next">Наступний</string>
     <string name="map_azimuth">Азимут: %.1f°</string>
-    <string name="map_elevation">Піднесення: %.1f°</string>
+    <string name="map_elevation">Піднесень: %.1f°</string>
     <string name="map_altitude">Висота: %.0f км</string>
     <string name="map_distance">Дистанція: %.0f км</string>
     <string name="map_latitude">Широта: %.1f°</string>
@@ -93,11 +100,11 @@
     <string name="prefs_loc_qth_title">QTH</string>
     <string name="prefs_loc_qth_error">Некоректний локатор QTH</string>
     <string name="prefs_loc_success">Позицію успішно оновлено</string>
-    <string name="prefs_station_title">Налаштування місцезнаходження станції</string>
-    <string name="prefs_station_lat_text">Широта місцезнаходження станції</string>
-    <string name="prefs_station_lon_text">Довгота місцезнаходження станції</string>
-    <string name="prefs_locator_title">Налаштування QTH локатора</string>
-    <string name="prefs_locator_text">Задати позицію за QTH локатором</string>
+    <string name="prefs_station_title">Позиція станції</string>
+    <string name="prefs_station_lat_text">Широта станції</string>
+    <string name="prefs_station_lon_text">Довгота станції</string>
+    <string name="prefs_locator_title">Локатор QTH</string>
+    <string name="prefs_locator_text">Позиція за локатором</string>
 
     <string name="prefs_data_title">Супутникові дані</string>
     <string name="prefs_data_entries">Супутників: %s</string>
@@ -107,38 +114,57 @@
     <string name="prefs_data_clear">Очистити</string>
     <string name="prefs_data_clear_success">Дані успішно очищено</string>
     <string name="prefs_data_update_success">Оновлення успішне</string>
+    <string name="prefs_data_import_satellites_error">Супутники не імпортовано. Потрібен TLE/3LE (.txt) або OMM (.csv).</string>
+    <string name="prefs_data_import_transceivers_error">Трансивери не імпортовано. Потрібен SatNOGS (.json).</string>
 
-    <string name="prefs_data_sources_title">Custom data sources</string>
-    <string name="prefs_data_sources_tle_switch">Custom TLE URL</string>
-    <string name="prefs_data_sources_transceivers_switch">Custom transceivers URL</string>
+    <string name="prefs_data_sources_title">Власні джерела</string>
+    <string name="prefs_data_sources_tle_switch">URL TLE</string>
+    <string name="prefs_data_sources_transceivers_switch">URL трансиверів</string>
+    <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>
 
-    <string name="prefs_data_output_title">Data output</string>
-    <string name="prefs_net_output">Network</string>
+    <string name="prefs_data_output_title">Вивід даних</string>
+    <string name="prefs_net_output">Мережа</string>
     <string name="prefs_bt_output">Bluetooth</string>
+    <string name="prefs_cat_output">CAT</string>
 
-    <string name="prefs_net_title">Вивід мережевих даних</string>
-    <string name="prefs_net_rotator_switch">Enable rotation output</string>
+    <string name="nav_radiocontrol">Керування радіо</string>
+    <string name="rc_settings_title">CAT керування</string>
+    <string name="rc_radio_model">Модель радіо</string>
+    <string name="rc_tx_device_hint">BT адреса TX</string>
+    <string name="rc_rx_device_hint">BT адреса RX</string>
+    <string name="rc_tx_name_hint">Назва радіо TX</string>
+    <string name="rc_rx_name_hint">Назва радіо RX</string>
+    <string name="rc_enable_switch">Увімкнути CAT</string>
+
+    <string name="prefs_net_title">Мережевий вивід</string>
+    <string name="prefs_net_rotator_switch">Увімкнути вивід повороту</string>
     <string name="prefs_net_rotator_address_hint">IP:Порт</string>
     <string name="prefs_net_rotator_format_hint">Формат даних</string>
-    <string name="prefs_net_frequency_switch">Enable frequency output</string>
+    <string name="prefs_net_frequency_switch">Увімкнути вивід частоти</string>
     <string name="prefs_net_frequency_address_hint">IP:Порт</string>
     <string name="prefs_net_frequency_format_hint">Формат даних</string>
 
-    <string name="prefs_bt_title">Вивід даних Bluetooth</string>
-    <string name="prefs_bt_rotator_switch">Enable rotation output</string>
-    <string name="prefs_bt_rotator_device_hint">Id пристрою</string>
+    <string name="prefs_bt_title">Вивід Bluetooth</string>
+    <string name="prefs_bt_rotator_switch">Увімкнути вивід повороту</string>
+    <string name="prefs_bt_rotator_device_hint">ID пристрою</string>
     <string name="prefs_bt_rotator_output_hint">Формат даних</string>
-    <string name="prefs_bt_frequency_switch">Enable frequency output</string>
-    <string name="prefs_bt_frequency_device_hint">Id пристрою</string>
+    <string name="prefs_bt_frequency_switch">Увімкнути вивід частоти</string>
+    <string name="prefs_bt_frequency_device_hint">ID пристрою</string>
     <string name="prefs_bt_frequency_output_hint">Формат даних</string>
     <string name="prefs_bt_perm_error">Перевірте дозвіл Bluetooth</string>
     <string name="prefs_net_perm_error">Перевірте дозвіл мережі</string>
 
-    <string name="prefs_other_title">Інші налаштування</string>
-    <string name="prefs_other_switch_utc">Показувати час в UTC</string>
-    <string name="prefs_other_switch_update">Автоматичне оновлення даних</string>
-    <string name="prefs_other_switch_sweep">Показувати анімацію радара</string>
-    <string name="prefs_other_switch_sensors">Використовувати сенсори пристрою</string>
+    <string name="prefs_other_title">Інше</string>
+    <string name="prefs_other_switch_utc">Час в UTC</string>
+    <string name="prefs_other_switch_update">Автооновлення даних</string>
+    <string name="prefs_other_switch_sweep">Анімація радара</string>
+    <string name="prefs_other_switch_sensors">Сенсори</string>
+    <string name="prefs_other_switch_night_mode">Нічний фільтр</string>
+
+    <string name="prefs_highlight_title">Підсвічування висоти</string>
+    <string name="prefs_highlight_low">Низько &lt; %1$d°</string>
+    <string name="prefs_highlight_mid">Середньо %1$d-%2$d°</string>
+    <string name="prefs_highlight_high">Високо &gt; %1$d°</string>
 
     <string name="prefs_outro_title">Я хотів би подякувати:</string>
     <string name="prefs_outro_license">Ця програма поставляється без жодних гарантій</string>

core/presentation/src/main/res/values-zh/strings.xml

@@ -13,26 +13,33 @@
     <string name="nav_prefs">设置</string>
 
     <!-- Satellites screen -->
-    <string name="sat_type_hint">类型：%s</string>
-    <string name="sat_type_title">选择卫星类型</string>
+    <string name="sat_type_hint">模式：%s</string>
+    <string name="sat_type_title">选择模式</string>
     <string name="sat_search_hint">Id - 名称</string>
     <string name="sat_search_clear">清空</string>
     <string name="sat_clear_all">全部清空</string>
     <string name="sat_select_all">全选</string>
+    <string name="sat_group_selected">已选择</string>
+    <string name="sat_group_available">可用</string>
+    <string name="sat_group_selected_count">已选择（%1$d）</string>
+    <string name="sat_group_available_count">可用（%1$d）</string>
     <string name="sat_empty_list_message">请确保您的搜索查询正确且数据库已更新</string>
     <string name="sat_warning_title">警告\!</string>
-    <string name="sat_warning_message">此应用收录了超过9000颗卫星信息\n同时追踪所有卫星并不现实\n建议始终通过搜索和分类筛选功能仅勾选您感兴趣的卫星</string>
+    <string name="sat_warning_message">此应用收录了超过9000颗卫星信息\n同时追踪所有卫星并不现实\n建议始终通过搜索和模式筛选功能仅勾选您感兴趣的卫星</string>
 
     <!-- Passes screen -->
     <string name="pass_filter_title">筛选过境</string>
     <string name="pass_filter_elev">仰角值</string>
-    <string name="pass_filter_hours">小时数</string>
-    <string name="pass_modes_title">选择调制类型</string>
+    <string name="pass_filter_hours">提前时间</string>
+    <string name="pass_filter_aos_time">AOS 时间段</string>
+    <string name="pass_filter_invert_time">反选 AOS 时间段</string>
+    <string name="pass_filter_deep_space">DeepSpace（周期 &gt;225分钟）</string>
+    <string name="pass_modes_title">选择模式</string>
     <string name="pass_elevation">仰角：%.1f°</string>
     <string name="pass_altitude">高度：%d km</string>
     <string name="pass_empty_list_message">请确保您的过滤器设置正确，并且已选择卫星</string>
     <string name="pass_error_message">没有即将过境的卫星</string>
-    <string name="pass_welcome_title">欢迎来到 Look4Sat-CNMap\!</string>
+    <string name="pass_welcome_title">欢迎来到 Look4Sat\!</string>
     <string name="pass_welcome_message">请务必在设置中通过GPS、经纬度或QTH定位您的位置\n建议至少每周更新一次数据库，以确保预测结果的准确性</string>
 
     <!-- Radar screen -->
@@ -53,6 +60,9 @@
     <string name="radar_string_no">否</string>
     <string name="radar_string_yes">是</string>
     <string name="radar_visible">日照中</string>
+    <string name="radar_doppler_tx_hint">输入上行频率 (MHz)</string>
+    <string name="radar_doppler_rx_hint">输入下行频率 (MHz)</string>
+    <string name="radar_doppler_offset_hint">偏移 (kHz)</string>
 
     <!-- Map screen -->
     <string name="map_prev">上一个</string>
@@ -77,7 +87,7 @@
     <string name="prefs_updated_title">更新：%s</string>
     <string name="prefs_updated_time">yyyy MMM d - HH:mm:ss</string>
 
-    <string name="prefs_loc_title">站位</string>
+    <string name="prefs_loc_title">站点位置</string>
     <string name="prefs_loc_gps_title">GPS 定位</string>
     <string name="prefs_loc_gps_error">检查您的位置权限</string>
     <string name="prefs_loc_input_title">输入位置</string>
@@ -85,11 +95,11 @@
     <string name="prefs_loc_qth_title">QTH 网格</string>
     <string name="prefs_loc_qth_error">无效的 QTH 网格</string>
     <string name="prefs_loc_success">位置更新成功</string>
-    <string name="prefs_station_title">站位设置</string>
-    <string name="prefs_station_lat_text">输入站位的纬度</string>
-    <string name="prefs_station_lon_text">输入站位的经度</string>
-    <string name="prefs_locator_title">QTH 网格</string>
-    <string name="prefs_locator_text">使用梅登黑德网格设置站位</string>
+    <string name="prefs_station_title">站点位置</string>
+    <string name="prefs_station_lat_text">站点纬度</string>
+    <string name="prefs_station_lon_text">站点经度</string>
+    <string name="prefs_locator_title">QTH 定位</string>
+    <string name="prefs_locator_text">通过 QTH 设置站点位置</string>
 
     <string name="prefs_data_title">卫星数据更新</string>
     <string name="prefs_data_entries">卫星：%s</string>
@@ -99,16 +109,29 @@
     <string name="prefs_data_clear">清空</string>
     <string name="prefs_data_clear_success">数据清空成功</string>
     <string name="prefs_data_update_success">更新成功</string>
+    <string name="prefs_data_import_satellites_error">未导入卫星。请选择有效的 TLE/3LE (.txt) 或 OMM (.csv) 文件。</string>
+    <string name="prefs_data_import_transceivers_error">未导入收发器。请选择有效的 SatNOGS (.json) 文件。</string>
 
-    <string name="prefs_data_sources_title">自定义数据源</string>
-    <string name="prefs_data_sources_tle_switch">自定义TLE URL</string>
-    <string name="prefs_data_sources_transceivers_switch">自定义收发器URL</string>
+    <string name="prefs_data_sources_title">自定义源</string>
+    <string name="prefs_data_sources_tle_switch">TLE URL</string>
+    <string name="prefs_data_sources_transceivers_switch">收发器 URL</string>
+    <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>
 
     <string name="prefs_data_output_title">数据输出</string>
     <string name="prefs_net_output">网络</string>
     <string name="prefs_bt_output">蓝牙</string>
+    <string name="prefs_cat_output">CAT</string>
 
-    <string name="prefs_net_title">网络数据输出</string>
+    <string name="nav_radiocontrol">电台控制</string>
+    <string name="rc_settings_title">CAT 控制</string>
+    <string name="rc_radio_model">电台型号</string>
+    <string name="rc_tx_device_hint">TX 电台蓝牙地址</string>
+    <string name="rc_rx_device_hint">RX 电台蓝牙地址</string>
+    <string name="rc_tx_name_hint">TX 电台名称</string>
+    <string name="rc_rx_name_hint">RX 电台名称</string>
+    <string name="rc_enable_switch">启用 CAT</string>
+
+    <string name="prefs_net_title">网络输出</string>
     <string name="prefs_net_rotator_switch">启用方位俯仰角输出</string>
     <string name="prefs_net_rotator_address_hint">IP:端口</string>
     <string name="prefs_net_rotator_format_hint">数据格式</string>
@@ -116,7 +139,7 @@
     <string name="prefs_net_frequency_address_hint">IP:端口</string>
     <string name="prefs_net_frequency_format_hint">数据格式</string>
 
-    <string name="prefs_bt_title">蓝牙数据输出</string>
+    <string name="prefs_bt_title">蓝牙输出</string>
     <string name="prefs_bt_rotator_switch">启用方位俯仰角输出</string>
     <string name="prefs_bt_rotator_device_hint">蓝牙设备 ID</string>
     <string name="prefs_bt_rotator_output_hint">数据格式</string>
@@ -126,12 +149,19 @@
     <string name="prefs_bt_perm_error">请检查蓝牙权限</string>
     <string name="prefs_net_perm_error">请检查网络权限</string>
 
-    <string name="prefs_other_title">其他设置</string>
-    <string name="prefs_other_switch_utc">以 UTC 时间显示</string>
-    <string name="prefs_other_switch_update">启用卫星数据自动更新</string>
-    <string name="prefs_other_switch_sweep">启用雷达扫描动画</string>
-    <string name="prefs_other_switch_sensors">使用传感器旋转雷达视图</string>
-    <string name="prefs_other_switch_night_mode">启用红色夜间模式</string>
+    <string name="prefs_other_title">其他</string>
+    <string name="prefs_other_switch_utc">UTC 时间</string>
+    <string name="prefs_other_switch_update">自动更新数据</string>
+    <string name="prefs_other_switch_sweep">雷达扫描动画</string>
+    <string name="prefs_other_switch_sensors">传感器控制雷达</string>
+    <string name="prefs_other_switch_night_mode">红色夜间模式</string>
+    <string name="prefs_other_compass_offset">雷达罗盘水平偏移量</string>
+    <string name="prefs_other_compass_offset_elev">雷达罗盘俯仰偏移量</string>
+
+    <string name="prefs_highlight_title">仰角高亮</string>
+    <string name="prefs_highlight_low">低 &lt; %1$d°</string>
+    <string name="prefs_highlight_mid">中 %1$d-%2$d°</string>
+    <string name="prefs_highlight_high">高 &gt; %1$d°</string>
 
     <string name="prefs_outro_title">我要感谢：</string>
     <string name="prefs_outro_thanks" translatable="false">

core/presentation/src/main/res/values/strings.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <!-- Commmon -->
-    <string name="app_name" translatable="false">Look4Sat-CNMap</string>
+    <string name="app_name" translatable="false">Look4Sat</string>
     <string name="btn_accept">Accept</string>
     <string name="btn_cancel">Cancel</string>
     <string name="empty_list_message">No data to show</string>
@@ -14,27 +14,33 @@
     <string name="nav_prefs">Settings</string>
 
     <!-- Satellites screen -->
-    <string name="sat_type_hint">Type: %s</string>
-    <string name="sat_type_title">Select satellite type</string>
+    <string name="sat_type_hint">Modes: %s</string>
+    <string name="sat_type_title">Select modes</string>
     <string name="sat_search_hint">Id - Name</string>
     <string name="sat_search_clear">Clear</string>
     <string name="sat_clear_all">Clear all</string>
     <string name="sat_select_all">Select all</string>
+    <string name="sat_group_selected">Selected</string>
+    <string name="sat_group_available">Available</string>
+    <string name="sat_group_selected_count">Selected (%1$d)</string>
+    <string name="sat_group_available_count">Available (%1$d)</string>
     <string name="sat_empty_list_message">"Make sure your search query is correct and the DB is updated"</string>
     <string name="sat_warning_title">Warning\!</string>
     <string name="sat_warning_message">
         There are over 9000 satellites listed in this app.
         It makes no sense to track them all at the same time.
         \n\nAlways try to narrow down the list to only the ones
-        you\'re interested in via search and types selector.</string>
+        you\'re interested in via search and the modes selector.</string>
 
     <!-- Passes screen -->
     <string name="pass_filter_title">Filter passes</string>
     <string name="pass_filter_elev">Minimal elevation</string>
-    <string name="pass_filter_hours">Hours ahead</string>
+    <string name="pass_filter_hours">Time ahead</string>
+    <string name="pass_filter_aos_time">AOS window</string>
+    <string name="pass_filter_invert_time">Invert AOS window</string>
     <string name="pass_filter_deep_space">DeepSpace (period >225min)</string>
     <string name="pass_time_placeholder" translatable="false"> -- : -- : -- </string>
-    <string name="pass_modes_title">Select modulation type</string>
+    <string name="pass_modes_title">Select modes</string>
     <string name="pass_satId" translatable="false">%05d</string>
     <string name="pass_elevation">Elevation: %.1f°</string>
     <string name="pass_deep_space" translatable="false">DeepSpace</string>
@@ -43,16 +49,39 @@
     <string name="pass_empty_list_message">
         Make sure your filters are correct and you have selected satellites</string>
     <string name="pass_error_message">There are no upcoming satellite passes to display</string>
-    <string name="pass_welcome_title">Welcome to Look4Sat-CNMap\!</string>
+    <string name="pass_welcome_title">Welcome to Look4Sat\!</string>
     <string name="pass_welcome_message">
         Make sure to set your position via GPS, Lat/Lon or QTH in Settings.
         \n\nPlease update the database at least weekly to get accurate predictions.</string>
-    <string name="pass_whatsnew_title" translatable="false">What\'s new in Look4Sat-CNMap</string>
+    <string name="pass_whatsnew_title" translatable="false">What\'s new in Look4Sat</string>
     <string name="pass_whatsnew_message" translatable="false">
-        * Added required tweaks to support Android 17 (API 37)
-        \n\n* Added ACCESS_LOCAL_NETWORK permission check to support network data output
+        * Added small tweaks to Sources and strings. Added official ISS source (#225)
+        \n* Implemented AOS window and elevation highlight filters (#226)
+        \n* Added cleartext traffic support for custom TLE URLs (#227)
+        \n* Fixed manual OMM (.csv) data import, tweaked error messaging (#228)
+        \n* Added support for Icom IC-705 CAT by ruilvo (#229)
+        \n* Added configurable Radar offset to the sensors output by qwqtoday (#230)
+        \n* Localized pass date and time formats for Chinese by atsunatsu (#231)
+        \n* Added linear transponder Doppler calculator by atsunatsu (#232)
+        \n* Added a few tweaks to SSTV sensitivity and reception, similar to Robot36
+        \n* Replaced the types selection dialog with modes selection to avoid confusion
     </string>
 
+    <!-- AMSAT Status screen -->
+    <string name="nav_amsat">AMSAT</string>
+    <string name="amsat_title">AMSAT Satellite Status</string>
+    <string name="amsat_refresh">Refresh</string>
+    <string name="amsat_retry">Retry</string>
+    <string name="amsat_updated">Updated:</string>
+    <string name="amsat_active">Active</string>
+    <string name="amsat_tlm">TLM/Beacon</string>
+    <string name="amsat_not_heard">Not Heard</string>
+    <string name="amsat_conflict">Conflicting</string>
+    <string name="amsat_name">Name</string>
+    <string name="amsat_load_failed">Load failed - check network and retry</string>
+    <string name="amsat_no_reports">No reports for this period</string>
+    <string name="amsat_close">Close</string>
+
     <!-- Radar screen -->
     <string name="radar_back">Back</string>
     <string name="radar_notify">Notify</string>
@@ -78,12 +107,14 @@
     <string name="radar_string_no">No</string>
     <string name="radar_string_yes">Yes</string>
     <string name="radar_visible">Visible</string>
+    <string name="radar_doppler_tx_hint">Enter TX freq (MHz)</string>
+    <string name="radar_doppler_rx_hint">Enter RX freq (MHz)</string>
+    <string name="radar_doppler_offset_hint">Offset (kHz)</string>
 
     <!-- Map screen -->
     <string name="map_prev">Prev</string>
     <string name="map_next">Next</string>
-    <string name="map_copyright_osm" translatable="false">© OpenStreetMap contributors</string>
-    <string name="map_copyright_tianditu" translatable="false">© Tianditu</string>
+    <string name="map_copyright" translatable="false">© OpenStreetMap contributors</string>
     <string name="map_azimuth">Azimuth: %.1f°</string>
     <string name="map_elevation">Elevation: %.1f°</string>
     <string name="map_altitude">Altitude: %.0f km</string>
@@ -99,12 +130,12 @@
     <string name="map_visible">Visible</string>
 
     <!-- Settings screen -->
-    <string name="prefs_app_title" translatable="false">Look4Sat-CNMap v%s</string>
-    <string name="prefs_app_url" translatable="false">https://play.google.com/store/apps/details?id=cn.bh2vsq.look4sat</string>
+    <string name="prefs_app_title" translatable="false">Look4Sat v%s</string>
+    <string name="prefs_app_url" translatable="false">https://play.google.com/store/apps/details?id=com.rtbishop.look4sat</string>
     <string name="prefs_donate_title">Donate</string>
     <string name="prefs_donate_url" translatable="false">https://ko-fi.com/rt_bishop</string>
     <string name="prefs_fdroid_title" translatable="false">F-Droid</string>
-    <string name="prefs_fdroid_url" translatable="false">https://f-droid.org/en/packages/cn.bh2vsq.look4sat/</string>
+    <string name="prefs_fdroid_url" translatable="false">https://f-droid.org/en/packages/com.rtbishop.look4sat/</string>
     <string name="prefs_github_title" translatable="false">GitHub</string>
     <string name="prefs_github_url" translatable="false">https://github.com/rt-bishop/Look4Sat/</string>
     <string name="prefs_license_title" translatable="false">GPLv3</string>
@@ -123,11 +154,11 @@
     <string name="prefs_loc_qth_title">QTH</string>
     <string name="prefs_loc_qth_error">Invalid QTH locator</string>
     <string name="prefs_loc_success">Position updated successfully</string>
-    <string name="prefs_station_title">Station position settings</string>
-    <string name="prefs_station_lat_text">Set your ground station\'s latitude</string>
-    <string name="prefs_station_lon_text">Set your ground station\'s longitude</string>
-    <string name="prefs_locator_title">QTH locator settings</string>
-    <string name="prefs_locator_text">Set station\'s position using locator</string>
+    <string name="prefs_station_title">Station position</string>
+    <string name="prefs_station_lat_text">Station latitude</string>
+    <string name="prefs_station_lon_text">Station longitude</string>
+    <string name="prefs_locator_title">QTH locator</string>
+    <string name="prefs_locator_text">Set position via locator</string>
 
     <string name="prefs_data_title">Satellite data</string>
     <string name="prefs_data_entries">Satellites: %s</string>
@@ -137,10 +168,12 @@
     <string name="prefs_data_clear">Clear</string>
     <string name="prefs_data_clear_success">Data was cleared successfully</string>
     <string name="prefs_data_update_success">Update completed successfully</string>
+    <string name="prefs_data_import_satellites_error">No satellites imported. Select a valid TLE/3LE (.txt) or OMM (.csv) file.</string>
+    <string name="prefs_data_import_transceivers_error">No transceivers imported. Select a valid SatNOGS (.json) file.</string>
 
-    <string name="prefs_data_sources_title">Custom data sources</string>
-    <string name="prefs_data_sources_tle_switch">Custom TLE URL</string>
-    <string name="prefs_data_sources_transceivers_switch">Custom transceivers URL</string>
+    <string name="prefs_data_sources_title">Custom sources</string>
+    <string name="prefs_data_sources_tle_switch">TLE URL</string>
+    <string name="prefs_data_sources_transceivers_switch">Transceivers URL</string>
     <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>
 
     <string name="prefs_data_output_title">Data output</string>
@@ -148,24 +181,17 @@
     <string name="prefs_bt_output">Bluetooth</string>
     <string name="prefs_cat_output">CAT</string>
 
-    <string name="prefs_map_title">Map settings</string>
-    <string name="prefs_map_source_osm" translatable="false">OSM</string>
-    <string name="prefs_map_source_tianditu_vector" translatable="false">天地图-矢量</string>
-    <string name="prefs_map_source_tianditu_image" translatable="false">天地图-影像</string>
-    <string name="prefs_map_tianditu_key" translatable="false">天地图密钥</string>
-    <string name="prefs_map_save_key">保存密钥</string>
-
     <!-- Radio Control -->
     <string name="nav_radiocontrol">Radio Control</string>
-    <string name="rc_settings_title">CAT Radio Control</string>
+    <string name="rc_settings_title">CAT control</string>
     <string name="rc_radio_model">Radio Model</string>
-    <string name="rc_tx_device_hint">TX Radio BT Address</string>
-    <string name="rc_rx_device_hint">RX Radio BT Address</string>
+    <string name="rc_tx_device_hint">TX BT address</string>
+    <string name="rc_rx_device_hint">RX BT address</string>
     <string name="rc_tx_name_hint">TX Radio Name</string>
     <string name="rc_rx_name_hint">RX Radio Name</string>
-    <string name="rc_enable_switch">Enable CAT Control</string>
+    <string name="rc_enable_switch">Enable CAT</string>
 
-    <string name="prefs_net_title">Network data output</string>
+    <string name="prefs_net_title">Network output</string>
     <string name="prefs_net_rotator_switch">Enable rotation output</string>
     <string name="prefs_net_rotator_address_hint">IP:Port</string>
     <string name="prefs_net_rotator_format_hint">Format</string>
@@ -173,22 +199,29 @@
     <string name="prefs_net_frequency_address_hint">IP:Port</string>
     <string name="prefs_net_frequency_format_hint">Format</string>
 
-    <string name="prefs_bt_title">Bluetooth data output</string>
+    <string name="prefs_bt_title">Bluetooth output</string>
     <string name="prefs_bt_rotator_switch">Enable rotation output</string>
-    <string name="prefs_bt_rotator_device_hint">Device id</string>
-    <string name="prefs_bt_rotator_output_hint">Data format</string>
+    <string name="prefs_bt_rotator_device_hint">Device ID</string>
+    <string name="prefs_bt_rotator_output_hint">Format</string>
     <string name="prefs_bt_frequency_switch">Enable frequency output</string>
-    <string name="prefs_bt_frequency_device_hint">Device id</string>
-    <string name="prefs_bt_frequency_output_hint">Data format</string>
+    <string name="prefs_bt_frequency_device_hint">Device ID</string>
+    <string name="prefs_bt_frequency_output_hint">Format</string>
     <string name="prefs_bt_perm_error">Check your bluetooth permission</string>
     <string name="prefs_net_perm_error">Check your network permission</string>
 
-    <string name="prefs_other_title">Other settings</string>
-    <string name="prefs_other_switch_utc">Show pass time in UTC</string>
-    <string name="prefs_other_switch_update">Enable automatic data update</string>
-    <string name="prefs_other_switch_sweep">Enable radar sweep animation</string>
-    <string name="prefs_other_switch_sensors">Use sensors to rotate radar view</string>
-    <string name="prefs_other_switch_night_mode">Enable red night mode filter</string>
+    <string name="prefs_other_title">Other</string>
+    <string name="prefs_other_switch_utc">UTC time</string>
+    <string name="prefs_other_switch_update">Auto-update data</string>
+    <string name="prefs_other_switch_sweep">Radar sweep</string>
+    <string name="prefs_other_switch_sensors">Use sensors</string>
+    <string name="prefs_other_switch_night_mode">Night filter</string>
+    <string name="prefs_other_compass_offset">Radar compass offset</string>
+    <string name="prefs_other_compass_offset_elev">Radar compass offset (elev)</string>
+
+    <string name="prefs_highlight_title">Elevation highlight</string>
+    <string name="prefs_highlight_low">Low &lt; %1$d°</string>
+    <string name="prefs_highlight_mid">Mid %1$d–%2$d°</string>
+    <string name="prefs_highlight_high">High &gt; %1$d°</string>
 
     <string name="prefs_outro_title">I would like to say thanks to</string>
     <string name="prefs_outro_thanks" translatable="false">

fastlane/metadata/android/en-US/changelogs/default.txt

@@ -1,2 +1,8 @@
-* Added required tweaks to support Android 17 (API 37)
-* Added ACCESS_LOCAL_NETWORK permission check to support network data output
+* Added ARISS source, tweaked SSTV sensitivity #225
+* Implemented AOS window and elev filter #226
+* Added cleartext traffic support for TLEs #227
+* Fixed OMM import, tweaked error messages #228
+* Added support for Icom CAT by ruilvo #229
+* Added tweakable Radar offset by qwqtoday #230
+* Localized date/time formats by atsunatsu #231
+* Added linear radio Doppler calc by atsunatsu #232

feature/map/src/main/java/com/rtbishop/look4sat/feature/map/MapNightOverlay.kt

@@ -0,0 +1,152 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.feature.map
+
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import android.graphics.RectF
+import org.osmdroid.views.MapView
+import org.osmdroid.views.overlay.Overlay
+import kotlin.math.cos
+import kotlin.math.sin
+
+/**
+ * Custom osmdroid overlay that shades the night side of the globe.
+ *
+ * Works entirely in screen-pixel space: for each vertical strip on screen it
+ * asks osmdroid for the geographic coordinate, then tests whether that point is
+ * in the night half-sphere relative to the sub-solar point.  Because the
+ * computation happens during draw() the result is always correct regardless
+ * of zoom level or map scroll position — no polygon winding issues possible.
+ *
+ * A point (latRad, lonRad) is in night when the angle to the sub-solar point
+ * exceeds 90°, i.e. the dot product of the two unit vectors is negative:
+ *   dot = sin(lat)*sin(sunLat) + cos(lat)*cos(sunLat)*cos(lon - sunLon) < 0
+ *
+ * Performance: we sample one column per [stepPx] pixels (default 4) and draw
+ * filled vertical rectangles.  On a 1080-wide screen this means ~270 trig
+ * evaluations per row, which is imperceptible.
+ */
+class MapNightOverlay : Overlay() {
+
+    /** Sub-solar latitude in degrees. */
+    var sunLatDeg: Double = 0.0
+
+    /** Sub-solar longitude in degrees. */
+    var sunLonDeg: Double = 0.0
+
+    private val nightPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+        style = Paint.Style.FILL
+        color = Color.argb(75, 0, 0, 0)
+    }
+
+    private val rect = RectF()
+
+    override fun draw(canvas: Canvas, mapView: MapView, shadow: Boolean) {
+        if (shadow) return
+
+        val proj = mapView.projection
+        val sunLatRad = Math.toRadians(sunLatDeg)
+        val sunLonRad = Math.toRadians(sunLonDeg)
+        val sinSunLat = sin(sunLatRad)
+        val cosSunLat = cos(sunLatRad)
+
+        val w = mapView.width
+        val h = mapView.height
+        val stepPx = 4 // sample every N pixels — balance quality vs CPU
+
+        // We scan column by column. For each column we determine the longitude,
+        // then find the latitude range that is in night and shade it.
+        // Since longitude is constant along a vertical strip and the day/night
+        // boundary at a given longitude is at most two latitudes, we can do a
+        // scan-line fill efficiently.
+
+        var x = 0
+        while (x < w) {
+            // Get the geographic coordinate at the top and bottom of this column.
+            val geoTop = proj.fromPixels(x, 0) ?: run { x += stepPx; continue }
+            val geoBot = proj.fromPixels(x, h - 1) ?: run { x += stepPx; continue }
+
+            val lonRad = Math.toRadians(geoTop.longitude)
+            val cosLonDiff = cos(lonRad - sunLonRad)
+
+            // Top pixel geographic lat
+            val latTopRad = Math.toRadians(geoTop.latitude)
+            // Bottom pixel geographic lat (osmdroid: y=0 is top of screen, higher y = lower lat)
+            val latBotRad = Math.toRadians(geoBot.latitude)
+
+            // dot(sunVec, pointVec) < 0 → night
+            // dot = sin(lat)*sinSunLat + cos(lat)*cosSunLat*cosLonDiff
+            val dotTop = sin(latTopRad) * sinSunLat + cos(latTopRad) * cosSunLat * cosLonDiff
+            val dotBot = sin(latBotRad) * sinSunLat + cos(latBotRad) * cosSunLat * cosLonDiff
+
+            when {
+                dotTop < 0 && dotBot < 0 -> {
+                    // Entire column is night — shade from top to bottom
+                    rect.set(x.toFloat(), 0f, (x + stepPx).toFloat(), h.toFloat())
+                    canvas.drawRect(rect, nightPaint)
+                }
+
+                dotTop >= 0 && dotBot >= 0 -> {
+                    // Entire column is day — nothing to draw
+                }
+
+                else -> {
+                    // Terminator crosses this column — find the crossing pixel by binary search
+                    val crossY = findCrossingY(proj, x, 0, h - 1, sinSunLat, cosSunLat, cosLonDiff)
+                    if (dotTop < 0) {
+                        // Night at top, day at bottom
+                        rect.set(x.toFloat(), 0f, (x + stepPx).toFloat(), crossY.toFloat())
+                        canvas.drawRect(rect, nightPaint)
+                    } else {
+                        // Day at top, night at bottom
+                        rect.set(x.toFloat(), crossY.toFloat(), (x + stepPx).toFloat(), h.toFloat())
+                        canvas.drawRect(rect, nightPaint)
+                    }
+                }
+            }
+            x += stepPx
+        }
+    }
+
+    /**
+     * Binary-search for the pixel row where the day/night boundary crosses column [x].
+     * [yTop] is in day, [yBot] is in night (or vice versa).
+     */
+    private fun findCrossingY(
+        proj: org.osmdroid.views.Projection,
+        x: Int,
+        yTop: Int,
+        yBot: Int,
+        sinSunLat: Double,
+        cosSunLat: Double,
+        cosLonDiff: Double
+    ): Int {
+        var lo = yTop
+        var hi = yBot
+        while (hi - lo > 1) {
+            val mid = (lo + hi) / 2
+            val geo = proj.fromPixels(x, mid) ?: return mid
+            val latRad = Math.toRadians(geo.latitude)
+            val dot = sin(latRad) * sinSunLat + cos(latRad) * cosSunLat * cosLonDiff
+            if (dot < 0) hi = mid else lo = mid
+        }
+        return (lo + hi) / 2
+    }
+}

feature/map/src/main/java/com/rtbishop/look4sat/feature/map/MapScreen.kt

@@ -60,7 +60,6 @@ import androidx.lifecycle.LifecycleEventObserver
 import androidx.lifecycle.compose.LocalLifecycleOwner
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
-import com.rtbishop.look4sat.core.domain.model.MapSource
 import com.rtbishop.look4sat.core.domain.predict.GeoPos
 import com.rtbishop.look4sat.core.domain.predict.OrbitalObject
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
@@ -72,56 +71,37 @@ import com.rtbishop.look4sat.core.presentation.TimerRow
 import com.rtbishop.look4sat.core.presentation.TopBar
 import com.rtbishop.look4sat.core.presentation.isVerticalLayout
 import com.rtbishop.look4sat.core.presentation.layoutPadding
-import org.osmdroid.config.Configuration
-import org.osmdroid.tileprovider.MapTileProviderBasic
-import org.osmdroid.tileprovider.tilesource.OnlineTileSourceBase
-import org.osmdroid.tileprovider.tilesource.TileSourceFactory
 import org.osmdroid.tileprovider.tilesource.XYTileSource
 import org.osmdroid.util.GeoPoint
-import org.osmdroid.util.MapTileIndex
 import org.osmdroid.views.CustomZoomButtonsController
 import org.osmdroid.views.MapView
 import org.osmdroid.views.overlay.FolderOverlay
 import org.osmdroid.views.overlay.Marker
 import org.osmdroid.views.overlay.Polyline
-import org.osmdroid.views.overlay.TilesOverlay
-import java.io.File
-import java.net.URLEncoder
 
 // Overlay indices
-private const val OVERLAY_TDT_LABELS = 0
-private const val OVERLAY_STATION = 1
-private const val OVERLAY_TRACK = 2
-private const val OVERLAY_FOOTPRINT = 3
-private const val OVERLAY_POSITIONS = 4
+private const val OVERLAY_STATION = 0
+private const val OVERLAY_TRACK = 1
+private const val OVERLAY_FOOTPRINT = 2
+private const val OVERLAY_POSITIONS = 3
+private const val OVERLAY_TERMINATOR = 4
 private const val OVERLAY_SUN = 5
 private const val OVERLAY_MOON = 6
 private const val OVERLAY_COUNT = 7
 
 private val minLat = MapView.getTileSystem().minLatitude
 private val maxLat = MapView.getTileSystem().maxLatitude
-private val offlineTileSource = XYTileSource("tiles", 0, 6, 256, ".webp", emptyArray<String>())
-private const val OFFLINE_MAX_ZOOM = 7.0
-private const val OSM_MAX_ZOOM = 19.0
-private const val TIANDITU_MAX_ZOOM = 18.0
-private const val TILE_CACHE_MAX_BYTES = 1024L * 1024L * 1024L
-private const val TILE_CACHE_TRIM_BYTES = 900L * 1024L * 1024L
-private const val TILE_REFRESH_DELAY_MS = 250L
-private const val TILE_SOURCE_OSM = "osm"
-private const val TILE_USER_AGENT = "Look4Sat-CNMap"
 private val trackPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
-    strokeWidth = 4f
+    strokeWidth = 3f
     style = Paint.Style.STROKE
-    color = "#1565C0".toColorInt()
+    color = Color.RED
     strokeCap = Paint.Cap.ROUND
     strokeJoin = Paint.Join.ROUND
 }
-private val footprintOutlinePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
-    strokeWidth = 4f
-    style = Paint.Style.STROKE
-    color = "#00897B".toColorInt()
-    strokeCap = Paint.Cap.ROUND
-    strokeJoin = Paint.Join.ROUND
+private val footprintPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+    strokeWidth = 3f
+    style = Paint.Style.FILL_AND_STROKE
+    color = "#FFE082".toColorInt()
 }
 private val textPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
     textSize = 36f
@@ -154,17 +134,11 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
     val rotateMod = Modifier.rotate(180f)
     val timeString = uiState.mapData?.aosTime ?: "00:00:00"
     val isTimeAos = uiState.mapData?.isTimeAos ?: true
-    val usesTianditu = tiandituLayers(uiState.mapSource) != null && uiState.tiandituKey.isNotBlank()
-    val copyrightResId = if (usesTianditu) R.string.map_copyright_tianditu
-    else R.string.map_copyright_osm
 
     LaunchedEffect(uiState.track) {
         val firstPos = uiState.track?.firstOrNull()?.firstOrNull() ?: return@LaunchedEffect
         mapView.controller.animateTo(GeoPoint(firstPos.latitude, firstPos.longitude))
     }
-    LaunchedEffect(uiState.mapSource, uiState.tiandituKey) {
-        configureTileSources(mapView, uiState.mapSource, uiState.tiandituKey)
-    }
     Column(modifier = Modifier.layoutPadding(), verticalArrangement = Arrangement.spacedBy(6.dp)) {
         val isVertical = isVerticalLayout()
         if (isVertical) {
@@ -189,12 +163,13 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
                     uiState.track?.let { setSatelliteTrack(it, view) }
                     uiState.footprint?.let { setFootprint(it, view) }
                     uiState.positions?.let { setPositions(it, view) { item -> onAction(MapAction.SelectItem(item)) } }
+                    setTerminator(uiState.sunLatDeg, uiState.sunLonDeg, view)
                     setSubSolarPoint(uiState.sunLatDeg, uiState.sunLonDeg, view)
                     setMoonPosition(uiState.moonLatDeg, uiState.moonLonDeg, view)
                     view.invalidate()
                 }
                 uiState.mapData?.let { mapData ->
-                    if (isVertical) MapDataCard(mapData, copyrightResId) else MapDataCards(mapData, copyrightResId)
+                    if (isVertical) MapDataCard(mapData) else MapDataCards(mapData)
                 }
             }
         }
@@ -203,11 +178,11 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
 
 // region Map data composables
 @Composable
-private fun MapDataCard(data: MapData, copyrightResId: Int) {
+private fun MapDataCard(data: MapData) {
     val textColor = MaterialTheme.colorScheme.primary
     val cardColors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceContainerLowest)
     Column(horizontalAlignment = Alignment.CenterHorizontally) {
-        Text(text = stringResource(copyrightResId), fontSize = 14.sp)
+        Text(text = stringResource(R.string.map_copyright), fontSize = 14.sp)
         Card(colors = cardColors) {
             Column(modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp)) {
                 MapDataRow(
@@ -245,7 +220,7 @@ private fun MapDataRow(
 }
 
 @Composable
-private fun MapDataCards(data: MapData, copyrightResId: Int) {
+private fun MapDataCards(data: MapData) {
     val cardColors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceContainerLowest)
     val paddingMod = Modifier
         .padding(horizontal = 8.dp, vertical = 4.dp)
@@ -271,7 +246,7 @@ private fun MapDataCards(data: MapData, copyrightResId: Int) {
             }
         }
         Text(
-            text = stringResource(copyrightResId),
+            text = stringResource(R.string.map_copyright),
             fontSize = 14.sp,
             modifier = Modifier.align(Alignment.BottomCenter)
         )
@@ -285,114 +260,6 @@ private fun MapDataCards(data: MapData, copyrightResId: Int) {
 }
 // endregion
 
-// region Tile sources
-private var configuredTileMapView: MapView? = null
-private var configuredTileSource: String? = null
-
-private fun configureTileSources(mapView: MapView, mapSource: String, tiandituKey: String) {
-    val key = tiandituKey.trim()
-    val layers = tiandituLayers(mapSource)
-    val tileSourceKey = if (layers == null || key.isBlank()) {
-        TILE_SOURCE_OSM
-    } else {
-        "tianditu:${layers.base}:${layers.label}:$key"
-    }
-    if (configuredTileMapView === mapView && configuredTileSource == tileSourceKey) {
-        requestTileRefresh(mapView)
-        return
-    }
-    configuredTileMapView = mapView
-    configuredTileSource = tileSourceKey
-
-    if (layers == null || key.isBlank()) {
-        mapView.setUseDataConnection(true)
-        mapView.setTileProvider(MapTileProviderBasic(mapView.context, TileSourceFactory.MAPNIK))
-        mapView.maxZoomLevel = OSM_MAX_ZOOM
-        mapView.overlayManager.tilesOverlay.applyTileOverlayDefaults()
-        mapView.overlays[OVERLAY_TDT_LABELS] = FolderOverlay()
-        requestTileRefresh(mapView)
-        return
-    }
-    mapView.setUseDataConnection(true)
-    mapView.setTileProvider(MapTileProviderBasic(mapView.context, TiandituTileSource(layer = layers.base, key = key)))
-    mapView.maxZoomLevel = TIANDITU_MAX_ZOOM
-    mapView.overlayManager.tilesOverlay.applyTileOverlayDefaults()
-    mapView.overlays[OVERLAY_TDT_LABELS] = TilesOverlay(
-        MapTileProviderBasic(mapView.context, TiandituTileSource(layer = layers.label, key = key)),
-        mapView.context
-    ).apply {
-        applyTileOverlayDefaults()
-        setUseDataConnection(true)
-    }
-    requestTileRefresh(mapView)
-}
-
-private data class TiandituLayers(val base: String, val label: String)
-
-private fun tiandituLayers(mapSource: String): TiandituLayers? = when (MapSource.normalize(mapSource)) {
-    MapSource.TIANDITU_VECTOR -> TiandituLayers(base = "vec", label = "cva")
-    MapSource.TIANDITU_IMAGE -> TiandituLayers(base = "img", label = "cia")
-    else -> null
-}
-
-private fun TilesOverlay.applyTileOverlayDefaults() {
-    setColorFilter(null)
-    setLoadingBackgroundColor(Color.TRANSPARENT)
-    setLoadingLineColor(Color.TRANSPARENT)
-}
-
-private fun requestTileRefresh(mapView: MapView) {
-    mapView.post {
-        mapView.requestLayout()
-        mapView.invalidate()
-        mapView.postInvalidate()
-    }
-    mapView.postDelayed({
-        mapView.invalidate()
-        mapView.postInvalidate()
-    }, TILE_REFRESH_DELAY_MS)
-}
-
-private fun buildTiandituWmtsUrl(
-    baseUrl: String,
-    layer: String,
-    zoom: Int,
-    row: Int,
-    col: Int,
-    encodedKey: String
-): String = "$baseUrl?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=$layer" +
-    "&STYLE=default&TILEMATRIXSET=w&FORMAT=tiles&TILEMATRIX=$zoom&TILEROW=$row&TILECOL=$col&tk=$encodedKey"
-
-private class TiandituTileSource(
-    private val layer: String,
-    private val key: String
-) : OnlineTileSourceBase(
-    "tianditu-wmts-https-$layer",
-    1,
-    18,
-    256,
-    ".png",
-    Array(8) { index -> "https://t$index.tianditu.gov.cn/${layer}_w/wmts" },
-    "Tianditu"
-) {
-    private val encodedKey = URLEncoder.encode(key, Charsets.UTF_8.name())
-
-    override fun getTileURLString(pMapTileIndex: Long): String {
-        val zoom = MapTileIndex.getZoom(pMapTileIndex)
-        val row = MapTileIndex.getY(pMapTileIndex)
-        val col = MapTileIndex.getX(pMapTileIndex)
-        return buildTiandituWmtsUrl(
-            baseUrl = getBaseUrl(),
-            layer = layer,
-            zoom = zoom,
-            row = row,
-            col = col,
-            encodedKey = encodedKey
-        )
-    }
-}
-// endregion
-
 // region Map overlay helpers
 private fun setStationPosition(stationPos: GeoPos, mapView: MapView) {
     try {
@@ -415,8 +282,6 @@ private fun setStationPosition(stationPos: GeoPos, mapView: MapView) {
 /** Pool of reusable Marker objects keyed by satellite name, to avoid re-creation every frame */
 private val markerPool = HashMap<String, Marker>()
 private var lastMapView: MapView? = null
-private var lastSatelliteTrack: List<List<GeoPos>>? = null
-private var satelliteTrackOverlay: FolderOverlay? = null
 
 private fun setPositions(
     posMap: Map<OrbitalObject, GeoPos>,
@@ -429,9 +294,8 @@ private fun setPositions(
             lastMapView = mapView
             markerPool.clear()
             iconCache.evictAll()
-            lastSatelliteTrack = null
-            satelliteTrackOverlay = null
-            footprintOverlay = null
+            footprintPolyline = null
+            footprintPoints = null
         }
         // Reuse the existing FolderOverlay — creating a new one and replacing it
         // causes osmdroid to detach shared Marker objects, making them invisible.
@@ -493,10 +357,6 @@ private fun getCachedTextIcon(name: String, mapView: MapView): Drawable {
 }
 
 private fun setSatelliteTrack(satTrack: List<List<GeoPos>>, mapView: MapView) {
-    val cachedOverlay = satelliteTrackOverlay
-    if (lastSatelliteTrack === satTrack && cachedOverlay != null && mapView.overlays[OVERLAY_TRACK] === cachedOverlay) {
-        return
-    }
     val trackOverlay = FolderOverlay()
     try {
         satTrack.forEach { track ->
@@ -506,76 +366,61 @@ private fun setSatelliteTrack(satTrack: List<List<GeoPos>>, mapView: MapView) {
                 trackOverlay.add(this)
             }
         }
-        lastSatelliteTrack = satTrack
-        satelliteTrackOverlay = trackOverlay
         mapView.overlays[OVERLAY_TRACK] = trackOverlay
     } catch (e: Exception) {
         println(e)
     }
 }
 
-/** Reusable footprint overlay - split at the date line so wrapped maps don't drop the circle. */
-private var footprintOverlay: FolderOverlay? = null
+/** Reusable footprint Polyline — created once, points updated in-place each frame */
+private var footprintPolyline: Polyline? = null
+private var footprintPoints: ArrayList<GeoPoint>? = null
 
 private fun setFootprint(orbitalPos: OrbitalPos, mapView: MapView) {
     try {
         val rangeCircle = orbitalPos.getRangeCircle()
-        val overlay = footprintOverlay ?: FolderOverlay().also { footprintOverlay = it }
-        overlay.items.clear()
-        splitClosedPathOnDateLine(rangeCircle).forEach { segment ->
-            if (segment.size > 1) {
-                overlay.add(
-                    Polyline().apply {
-                        setPoints(segment.map { GeoPoint(it.latitude, it.longitude) })
-                        outlinePaint.set(footprintOutlinePaint)
-                    }
-                )
+        var pts = footprintPoints
+        if (pts == null || pts.size != rangeCircle.size) {
+            pts = ArrayList(rangeCircle.size)
+            for (gp in rangeCircle) pts.add(GeoPoint(gp.latitude, gp.longitude))
+            footprintPoints = pts
+        } else {
+            for (i in rangeCircle.indices) {
+                pts[i].latitude = rangeCircle[i].latitude
+                pts[i].longitude = rangeCircle[i].longitude
             }
         }
-        mapView.overlays[OVERLAY_FOOTPRINT] = overlay
+        val polyline = footprintPolyline ?: Polyline().apply {
+            outlinePaint.set(footprintPaint)
+            footprintPolyline = this
+        }
+        polyline.setPoints(pts)
+        mapView.overlays[OVERLAY_FOOTPRINT] = polyline
     } catch (e: Exception) {
         println(e)
     }
 }
 
-private fun splitClosedPathOnDateLine(points: List<GeoPos>): List<List<GeoPos>> {
-    if (points.isEmpty()) return emptyList()
-    val segments = mutableListOf<List<GeoPos>>()
-    val segment = mutableListOf<GeoPos>()
-    var previous = points.first()
-    segment.add(previous)
-    (points.drop(1) + points.first()).forEach { current ->
-        when {
-            previous.longitude < -170.0 && current.longitude > 170.0 -> {
-                val edgeLatitude = getDateLineLatitude(previous, current, -180.0)
-                segment.add(GeoPos(edgeLatitude, -180.0))
-                segments.add(segment.toList())
-                segment.clear()
-                segment.add(GeoPos(edgeLatitude, 180.0))
-            }
-            previous.longitude > 170.0 && current.longitude < -170.0 -> {
-                val edgeLatitude = getDateLineLatitude(previous, current, 180.0)
-                segment.add(GeoPos(edgeLatitude, 180.0))
-                segments.add(segment.toList())
-                segment.clear()
-                segment.add(GeoPos(edgeLatitude, -180.0))
+/**
+ * Update the NightOverlay with the current sub-solar position.
+ * The overlay is created once and kept in OVERLAY_TERMINATOR; only its
+ * sunLatDeg/sunLonDeg fields are updated each tick so osmdroid redraws it.
+ */
+private fun setTerminator(sunLatDeg: Double, sunLonDeg: Double, mapView: MapView) {
+    try {
+        val overlay = mapView.overlays[OVERLAY_TERMINATOR]
+        if (overlay is MapNightOverlay) {
+            overlay.sunLatDeg = sunLatDeg
+            overlay.sunLonDeg = sunLonDeg
+        } else {
+            mapView.overlays[OVERLAY_TERMINATOR] = MapNightOverlay().apply {
+                this.sunLatDeg = sunLatDeg
+                this.sunLonDeg = sunLonDeg
             }
         }
-        segment.add(current)
-        previous = current
+    } catch (e: Exception) {
+        println(e)
     }
-    if (segment.size > 1) segments.add(segment)
-    return segments
-}
-
-private fun getDateLineLatitude(previous: GeoPos, current: GeoPos, edgeLongitude: Double): Double {
-    val currentLongitude = when {
-        previous.longitude < -170.0 && current.longitude > 170.0 -> current.longitude - 360.0
-        previous.longitude > 170.0 && current.longitude < -170.0 -> current.longitude + 360.0
-        else -> current.longitude
-    }
-    val fraction = (edgeLongitude - previous.longitude) / (currentLongitude - previous.longitude)
-    return previous.latitude + (current.latitude - previous.latitude) * fraction
 }
 
 /** Place an ic_sun icon marker at the sub-solar point. */
@@ -637,62 +482,40 @@ private fun setMoonPosition(moonLatDeg: Double, moonLonDeg: Double, mapView: Map
 // region MapView lifecycle
 @Composable
 private fun rememberMapViewWithLifecycle(): MapView {
+    val tileSource = XYTileSource("tiles", 0, 6, 256, ".webp", emptyArray<String>())
     val context = LocalContext.current
     val isVertical = isVerticalLayout()
     val mapView = remember {
-        configureOsmdroidCache(context)
         MapView(context).apply {
             setMultiTouchControls(true)
             setUseDataConnection(false)
-            setTileSource(offlineTileSource)
+            setTileSource(tileSource)
             minZoomLevel = getMinZoom(resources.displayMetrics.heightPixels, isVertical)
-            maxZoomLevel = OFFLINE_MAX_ZOOM
+            maxZoomLevel = 7.0
             controller.setCenter(GeoPoint(48.8575, 6.3514))
             controller.setZoom(minZoomLevel + 2)
             zoomController.setVisibility(CustomZoomButtonsController.Visibility.NEVER)
             overlayManager.tilesOverlay.loadingBackgroundColor = Color.TRANSPARENT
             overlayManager.tilesOverlay.loadingLineColor = Color.TRANSPARENT
             overlayManager.tilesOverlay.setColorFilter(createColorFilter())
-            setHorizontalMapRepetitionEnabled(true)
-            setVerticalMapRepetitionEnabled(false)
             setScrollableAreaLimitLatitude(maxLat, minLat, 0)
             overlays.addAll(Array(OVERLAY_COUNT) { FolderOverlay() })
-            addOnFirstLayoutListener { _, _, _, _, _ -> requestTileRefresh(this) }
         }
     }
     val lifecycleObserver = rememberMapViewLifecycleObserver(mapView)
     val lifecycle = LocalLifecycleOwner.current.lifecycle
     DisposableEffect(lifecycle) {
         lifecycle.addObserver(lifecycleObserver)
-        if (lifecycle.currentState.isAtLeast(Lifecycle.State.STARTED)) {
-            mapView.onResume()
-            requestTileRefresh(mapView)
-        }
         onDispose { lifecycle.removeObserver(lifecycleObserver) }
     }
     return mapView
 }
 
-private fun configureOsmdroidCache(context: android.content.Context) {
-    val cacheRoot = File(context.filesDir, "osmdroid")
-    val tileCache = File(cacheRoot, "tiles")
-    Configuration.getInstance().apply {
-        setUserAgentValue(TILE_USER_AGENT)
-        setOsmdroidBasePath(cacheRoot)
-        setOsmdroidTileCache(tileCache)
-        setTileFileSystemCacheMaxBytes(TILE_CACHE_MAX_BYTES)
-        setTileFileSystemCacheTrimBytes(TILE_CACHE_TRIM_BYTES)
-    }
-}
-
 @Composable
 private fun rememberMapViewLifecycleObserver(mapView: MapView) = remember(mapView) {
     LifecycleEventObserver { _, event ->
         when (event) {
-            Lifecycle.Event.ON_RESUME -> {
-                mapView.onResume()
-                requestTileRefresh(mapView)
-            }
+            Lifecycle.Event.ON_RESUME -> mapView.onResume()
             Lifecycle.Event.ON_PAUSE -> mapView.onPause()
             else -> {}
         }

feature/map/src/main/java/com/rtbishop/look4sat/feature/map/MapState.kt

@@ -26,8 +26,6 @@ data class MapState(
     val mapData: MapData? = null,
     val isLightUi: Boolean = false,
     val isUtc: Boolean = false,
-    val mapSource: String = "",
-    val tiandituKey: String = "",
     val stationPosition: GeoPos? = null,
     val orbitalPass: OrbitalPass,
     val track: List<List<GeoPos>>? = null,

feature/map/src/main/java/com/rtbishop/look4sat/feature/map/MapViewModel.kt

@@ -61,8 +61,6 @@ class MapViewModel(
         MapState(
             isLightUi = settingsRepo.otherSettings.value.stateOfLightTheme,
             isUtc = settingsRepo.otherSettings.value.stateOfUtc,
-            mapSource = settingsRepo.otherSettings.value.mapSource,
-            tiandituKey = settingsRepo.otherSettings.value.tiandituKey,
             orbitalPass = defaultPass
         )
     )
@@ -76,13 +74,7 @@ class MapViewModel(
     init {
         viewModelScope.launch {
             settingsRepo.otherSettings.collectLatest { settings ->
-                _uiState.update {
-                    it.copy(
-                        isUtc = settings.stateOfUtc,
-                        mapSource = settings.mapSource,
-                        tiandituKey = settings.tiandituKey
-                    )
-                }
+                _uiState.update { it.copy(isUtc = settings.stateOfUtc) }
             }
         }
         val (selectedCatNum, _) = satelliteRepo.selectedPass.value
@@ -277,45 +269,29 @@ class MapViewModel(
         val satTracks = mutableListOf<List<GeoPos>>()
         val currentTrack = mutableListOf<GeoPos>()
         val endDate = Date(date.time + (orbitalObject.data.orbitalPeriod * 2.4 * 60000L).toLong())
-        var previousPosition: GeoPos? = null
+        var oldLongitude = 0.0
         satelliteRepo.getTrack(orbitalObject, pos, date.time, endDate.time).forEach { satPos ->
             val currentPosition = satPos.toMapGeoPos()
-            val previous = previousPosition
-            if (previous != null && previous.longitude < -170.0 && currentPosition.longitude > 170.0) {
+            if (oldLongitude < -170.0 && currentPosition.longitude > 170.0) {
                 // adding left terminal position
-                val edgeLatitude = getDateLineLatitude(previous, currentPosition)
-                currentTrack.add(GeoPos(edgeLatitude, -180.0))
+                currentTrack.add(GeoPos(currentPosition.latitude, -180.0))
                 val finishedTrack = mutableListOf<GeoPos>().apply { addAll(currentTrack) }
                 satTracks.add(finishedTrack)
                 currentTrack.clear()
-                currentTrack.add(GeoPos(edgeLatitude, 180.0))
-            } else if (previous != null && previous.longitude > 170.0 && currentPosition.longitude < -170.0) {
+            } else if (oldLongitude > 170.0 && currentPosition.longitude < -170.0) {
                 // adding right terminal position
-                val edgeLatitude = getDateLineLatitude(previous, currentPosition)
-                currentTrack.add(GeoPos(edgeLatitude, 180.0))
+                currentTrack.add(GeoPos(currentPosition.latitude, 180.0))
                 val finishedTrack = mutableListOf<GeoPos>().apply { addAll(currentTrack) }
                 satTracks.add(finishedTrack)
                 currentTrack.clear()
-                currentTrack.add(GeoPos(edgeLatitude, -180.0))
             }
-            previousPosition = currentPosition
+            oldLongitude = currentPosition.longitude
             currentTrack.add(currentPosition)
         }
         satTracks.add(currentTrack)
         _uiState.update { it.copy(track = satTracks) }
     }
 
-    private fun getDateLineLatitude(previous: GeoPos, current: GeoPos): Double {
-        val currentLon = if (previous.longitude < 0.0 && current.longitude > 0.0) {
-            current.longitude - 360.0
-        } else {
-            current.longitude + 360.0
-        }
-        val edgeLon = if (previous.longitude < 0.0) -180.0 else 180.0
-        val fraction = (edgeLon - previous.longitude) / (currentLon - previous.longitude)
-        return previous.latitude + (current.latitude - previous.latitude) * fraction
-    }
-
     companion object {
         /** Number of parallel chunks for satellite position computation */
         private const val PARALLEL_CHUNKS = 4

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesDialog.kt

@@ -21,8 +21,11 @@ import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.grid.GridCells
@@ -31,6 +34,7 @@ import androidx.compose.foundation.lazy.grid.itemsIndexed
 import androidx.compose.material3.Checkbox
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.RangeSlider
 import androidx.compose.material3.Slider
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
@@ -55,44 +59,88 @@ import com.rtbishop.look4sat.core.presentation.LocalSpacing
 import com.rtbishop.look4sat.core.presentation.MainTheme
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.SharedDialog
+import com.rtbishop.look4sat.core.presentation.ElevationHighColor
+import com.rtbishop.look4sat.core.presentation.ElevationLowColor
 import com.rtbishop.look4sat.core.presentation.elevationColor
-
-private val allModes = listOf(
-    "AFSK", "AFSK S-Net", "AFSK SALSAT", "AHRPT", "AM", "APT", "BPSK", "BPSK PMT-A3",
-    "CERTO", "CW", "DQPSK", "DSTAR", "DUV", "FFSK", "FM", "FMN", "FSK", "FSK AX.100 Mode 5",
-    "FSK AX.100 Mode 6", "FSK AX.25 G3RUH", "GFSK", "GFSK Rktr", "GMSK", "HRPT", "LoRa",
-    "LRPT", "LSB", "MFSK", "MSK", "MSK AX.100 Mode 5", "MSK AX.100 Mode 6", "OFDM", "OQPSK",
-    "PSK", "PSK31", "PSK63", "QPSK", "QPSK31", "QPSK63", "SSTV", "USB", "WSJT"
-)
+import com.rtbishop.look4sat.core.domain.source.Sources
+import kotlin.math.roundToInt
 
 private val hourSteps = listOf(1, 2, 4, 8, 12, 24, 48, 72, 96, 120, 144, 168, 192, 216, 240)
+private const val dayMinutes = 24 * 60
+private const val minuteStep = 15
+private const val endOfDayMinute = dayMinutes - 1
+private const val quarterHourSlots = dayMinutes / minuteStep
+
+data class PassFilterParams(
+    val hours: Int,
+    val elevation: Double,
+    val lowElevation: Double,
+    val highElevation: Double,
+    val aosStartMinute: Int,
+    val aosEndMinute: Int,
+    val invertAosTimeWindow: Boolean,
+    val showDeepSpace: Boolean
+)
 
 @Preview
 @Composable
 private fun PassesDialogPreview() {
-    MainTheme { PassesDialog(24, 16.0, true, {}) { _, _, _ -> } }
+    MainTheme {
+        PassesFilterDialog(
+            hours = 24,
+            elevation = 16.0,
+            lowElevation = 16.0,
+            highElevation = 65.0,
+            aosStartMinute = 0,
+            aosEndMinute = 23 * 60 + 59,
+            invertAosTimeWindow = false,
+            showDeepSpace = true,
+            cancel = {},
+            accept = {}
+        )
+    }
 }
 
 @Composable
-internal fun PassesDialog(
+internal fun PassesFilterDialog(
     hours: Int,
     elevation: Double,
+    lowElevation: Double,
+    highElevation: Double,
+    aosStartMinute: Int,
+    aosEndMinute: Int,
+    invertAosTimeWindow: Boolean,
     showDeepSpace: Boolean,
     cancel: () -> Unit,
-    accept: (Int, Double, Boolean) -> Unit
+    accept: (PassFilterParams) -> Unit
 ) {
     val hoursIndex = remember { mutableIntStateOf(hourSteps.indexOfFirst { it >= hours }.coerceAtLeast(0)) }
     val elevationValueNew = remember { mutableDoubleStateOf(elevation) }
+    val highlightBounds = 0f..90f
+    var highlightRange by remember(lowElevation, highElevation) {
+        mutableStateOf(lowElevation.toFloat()..highElevation.toFloat())
+    }
+    var aosRangeValue by remember {
+        mutableStateOf(minuteToSlot(aosStartMinute).toFloat()..minuteToSlot(aosEndMinute).toFloat())
+    }
+    var invertedAosRange by remember { mutableStateOf(invertAosTimeWindow) }
     var deepSpaceEnabled by remember { mutableStateOf(showDeepSpace) }
     val onAccept = {
-        accept(hourSteps[hoursIndex.intValue], elevationValueNew.doubleValue, deepSpaceEnabled).also { cancel() }
+        accept(
+            PassFilterParams(
+                hours = hourSteps[hoursIndex.intValue],
+                elevation = elevationValueNew.doubleValue,
+                lowElevation = highlightRange.start.roundToInt().toDouble(),
+                highElevation = highlightRange.endInclusive.roundToInt().toDouble(),
+                aosStartMinute = slotToMinute(aosRangeValue.start),
+                aosEndMinute = slotToMinute(aosRangeValue.endInclusive),
+                invertAosTimeWindow = invertedAosRange,
+                showDeepSpace = deepSpaceEnabled
+            )
+        )
+        cancel()
     }
     SharedDialog(title = stringResource(R.string.pass_filter_title), onCancel = cancel, onAccept = onAccept) {
-        ToggleRow(
-            title = stringResource(R.string.pass_filter_deep_space),
-            checked = deepSpaceEnabled,
-            onCheckedChange = { deepSpaceEnabled = it }
-        )
         SliderRow(
             title = stringResource(R.string.pass_filter_elev),
             value = elevationValueNew.doubleValue,
@@ -104,24 +152,74 @@ internal fun PassesDialog(
         SliderRow(
             title = stringResource(R.string.pass_filter_hours),
             value = hoursIndex.intValue.toDouble(),
-            displayValue = "${hourSteps[hoursIndex.intValue]}h",
+            displayValue = formatHoursLabel(hourSteps[hoursIndex.intValue]),
             valueResId = R.drawable.ic_clock,
             valueRange = 0f..(hourSteps.size - 1).toFloat(),
             steps = hourSteps.size - 2
         ) { hoursIndex.intValue = it.toInt().coerceIn(0, hourSteps.size - 1) }
+        ToggleRow(
+            title = stringResource(R.string.pass_filter_deep_space),
+            checked = deepSpaceEnabled,
+            onCheckedChange = { deepSpaceEnabled = it }
+        )
+        ElevationColorsRangeSliderRow(
+            title = stringResource(R.string.prefs_highlight_title),
+            range = highlightRange,
+            valueRange = highlightBounds
+        ) { highlightRange = it }
+        TimeRangeSliderRow(
+            title = stringResource(R.string.pass_filter_aos_time),
+            range = aosRangeValue,
+            displayValue = formatTimeRange(aosRangeValue, invertedAosRange),
+            valueResId = R.drawable.ic_clock,
+            valueRange = 0f..quarterHourSlots.toFloat(),
+        ) { aosRangeValue = it }
+        ToggleRow(
+            title = stringResource(R.string.pass_filter_invert_time),
+            checked = invertedAosRange,
+            onCheckedChange = { invertedAosRange = it }
+        )
+        Spacer(modifier = Modifier.height(0.dp))
     }
 }
 
+private fun slotToMinute(value: Float): Int {
+    val slot = value.roundToInt().coerceIn(0, quarterHourSlots)
+    return if (slot == quarterHourSlots) endOfDayMinute else slot * minuteStep
+}
+
+private fun minuteToSlot(minute: Int): Int {
+    if (minute >= endOfDayMinute) return quarterHourSlots
+    return ((minute + minuteStep / 2) / minuteStep).coerceIn(0, quarterHourSlots)
+}
+
+private fun formatMinuteOfDay(minute: Int): String {
+    val hourPart = minute / 60
+    val minutePart = minute % 60
+    return "%02d:%02d".format(hourPart, minutePart)
+}
+
+private fun formatHoursLabel(hours: Int): String {
+    if (hours < 24) return "${hours}h"
+    val days = hours / 24
+    val remainder = hours % 24
+    return if (remainder == 0) "${days}d" else "${days}d ${remainder}h"
+}
+
+private fun formatTimeRange(
+    range: ClosedFloatingPointRange<Float>,
+    inverted: Boolean
+): String {
+    val start = formatMinuteOfDay(slotToMinute(range.start))
+    val end = formatMinuteOfDay(slotToMinute(range.endInclusive))
+    return if (inverted) "$end - $start" else "$start - $end"
+}
+
 @Composable
-private fun SliderRow(
+private fun SliderSection(
     title: String,
-    value: Double,
-    displayValue: String,
-    valueResId: Int,
-    valueRange: ClosedFloatingPointRange<Float>,
-    steps: Int = 0,
-    accentColor: Color = MaterialTheme.colorScheme.primary,
-    onChange: (Float) -> Unit
+    trailingContent: @Composable () -> Unit,
+    sliderContent: @Composable () -> Unit
 ) {
     Column(
         horizontalAlignment = Alignment.CenterHorizontally,
@@ -138,6 +236,26 @@ private fun SliderRow(
                 modifier = Modifier.weight(1f),
                 color = MaterialTheme.colorScheme.onSurface
             )
+            trailingContent()
+        }
+        sliderContent()
+    }
+}
+
+@Composable
+private fun SliderRow(
+    title: String,
+    value: Double,
+    displayValue: String,
+    valueResId: Int,
+    valueRange: ClosedFloatingPointRange<Float>,
+    steps: Int = 0,
+    accentColor: Color = MaterialTheme.colorScheme.primary,
+    onChange: (Float) -> Unit
+) {
+    SliderSection(
+        title = title,
+        trailingContent = {
             Icon(
                 painter = painterResource(id = valueResId),
                 contentDescription = null,
@@ -151,10 +269,89 @@ private fun SliderRow(
                 color = accentColor
             )
         }
+    ) {
         Slider(value = value.toFloat(), onValueChange = onChange, valueRange = valueRange, steps = steps)
     }
 }
 
+@Composable
+private fun TimeRangeSliderRow(
+    title: String,
+    range: ClosedFloatingPointRange<Float>,
+    displayValue: String,
+    valueResId: Int,
+    valueRange: ClosedFloatingPointRange<Float>,
+    onChange: (ClosedFloatingPointRange<Float>) -> Unit
+) {
+    SliderSection(
+        title = title,
+        trailingContent = {
+            Icon(
+                painter = painterResource(id = valueResId),
+                contentDescription = null,
+                tint = MaterialTheme.colorScheme.primary,
+                modifier = Modifier.size(20.dp)
+            )
+            Text(
+                text = displayValue,
+                fontSize = 18.sp,
+                fontWeight = FontWeight.Medium,
+                color = MaterialTheme.colorScheme.primary
+            )
+        }
+    ) {
+        RangeSlider(
+            value = range,
+            onValueChange = { onChange(it.start..it.endInclusive) },
+            valueRange = valueRange,
+            steps = 0,
+            modifier = Modifier.fillMaxWidth()
+        )
+    }
+}
+
+@Composable
+private fun ElevationColorsRangeSliderRow(
+    title: String,
+    range: ClosedFloatingPointRange<Float>,
+    valueRange: ClosedFloatingPointRange<Float>,
+    onChange: (ClosedFloatingPointRange<Float>) -> Unit
+) {
+    val low = range.start.roundToInt()
+    val high = range.endInclusive.roundToInt()
+    SliderSection(
+        title = title,
+        trailingContent = {
+            Text(
+                text = "$low°",
+                fontSize = 18.sp,
+                fontWeight = FontWeight.Medium,
+                color = ElevationLowColor
+            )
+            Text(
+                text = "..",
+                fontSize = 18.sp,
+                fontWeight = FontWeight.Medium,
+                color = MaterialTheme.colorScheme.primary
+            )
+            Text(
+                text = "$high°",
+                fontSize = 18.sp,
+                fontWeight = FontWeight.Medium,
+                color = ElevationHighColor
+            )
+        }
+    ) {
+        RangeSlider(
+            value = range,
+            onValueChange = { onChange(it.start..it.endInclusive) },
+            valueRange = valueRange,
+            steps = 0,
+            modifier = Modifier.fillMaxWidth()
+        )
+    }
+}
+
 @Preview(showBackground = true)
 @Composable
 private fun RadiosDialogPreview() {
@@ -177,7 +374,7 @@ internal fun RadiosDialog(modes: List<String>, cancel: () -> Unit, accept: (List
             horizontalArrangement = Arrangement.spacedBy(1.dp),
             verticalArrangement = Arrangement.spacedBy(1.dp)
         ) {
-            itemsIndexed(allModes) { index, item ->
+            itemsIndexed(Sources.satelliteModes) { index, item ->
                 Row(
                     verticalAlignment = Alignment.CenterVertically,
                     modifier = Modifier

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesScreen.kt

@@ -30,6 +30,7 @@ import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
@@ -67,11 +68,11 @@ import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.presentation.EmptyListCard
 import com.rtbishop.look4sat.core.presentation.IconCard
-import com.rtbishop.look4sat.core.presentation.InfoDialog
 import com.rtbishop.look4sat.core.presentation.MainTheme
 import com.rtbishop.look4sat.core.presentation.NextPassRow
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.ScreenColumn
+import com.rtbishop.look4sat.core.presentation.SharedDialog
 import com.rtbishop.look4sat.core.presentation.SwipeableItem
 import com.rtbishop.look4sat.core.presentation.TimerRow
 import com.rtbishop.look4sat.core.presentation.TopBar
@@ -99,14 +100,31 @@ private fun PassesScreen(
     navigateToRadar: (Int, Long) -> Unit
 ) {
     if (uiState.isPassesDialogShown) {
-        PassesDialog(
+        PassesFilterDialog(
             hours = uiState.hours,
             elevation = uiState.elevation,
+            lowElevation = uiState.lowElevation,
+            highElevation = uiState.highElevation,
+            aosStartMinute = uiState.aosStartMinute,
+            aosEndMinute = uiState.aosEndMinute,
+            invertAosTimeWindow = uiState.invertAosTimeWindow,
             showDeepSpace = uiState.showDeepSpace,
-            cancel = { onAction(PassesAction.TogglePassesDialog) }
-        ) { hours, elevation, showDeepSpace ->
-            onAction(PassesAction.FilterPasses(hours, elevation, showDeepSpace))
-        }
+            cancel = { onAction(PassesAction.TogglePassesDialog) },
+            accept = { params ->
+                onAction(
+                    PassesAction.FilterPasses(
+                        hoursAhead = params.hours,
+                        minElevation = params.elevation,
+                        lowElevation = params.lowElevation,
+                        highElevation = params.highElevation,
+                        aosStartMinute = params.aosStartMinute,
+                        aosEndMinute = params.aosEndMinute,
+                        invertAosTimeWindow = params.invertAosTimeWindow,
+                        showDeepSpace = params.showDeepSpace
+                    )
+                )
+            }
+        )
     }
     if (uiState.isRadiosDialogShown) {
         RadiosDialog(
@@ -117,11 +135,20 @@ private fun PassesScreen(
         }
     }
     if (uiState.shouldSeeWhatsNew) {
-        InfoDialog(
+        val dismiss = { onAction(PassesAction.DismissWhatsNew) }
+        SharedDialog(
             title = stringResource(R.string.pass_whatsnew_title),
-            text = stringResource(R.string.pass_whatsnew_message)
-        ) {
-            onAction(PassesAction.DismissWhatsNew)
+            onDismissRequest = dismiss,
+            onAccept = dismiss,
+            titleFontSize = 18
+        ) { padding ->
+            Text(
+                text = stringResource(R.string.pass_whatsnew_message),
+                fontSize = 16.sp,
+                color = MaterialTheme.colorScheme.onSurface,
+                modifier = Modifier.padding(horizontal = padding)
+            )
+            Spacer(modifier = Modifier.height(0.dp))
         }
     }
     ScreenColumn(
@@ -129,7 +156,7 @@ private fun PassesScreen(
             TopBar(
                 isVerticalLayout = isVerticalLayout,
                 startAction = {
-                    IconCard(action = { onAction(PassesAction.TogglePassesDialog) }, resId = R.drawable.ic_filter)
+                    IconCard(action = { onAction(PassesAction.ToggleRadiosDialog) }, resId = R.drawable.ic_radios)
                 },
                 topInfo = {
                     TimerRow(timeString = uiState.nextTime, isTimeAos = uiState.isNextTimeAos)
@@ -138,7 +165,7 @@ private fun PassesScreen(
                     NextPassRow(pass = uiState.nextPass, isUtc = uiState.isUtc)
                 },
                 endAction = {
-                    IconCard(action = { onAction(PassesAction.ToggleRadiosDialog) }, resId = R.drawable.ic_radios)
+                    IconCard(action = { onAction(PassesAction.TogglePassesDialog) }, resId = R.drawable.ic_filter)
                 }
             )
         }
@@ -265,6 +292,11 @@ private fun StickyDateHeader(label: String, sunriseTime: String, sunsetTime: Str
     }
 }
 
+private fun displayLocale(): Locale {
+    val locale = Locale.getDefault()
+    return if (locale.language == Locale.CHINESE.language) locale else Locale.ENGLISH
+}
+
 @Preview(showBackground = true)
 @Composable
 private fun DeepSpacePassPreview() {
@@ -297,7 +329,7 @@ private fun PassItem(
         if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
     }
     val sdfTime = remember(isUtc) {
-        SimpleDateFormat("HH:mm:ss", Locale.ENGLISH).also { it.timeZone = timeZone }
+        SimpleDateFormat("HH:mm:ss", displayLocale()).also { it.timeZone = timeZone }
     }
     val aosTimeStr = remember(pass.aosTime, isUtc) { sdfTime.format(Date(pass.aosTime)) }
     val losTimeStr = remember(pass.losTime, isUtc) { sdfTime.format(Date(pass.losTime)) }

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesState.kt

@@ -29,6 +29,11 @@ data class PassesState(
     val isNextTimeAos: Boolean = true,
     val hours: Int = 24,
     val elevation: Double = 16.0,
+    val lowElevation: Double = 16.0,
+    val highElevation: Double = 65.0,
+    val aosStartMinute: Int = 0,
+    val aosEndMinute: Int = 23 * 60 + 59,
+    val invertAosTimeWindow: Boolean = false,
     val showDeepSpace: Boolean = true,
     val modes: List<String> = emptyList(),
     val itemsList: List<OrbitalPass> = emptyList(),
@@ -40,7 +45,16 @@ data class PassesState(
 
 sealed interface PassesAction {
     data object DismissWhatsNew : PassesAction
-    data class FilterPasses(val hoursAhead: Int, val minElevation: Double, val showDeepSpace: Boolean) : PassesAction
+    data class FilterPasses(
+        val hoursAhead: Int,
+        val minElevation: Double,
+        val lowElevation: Double,
+        val highElevation: Double,
+        val aosStartMinute: Int,
+        val aosEndMinute: Int,
+        val invertAosTimeWindow: Boolean,
+        val showDeepSpace: Boolean
+    ) : PassesAction
     data class FilterRadios(val modes: List<String>) : PassesAction
     data object RefreshPasses : PassesAction
     data object TogglePassesDialog : PassesAction

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesViewModel.kt

@@ -34,6 +34,9 @@ import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
@@ -41,6 +44,7 @@ import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
 import java.util.TimeZone
+import kotlin.time.Duration.Companion.milliseconds
 
 class PassesViewModel(
     private val satelliteRepo: ISatelliteRepo,
@@ -54,8 +58,13 @@ class PassesViewModel(
             nextPass = defaultPass,
             hours = settingsRepo.passesSettings.value.hoursAhead,
             elevation = settingsRepo.passesSettings.value.minElevation,
+            lowElevation = settingsRepo.otherSettings.value.lowElevation,
+            highElevation = settingsRepo.otherSettings.value.highElevation,
+            aosStartMinute = settingsRepo.passesSettings.value.aosStartMinute,
+            aosEndMinute = settingsRepo.passesSettings.value.aosEndMinute,
+            invertAosTimeWindow = settingsRepo.passesSettings.value.invertAosTimeWindow,
             showDeepSpace = settingsRepo.passesSettings.value.showDeepSpace,
-            modes = settingsRepo.passesSettings.value.selectedModes,
+            modes = settingsRepo.selectedSatModes.value,
             shouldSeeWhatsNew = settingsRepo.otherSettings.value.shouldSeeWhatsNew
         )
     )
@@ -71,45 +80,70 @@ class PassesViewModel(
         // React to settings changes: update UTC flag and whatsNew
         viewModelScope.launch {
             settingsRepo.otherSettings.collectLatest { settings ->
-                _uiState.update { it.copy(isUtc = settings.stateOfUtc, shouldSeeWhatsNew = settings.shouldSeeWhatsNew) }
-            }
-        }
-        // Main tick loop: reacts to new passes, then ticks every second
-        viewModelScope.launch {
-            satelliteRepo.passes.collectLatest { allPasses ->
-                while (isActive) {
-                    val timeNow = System.currentTimeMillis()
-                    val isUtc = _uiState.value.isUtc
-                    val showDeepSpace = _uiState.value.showDeepSpace
-                    val filtered = allPasses
-                        .let { if (showDeepSpace) it else it.filter { pass -> !pass.isDeepSpace } }
-                    val processed = computePassProgress(filtered, timeNow)
-                    val (nextPass, nextTime, isAos) = resolveNextPass(processed, timeNow)
-                    val sunTimes = computeSunTimes(processed, isUtc)
-                    val grouped = groupPasses(processed, isUtc)
-                    _uiState.update {
-                        it.copy(
-                            itemsList = processed,
-                            groupedPasses = grouped,
-                            sunTimes = sunTimes,
-                            nextPass = nextPass,
-                            nextTime = nextTime,
-                            isNextTimeAos = isAos
-                        )
-                    }
-                    delay(1000)
+                _uiState.update {
+                    it.copy(
+                        isUtc = settings.stateOfUtc,
+                        shouldSeeWhatsNew = settings.shouldSeeWhatsNew,
+                        lowElevation = settings.lowElevation,
+                        highElevation = settings.highElevation
+                    )
                 }
             }
         }
+        viewModelScope.launch {
+            settingsRepo.selectedSatModes.collectLatest { modes ->
+                _uiState.update { it.copy(modes = modes) }
+            }
+        }
+        // Tick loop: restarts on passes change, UTC/DeepSpace changes. Grouping/sun-time
+        // computations run once per restart, progress/countdown are calculated every second.
+        viewModelScope.launch {
+            combine(
+                satelliteRepo.passes,
+                settingsRepo.otherSettings.map { it.stateOfUtc }.distinctUntilChanged(),
+                settingsRepo.passesSettings.map { it.showDeepSpace }.distinctUntilChanged()
+            ) { passes, isUtc, showDeepSpace -> Triple(passes, isUtc, showDeepSpace) }
+                .collectLatest { (allPasses, isUtc, showDeepSpace) ->
+                    val filtered = if (showDeepSpace) allPasses
+                    else allPasses.filter { !it.isDeepSpace }
+                    // Expensive: recompute sun times once per items/UTC change, not every second
+                    val sunTimes = computeSunTimes(filtered, isUtc)
+                    _uiState.update { it.copy(sunTimes = sunTimes) }
+                    while (isActive) {
+                        val timeNow = System.currentTimeMillis()
+                        val processed = computePassProgress(filtered, timeNow)
+                        val grouped = groupPasses(processed, isUtc)
+                        val (nextPass, nextTime, isAos) = resolveNextPass(processed, timeNow)
+                        _uiState.update {
+                            it.copy(
+                                itemsList = processed,
+                                groupedPasses = grouped,
+                                nextPass = nextPass,
+                                nextTime = nextTime,
+                                isNextTimeAos = isAos
+                            )
+                        }
+                        delay(1000.milliseconds)
+                    }
+                }
+        }
     }
 
     fun onAction(action: PassesAction) {
         when (action) {
             PassesAction.DismissWhatsNew -> settingsRepo.setWhatsNewDismissed()
             is PassesAction.FilterPasses ->
-                applyFilter(action.hoursAhead, action.minElevation, action.showDeepSpace, _uiState.value.modes)
-            is PassesAction.FilterRadios ->
-                applyFilter(_uiState.value.hours, _uiState.value.elevation, _uiState.value.showDeepSpace, action.modes)
+                applyFilter(
+                    hoursAhead = action.hoursAhead,
+                    minElevation = action.minElevation,
+                    lowElevation = action.lowElevation,
+                    highElevation = action.highElevation,
+                    aosStartMinute = action.aosStartMinute,
+                    aosEndMinute = action.aosEndMinute,
+                    invertAosTimeWindow = action.invertAosTimeWindow,
+                    showDeepSpace = action.showDeepSpace
+                )
+            is PassesAction.FilterRadios -> setModesFilter(action.modes)
             PassesAction.RefreshPasses -> refreshPasses()
             PassesAction.TogglePassesDialog ->
                 _uiState.update { it.copy(isPassesDialogShown = !it.isPassesDialogShown) }
@@ -120,12 +154,28 @@ class PassesViewModel(
         }
     }
 
+    private fun displayLocale(): Locale {
+        val locale = Locale.getDefault()
+        return if (locale.language == Locale.CHINESE.language) locale else Locale.ENGLISH
+    }
+
+    /** Returns the visible pass-date format. Keep non-Chinese locales identical to upstream. */
+    private fun dateFormat(tz: TimeZone): SimpleDateFormat {
+        val locale = displayLocale()
+        val pattern = if (locale.language == Locale.CHINESE.language) {
+            "yyyy'年'M'月'd'日' EEEE"
+        } else {
+            "EEE, dd MMM yyyy"
+        }
+        return SimpleDateFormat(pattern, locale).also { it.timeZone = tz }
+    }
+
     // Computes sunrise/sunset strings for each unique calendar day in the pass list, plus today for DeepSpace
     private fun computeSunTimes(passes: List<OrbitalPass>, isUtc: Boolean): Map<String, Pair<String, String>> {
         val stationPos = settingsRepo.stationPosition.value
         val tz = if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
-        val sdfDate = SimpleDateFormat("EEE, dd MMM yyyy", Locale.ENGLISH).also { it.timeZone = tz }
-        val sdfTime = SimpleDateFormat("HH:mm", Locale.ENGLISH).also { it.timeZone = tz }
+        val sdfDate = dateFormat(tz)
+        val sdfTime = SimpleDateFormat("HH:mm", displayLocale()).also { it.timeZone = tz }
         val result = LinkedHashMap<String, Pair<String, String>>()
         // DeepSpace group always shows today's sun times
         if (passes.any { it.isDeepSpace }) {
@@ -148,7 +198,7 @@ class PassesViewModel(
 
     private fun groupPasses(passes: List<OrbitalPass>, isUtc: Boolean): Map<String, List<OrbitalPass>> {
         val tz = if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
-        val sdfDate = SimpleDateFormat("EEE, dd MMM yyyy", Locale.ENGLISH).also { it.timeZone = tz }
+        val sdfDate = dateFormat(tz)
         val ordered = LinkedHashMap<String, List<OrbitalPass>>()
         val deepSpace = passes.filter { it.isDeepSpace }
         if (deepSpace.isNotEmpty()) ordered["DeepSpace (period >225min)"] = deepSpace
@@ -198,19 +248,73 @@ class PassesViewModel(
     private fun applyFilter(
         hoursAhead: Int,
         minElevation: Double,
-        showDeepSpace: Boolean,
-        modes: List<String>
+        lowElevation: Double,
+        highElevation: Double,
+        aosStartMinute: Int,
+        aosEndMinute: Int,
+        invertAosTimeWindow: Boolean,
+        showDeepSpace: Boolean
     ) = viewModelScope.launch {
-        settingsRepo.setPassesSettings(PassesSettings(showDeepSpace, hoursAhead, minElevation, modes))
+        settingsRepo.setPassesSettings(
+            PassesSettings(
+                showDeepSpace,
+                hoursAhead,
+                minElevation,
+                aosStartMinute,
+                aosEndMinute,
+                invertAosTimeWindow
+            )
+        )
+        settingsRepo.updateOtherSettings { it.copy(lowElevation = lowElevation, highElevation = highElevation) }
         _uiState.update {
-            it.copy(hours = hoursAhead, elevation = minElevation, showDeepSpace = showDeepSpace, modes = modes)
+            it.copy(
+                hours = hoursAhead,
+                elevation = minElevation,
+                lowElevation = lowElevation,
+                highElevation = highElevation,
+                aosStartMinute = aosStartMinute,
+                aosEndMinute = aosEndMinute,
+                invertAosTimeWindow = invertAosTimeWindow,
+                showDeepSpace = showDeepSpace
+            )
         }
-        satelliteRepo.calculatePasses(System.currentTimeMillis(), hoursAhead, minElevation, modes)
+        val modes = settingsRepo.selectedSatModes.value
+        satelliteRepo.calculatePasses(
+            time = System.currentTimeMillis(),
+            hoursAhead = hoursAhead,
+            minElevation = minElevation,
+            aosStartMinute = aosStartMinute,
+            aosEndMinute = aosEndMinute,
+            invertAosTimeWindow = invertAosTimeWindow,
+            modes = modes
+        )
+    }
+
+    private fun setModesFilter(modes: List<String>) = viewModelScope.launch {
+        settingsRepo.setSelectedSatModes(modes)
+        _uiState.update { it.copy(modes = modes) }
+        satelliteRepo.calculatePasses(
+            time = System.currentTimeMillis(),
+            hoursAhead = _uiState.value.hours,
+            minElevation = _uiState.value.elevation,
+            aosStartMinute = _uiState.value.aosStartMinute,
+            aosEndMinute = _uiState.value.aosEndMinute,
+            invertAosTimeWindow = _uiState.value.invertAosTimeWindow,
+            modes = modes
+        )
     }
 
     private fun refreshPasses() = viewModelScope.launch {
-        val (_, hoursAhead, minElevation, modes) = settingsRepo.passesSettings.value
-        satelliteRepo.calculatePasses(System.currentTimeMillis(), hoursAhead, minElevation, modes)
+        val settings = settingsRepo.passesSettings.value
+        satelliteRepo.calculatePasses(
+            time = System.currentTimeMillis(),
+            hoursAhead = settings.hoursAhead,
+            minElevation = settings.minElevation,
+            aosStartMinute = settings.aosStartMinute,
+            aosEndMinute = settings.aosEndMinute,
+            invertAosTimeWindow = settings.invertAosTimeWindow,
+            modes = settingsRepo.selectedSatModes.value
+        )
     }
 
     companion object {

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarScreen.kt

@@ -45,6 +45,7 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -59,6 +60,7 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
+import com.rtbishop.look4sat.core.domain.utility.DopplerFrequencyCalculator
 import com.rtbishop.look4sat.core.domain.utility.toDegrees
 import com.rtbishop.look4sat.core.presentation.EmptyListCard
 import com.rtbishop.look4sat.core.presentation.IconCard
@@ -74,6 +76,7 @@ import kotlinx.coroutines.launch
 
 private enum class RadarPage(val title: String) {
     Transceivers("Transceivers"),
+    Calculator("Calculator"),
     Sstv("SSTV")
 }
 
@@ -150,16 +153,31 @@ private fun PagerCard(
     requestMicPermission: () -> Unit,
     modifier: Modifier = Modifier
 ) {
-    val pages = RadarPage.entries
+    val hasCalculatorPage = remember(uiState.transceivers.transmitters) {
+        uiState.transceivers.transmitters.any(DopplerFrequencyCalculator::isNamedLinearTransponder)
+    }
+    val pages = remember(hasCalculatorPage) {
+        buildList {
+            add(RadarPage.Transceivers)
+            if (hasCalculatorPage) add(RadarPage.Calculator)
+            add(RadarPage.Sstv)
+        }
+    }
     val pagerState = rememberPagerState(pageCount = { pages.size })
     val coroutineScope = rememberCoroutineScope()
 
+    LaunchedEffect(pages.size) {
+        val lastPage = pages.lastIndex
+        if (pagerState.currentPage > lastPage) pagerState.scrollToPage(lastPage)
+    }
+
     ElevatedCard(modifier = modifier) {
         Column(modifier = Modifier.fillMaxSize()) {
-            PrimaryTabRow(selectedTabIndex = pagerState.currentPage) {
+            val selectedTabIndex = pagerState.currentPage.coerceIn(0, pages.lastIndex)
+            PrimaryTabRow(selectedTabIndex = selectedTabIndex) {
                 pages.forEachIndexed { index, page ->
                     Tab(
-                        selected = pagerState.currentPage == index,
+                        selected = selectedTabIndex == index,
                         onClick = { coroutineScope.launch { pagerState.animateScrollToPage(index) } },
                         text = { Text(text = page.title, maxLines = 1, overflow = TextOverflow.Ellipsis) }
                     )
@@ -176,6 +194,13 @@ private fun PagerCard(
                         radioControl = uiState.radioControl,
                         onAction = onAction
                     )
+                    RadarPage.Calculator -> CalculatorPage(
+                        transceivers = uiState.transceivers.transmitters,
+                        selectedUuid = uiState.transceivers.selectedUuid,
+                        orbitalPos = uiState.orbitalPos,
+                        onAction = onAction,
+                        calculatorOffsetKHz = uiState.calculatorOffsetKHz
+                    )
                     RadarPage.Sstv -> SstvPage(
                         sstv = uiState.sstv,
                         dopplerFrequency = uiState.transceivers.selectedFrequency?.let { formatFrequency(it) },
@@ -225,6 +250,7 @@ private fun RadarCard(uiState: RadarState, modifier: Modifier = Modifier) {
                     azimElev = uiState.orientationValues,
                     shouldShowSweep = uiState.shouldShowSweep,
                     shouldUseCompass = uiState.shouldUseCompass,
+                    shouldFlipRadar = uiState.shouldFlipRadar,
                     modifier = Modifier.align(Alignment.Center),
                     sunPosition = uiState.sunPosition,
                     moonPosition = uiState.moonPosition,

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarState.kt

@@ -22,6 +22,7 @@ import com.rtbishop.look4sat.core.domain.predict.CelestialComputer
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
 import com.rtbishop.look4sat.core.domain.sstv.SstvFrame
+import com.rtbishop.look4sat.core.domain.sstv.SstvQualityMetrics
 
 data class RadioPanelState(
     val label: String = "",
@@ -57,11 +58,13 @@ data class RadarState(
     val satTrack: List<OrbitalPos> = emptyList(),
     val shouldShowSweep: Boolean = false,
     val shouldUseCompass: Boolean = false,
+    val shouldFlipRadar: Boolean = false,
     val sunPosition: CelestialComputer.SunPosition? = null,
     val moonPosition: CelestialComputer.MoonPosition? = null,
     val transceivers: TransceiverSubState = TransceiverSubState(),
     val radioControl: RadioControlSubState = RadioControlSubState(),
-    val sstv: SstvSubState = SstvSubState()
+    val sstv: SstvSubState = SstvSubState(),
+    val calculatorOffsetKHz: String = ""
 )
 
 enum class SstvStatus { Idle, Recording }
@@ -72,7 +75,8 @@ data class SstvSubState(
     val hasPermission: Boolean = false,
     val selectedMode: String = "Auto",
     val supportedModes: List<String> = emptyList(),
-    val currentFrame: SstvFrame? = null
+    val currentFrame: SstvFrame? = null,
+    val diagnosticsMetrics: SstvQualityMetrics? = null
 )
 
 sealed interface RadarAction {
@@ -94,4 +98,7 @@ sealed interface RadarAction {
     data object SstvReset : RadarAction
     data class SstvSelectMode(val modeName: String) : RadarAction
     data class SstvPermissionResult(val granted: Boolean) : RadarAction
+
+    // Calculator actions
+    data class ChangeCalculatorOffset(val offsetKHz: String) : RadarAction
 }

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarView.kt

@@ -74,6 +74,7 @@ fun RadarViewCompose(
     azimElev: Pair<Float, Float>,
     shouldShowSweep: Boolean,
     shouldUseCompass: Boolean,
+    shouldFlipRadar: Boolean,
     modifier: Modifier = Modifier,
     sunPosition: CelestialComputer.SunPosition? = null,
     moonPosition: CelestialComputer.MoonPosition? = null,
@@ -125,7 +126,9 @@ fun RadarViewCompose(
             cachedSweepBrush = makeSweepBrush(center, primaryColor)
             cachedSweepColor = primaryColor
         }
-        rotate(if (shouldUseCompass) -azimElev.first else 0f) {
+        val baseRotation = if (shouldUseCompass) -azimElev.first else 0f
+        val rotation = if (shouldFlipRadar) baseRotation + 180f else baseRotation
+        rotate(rotation) {
             if (shouldShowSweep) cachedSweepBrush?.let { drawSweep(center, sweepDegrees, radius, it) }
             drawRadar(radius, radarColor)
             drawElevationLabels(radius, primaryColor, measurer)

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarViewModel.kt

@@ -32,6 +32,7 @@ import com.rtbishop.look4sat.core.domain.repository.IReporter
 import com.rtbishop.look4sat.core.domain.repository.ISatelliteRepo
 import com.rtbishop.look4sat.core.domain.repository.ISensorsRepo
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
+import com.rtbishop.look4sat.core.domain.sstv.LineRecoveryStrategy
 import com.rtbishop.look4sat.core.domain.sstv.SstvDecoder
 import com.rtbishop.look4sat.core.domain.usecase.IAudioCapture
 import com.rtbishop.look4sat.core.domain.usecase.IAddToCalendar
@@ -64,11 +65,14 @@ class RadarViewModel(
     private val showToast: IShowToast
 ) : ViewModel() {
 
-    private val stationPos = settingsRepo.stationPosition.value
-    private val magDeclination = sensorsRepo.getMagDeclination(stationPos)
+    private var stationPos = settingsRepo.stationPosition.value
+    private var magDeclination = sensorsRepo.getMagDeclination(stationPos)
+    private var compassOffset = settingsRepo.otherSettings.value.radarCompassOffset
+    private var compassOffsetElev = settingsRepo.otherSettings.value.radarCompassOffsetElev
     private var transponders: List<SatRadio> = emptyList()
     private var sstvDecoder: SstvDecoder? = null
     private var sstvRecordingJob: Job? = null
+    private var sensorCollectionJob: Job? = null
 
     // Celestial positions change slowly, recompute at most once per minute
     private var lastCelestialUpdateMs = 0L
@@ -87,33 +91,67 @@ class RadarViewModel(
     val uiState: StateFlow<RadarState> = _uiState
 
     init {
-        collectCompassSensor()
-        collectSettingsChanges()
+        collectSettingsChanges()  // also handles initial sensor subscription
+        collectStationPositionChanges()
         collectPassAndStartTickLoop()
         collectRadioTrackingState()
     }
 
-    private fun collectCompassSensor() {
-        if (!settingsRepo.otherSettings.value.stateOfSensors) return
-        viewModelScope.launch {
+    // Starts sensor collection if not already running.
+    private fun startSensorCollection() {
+        if (sensorCollectionJob?.isActive == true) return
+        sensorCollectionJob = viewModelScope.launch {
             sensorsRepo.enableSensor()
             sensorsRepo.sensorData.collect { data ->
-                val orientationValues = (data.first + magDeclination) to data.second
+                val orientationValues =
+                    (data.first + magDeclination + compassOffset) to (data.second + compassOffsetElev)
                 _uiState.update { it.copy(orientationValues = orientationValues) }
             }
         }
     }
 
+    // Stops sensor collection and disables the hardware sensor.
+    private fun stopSensorCollection() {
+        sensorCollectionJob?.cancel()
+        sensorCollectionJob = null
+        sensorsRepo.disableSensor()
+    }
+
     private fun collectSettingsChanges() {
         viewModelScope.launch {
-            settingsRepo.otherSettings.collectLatest { settings ->
+            settingsRepo.otherSettings.collect { settings ->
+                compassOffset = settings.radarCompassOffset
+                compassOffsetElev = settings.radarCompassOffsetElev
                 _uiState.update {
                     it.copy(
                         isUtc = settings.stateOfUtc,
                         shouldShowSweep = settings.stateOfSweep,
-                        shouldUseCompass = settings.stateOfSensors
+                        shouldUseCompass = settings.stateOfSensors,
+                        shouldFlipRadar = settings.radarCompassOffsetElev < 0f
                     )
                 }
+                // Reactively wire sensor hardware to the compass setting
+                when {
+                    settings.stateOfSensors -> startSensorCollection()
+                    else -> stopSensorCollection()
+                }
+            }
+        }
+    }
+
+    private fun collectStationPositionChanges() {
+        viewModelScope.launch {
+            settingsRepo.stationPosition.collect { newPos ->
+                if (stationPos != newPos) {
+                    stationPos = newPos
+                    magDeclination = sensorsRepo.getMagDeclination(stationPos)
+                    lastCelestialUpdateMs = 0L // force celestial recompute on next tick
+                    val pass = _uiState.value.currentPass ?: return@collect
+                    if (!pass.isDeepSpace) {
+                        val track = satelliteRepo.getTrack(pass.orbitalObject, stationPos, pass.aosTime, pass.losTime)
+                        _uiState.update { it.copy(satTrack = track) }
+                    }
+                }
             }
         }
     }
@@ -212,8 +250,7 @@ class RadarViewModel(
     }
 
     override fun onCleared() {
-        sensorsRepo.disableSensor()
-        super.onCleared()
+        stopSensorCollection()
     }
 
     fun onAction(action: RadarAction) {
@@ -223,7 +260,17 @@ class RadarViewModel(
                 // Compute toggle state before the update so we don't read post-update value
                 val isTogglingOff = _uiState.value.transceivers.selectedUuid == action.uuid
                 val newUuid = if (isTogglingOff) null else action.uuid
-                _uiState.update { it.copy(transceivers = it.transceivers.copy(selectedUuid = newUuid)) }
+                // Load the saved offset for the newly selected satellite
+                val offsetKHz = if (!isTogglingOff) {
+                    transponders.find { it.uuid == action.uuid }
+                        ?.catnum?.let { settingsRepo.getSatelliteOffset(it) } ?: ""
+                } else ""
+                _uiState.update {
+                    it.copy(
+                        transceivers = it.transceivers.copy(selectedUuid = newUuid),
+                        calculatorOffsetKHz = offsetKHz
+                    )
+                }
                 // Only update the tracking service when selecting a different transponder to
                 // avoid resetting a user-adjusted TX base on re-expand
                 if (!isTogglingOff) {
@@ -272,6 +319,15 @@ class RadarViewModel(
                 sstvDecoder?.clearPixels()
                 _uiState.update { it.copy(sstv = it.sstv.copy(currentFrame = null)) }
             }
+            is RadarAction.ChangeCalculatorOffset -> {
+                val catnum = _uiState.value.transceivers.selectedUuid?.let { uuid ->
+                    transponders.find { it.uuid == uuid }?.catnum
+                }
+                if (catnum != null) {
+                    settingsRepo.setSatelliteOffset(catnum, action.offsetKHz)
+                }
+                _uiState.update { it.copy(calculatorOffsetKHz = action.offsetKHz) }
+            }
         }
     }
 
@@ -344,13 +400,32 @@ class RadarViewModel(
 
     private fun initSstvDecoder() {
         if (sstvDecoder == null) {
-            val decoder = SstvDecoder(sampleRate = audioCapture.sampleRate)
+            val decoder = SstvDecoder(
+                sampleRate = audioCapture.sampleRate,
+                targetRmsLevel = SSTV_TARGET_RMS,
+                includeScopeData = SSTV_INCLUDE_SCOPE,
+                enableRmsNormalization = SSTV_ENABLE_RMS_NORMALIZATION,
+                preFilterCutoffHz = SSTV_PREFILTER_CUTOFF_HZ,
+                enablePreFilter = SSTV_ENABLE_PREFILTER,
+                enableDiagnosticsHandle = SSTV_ENABLE_DIAGNOSTICS_HANDLE,
+                lineRecoveryStrategy = SSTV_LINE_RECOVERY_STRATEGY
+            )
             sstvDecoder = decoder
             decoder.lockMode(_uiState.value.sstv.selectedMode)
             _uiState.update { it.copy(sstv = it.sstv.copy(supportedModes = decoder.supportedModes)) }
             viewModelScope.launch {
                 decoder.frames.collect { frame ->
-                    _uiState.update { it.copy(sstv = it.sstv.copy(currentFrame = frame)) }
+                    val metrics = decoder.getQualityMetrics()
+                    _uiState.update {
+                        it.copy(sstv = it.sstv.copy(currentFrame = frame, diagnosticsMetrics = metrics))
+                    }
+                }
+            }
+            decoder.getDiagnosticsHandle()?.let { handle ->
+                viewModelScope.launch {
+                    handle.metrics.collectLatest { metrics ->
+                        _uiState.update { it.copy(sstv = it.sstv.copy(diagnosticsMetrics = metrics)) }
+                    }
                 }
             }
         }
@@ -374,6 +449,39 @@ class RadarViewModel(
     }
 
     companion object {
+        // SSTV Decoder Tuning Parameters
+        // ==============================
+        // SSTV_TARGET_RMS: Normalized signal level before FM demodulation.
+        //   - 0.25: Aggressive (original default), amplifies noise; use only for clean inputs
+        //   - 0.35-0.40: RECOMMENDED for typical phone/mic inputs
+        //   - 0.50-0.60: Conservative, best for noisy environments
+        private const val SSTV_TARGET_RMS = 0.45f  // Changed from 0.25 to safer default
+
+        // Enable/disable RMS normalization entirely. Set false for direct receiver outputs.
+        private const val SSTV_ENABLE_RMS_NORMALIZATION = true
+
+        // High-pass pre-filter to remove DC offset and subsonic noise before RMS normalization.
+        // Improves weak signal robustness by cleaning the noise floor estimate.
+        private const val SSTV_PREFILTER_CUTOFF_HZ = 500.0  // Removes everything below 500 Hz
+
+        // Enable pre-filtering. Set false to skip (minimal CPU cost if disabled).
+        private const val SSTV_ENABLE_PREFILTER = true
+
+        // Diagnostics handle can be enabled temporarily to capture field reports.
+        // Interpretation notes for noisy recordings:
+        //   - syncHitRate < 0.30: weak/noisy signal path or mistuned gain
+        //   - predictedLineBursts rising quickly: frequent sync loss and likely vertical collapse
+        //   - maxPredictedStreak > 3 in Robot36 mode: noisy path and synthetic line flooding
+        private const val SSTV_ENABLE_DIAGNOSTICS_HANDLE = false
+
+        // Line recovery policy:
+        //   - Look4SatLimited: caps predicted lines to reduce visible vertical collapse.
+        //   - Robot36Compatible: unlimited predicted lines (legacy Robot36 behavior).
+        // Ask users to compare both if they report line-skipping/compression artifacts.
+        private val SSTV_LINE_RECOVERY_STRATEGY = LineRecoveryStrategy.Robot36Compatible
+
+        // Debug: Return scope visualization in frames (increases per-frame memory usage).
+        private const val SSTV_INCLUDE_SCOPE = false
 
         val CTCSS_TONES = listOf(
             67.0, 69.3, 71.9, 74.4, 77.0, 79.7, 82.5, 85.4, 88.5, 91.5,
@@ -382,7 +490,6 @@ class RadarViewModel(
             218.1, 225.7, 233.6, 241.8, 250.3
         )
 
-
         fun factory(container: IMainContainer) = viewModelFactory {
             initializer {
                 RadarViewModel(

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/SstvPage.kt

@@ -53,11 +53,12 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import androidx.compose.ui.window.Dialog
 import com.rtbishop.look4sat.core.presentation.IconCard
 import com.rtbishop.look4sat.core.presentation.OutlinedText
 import com.rtbishop.look4sat.core.presentation.R
+import com.rtbishop.look4sat.core.presentation.SharedDialog
 import com.rtbishop.look4sat.core.presentation.infiniteMarquee
+import kotlin.math.roundToInt
 
 @Composable
 internal fun SstvPage(
@@ -94,53 +95,44 @@ internal fun SstvPage(
 
     if (showModeDialog.value) {
         val allModes = remember(sstv.supportedModes) { listOf("Auto") + sstv.supportedModes }
-        Dialog(onDismissRequest = { showModeDialog.value = false }) {
-            ElevatedCard {
-                Column(
-                    horizontalAlignment = Alignment.CenterHorizontally,
-                    modifier = Modifier.padding(vertical = 16.dp)
-                ) {
-                    Text(
-                        text = "SSTV Mode",
-                        fontSize = 16.sp,
-                        fontWeight = FontWeight.Medium,
-                        color = MaterialTheme.colorScheme.primary,
-                        modifier = Modifier.padding(bottom = 12.dp)
-                    )
-                    LazyColumn(
+        val dismiss = { showModeDialog.value = false }
+        SharedDialog(
+            title = "SSTV Mode",
+            onDismissRequest = dismiss,
+            onAccept = dismiss
+        ) { _ ->
+            LazyColumn(
+                modifier = Modifier
+                    .fillMaxHeight(0.7f)
+                    .background(MaterialTheme.colorScheme.background),
+                verticalArrangement = Arrangement.spacedBy(1.dp)
+            ) {
+                items(allModes) { mode ->
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
                         modifier = Modifier
-                            .fillMaxHeight(0.5f)
-                            .background(MaterialTheme.colorScheme.background),
-                        verticalArrangement = Arrangement.spacedBy(1.dp)
-                    ) {
-                        items(allModes) { mode ->
-                            Row(
-                                verticalAlignment = Alignment.CenterVertically,
-                                modifier = Modifier
-                                    .fillMaxWidth()
-                                    .background(MaterialTheme.colorScheme.surface)
-                                    .clickable {
-                                        onAction(RadarAction.SstvSelectMode(mode))
-                                        showModeDialog.value = false
-                                    }
-                            ) {
-                                Text(
-                                    text = mode,
-                                    fontSize = 16.sp,
-                                    fontWeight = FontWeight.Medium,
-                                    maxLines = 1,
-                                    overflow = TextOverflow.Ellipsis,
-                                    modifier = Modifier
-                                        .weight(1f)
-                                        .padding(start = 16.dp)
-                                )
-                                RadioButton(
-                                    selected = mode == sstv.selectedMode,
-                                    onClick = null,
-                                    modifier = Modifier.padding(horizontal = 16.dp, vertical = 12.dp)
-                                )
+                            .fillMaxWidth()
+                            .background(MaterialTheme.colorScheme.surface)
+                            .clickable {
+                                onAction(RadarAction.SstvSelectMode(mode))
+                                showModeDialog.value = false
                             }
-                        }
+                    ) {
+                        Text(
+                            text = mode,
+                            fontSize = 16.sp,
+                            fontWeight = FontWeight.Medium,
+                            maxLines = 1,
+                            overflow = TextOverflow.Ellipsis,
+                            modifier = Modifier
+                                .weight(1f)
+                                .padding(start = 16.dp)
+                        )
+                        RadioButton(
+                            selected = mode == sstv.selectedMode,
+                            onClick = null,
+                            modifier = Modifier.padding(horizontal = 16.dp, vertical = 12.dp)
+                        )
                     }
                 }
             }
@@ -181,6 +173,19 @@ internal fun SstvPage(
                 modifier = Modifier.align(Alignment.Center)
             )
         }
+
+        val qualityText = frame?.let {
+            val syncPct = (it.syncHitRate * 100f).roundToInt()
+            val gainX10 = (it.appliedGain * 10f).roundToInt() / 10f
+            val inputRmsX1000 = (it.inputRms * 1000f).roundToInt() / 1000f
+            val scope = if (it.scopePixels != null) " | Scope ${it.scopeWidth}x${it.scopeHeight}" else ""
+            val complete = if (it.imageComplete) " | Complete" else ""
+            "RMS $inputRmsX1000 | Gain x$gainX10 | Sync $syncPct% | Pred ${it.predictedLineBursts}/${it.maxPredictedStreak} | Err ${it.timingErrorSamples}$scope$complete"
+        } ?: sstv.diagnosticsMetrics?.let {
+            val syncPct = (it.syncHitRate * 100f).roundToInt()
+            "Sync $syncPct% | Pred ${it.predictedLineBursts}/${it.maxPredictedStreak} | Err ${it.timingErrorSamples}"
+        }
+
         // Bottom control bar — dark, blends with the black canvas
         Column(
             modifier = Modifier
@@ -198,6 +203,15 @@ internal fun SstvPage(
                 outlineColor = MaterialTheme.colorScheme.background,
                 modifier = Modifier.align(Alignment.CenterHorizontally)
             )
+            if (qualityText != null) {
+                OutlinedText(
+                    text = qualityText,
+                    fontSize = 12.sp,
+                    fillColor = MaterialTheme.colorScheme.onSurface,
+                    outlineColor = MaterialTheme.colorScheme.background,
+                    modifier = Modifier.align(Alignment.CenterHorizontally)
+                )
+            }
             Row(
                 verticalAlignment = Alignment.CenterVertically,
                 horizontalArrangement = Arrangement.spacedBy(8.dp),

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/TransceiversPage.kt

@@ -21,14 +21,18 @@ import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.expandVertically
 import androidx.compose.animation.shrinkVertically
 import androidx.compose.foundation.background
+import androidx.compose.foundation.border
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.FlowRow
+import androidx.compose.foundation.layout.IntrinsicSize
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
@@ -39,14 +43,23 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.text.BasicTextField
+import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material3.FilterChip
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Slider
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -54,12 +67,17 @@ import androidx.compose.ui.draw.rotate
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.rtbishop.look4sat.core.domain.model.SatRadio
+import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
+import com.rtbishop.look4sat.core.domain.utility.DopplerFrequencyCalculator
+import com.rtbishop.look4sat.core.domain.utility.TransponderMapper
 import com.rtbishop.look4sat.core.presentation.CardButton
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.formatFrequency
@@ -104,6 +122,73 @@ fun TransceiversPage(
     }
 }
 
+@Composable
+fun CalculatorPage(
+    transceivers: List<SatRadio>,
+    selectedUuid: String?,
+    orbitalPos: OrbitalPos?,
+    onAction: (RadarAction) -> Unit,
+    calculatorOffsetKHz: String = "",
+    modifier: Modifier = Modifier
+) {
+    val calculatorTransceivers = remember(transceivers) {
+        transceivers.filter(DopplerFrequencyCalculator::isNamedLinearTransponder)
+            .let(DopplerFrequencyCalculator::deduplicateTransponders)
+    }
+    val selectedTransceiver = remember(calculatorTransceivers, selectedUuid) {
+        calculatorTransceivers.firstOrNull { it.uuid == selectedUuid }
+            ?: calculatorTransceivers.firstOrNull()
+    }
+
+    if (selectedTransceiver == null) {
+        EmptyTransceiversContent(modifier)
+        return
+    }
+
+    LazyColumn(
+        modifier = modifier
+            .fillMaxSize()
+            .padding(8.dp),
+        verticalArrangement = Arrangement.spacedBy(10.dp)
+    ) {
+        if (calculatorTransceivers.size > 1) {
+            item {
+                FlowRow(
+                    horizontalArrangement = Arrangement.spacedBy(6.dp),
+                    verticalArrangement = Arrangement.spacedBy(4.dp),
+                    modifier = Modifier.fillMaxWidth()
+                ) {
+                    calculatorTransceivers.forEach { radio ->
+                        FilterChip(
+                            selected = radio.uuid == selectedTransceiver.uuid,
+                            onClick = {
+                                if (radio.uuid != selectedUuid) onAction(RadarAction.SelectTransmitter(radio.uuid))
+                            },
+                            label = {
+                                Text(
+                                    text = transceiverTitle(radio),
+                                    maxLines = 1,
+                                    overflow = TextOverflow.Ellipsis
+                                )
+                            }
+                        )
+                    }
+                }
+            }
+        }
+
+        item {
+            DopplerFrequencyCalculator(
+                transponder = selectedTransceiver,
+                orbitalPos = orbitalPos,
+                offsetKHz = calculatorOffsetKHz,
+                onOffsetChange = { onAction(RadarAction.ChangeCalculatorOffset(it)) },
+                modifier = Modifier.fillMaxWidth()
+            )
+        }
+    }
+}
+
 @Composable
 private fun EmptyTransceiversContent(modifier: Modifier = Modifier) {
     Box(contentAlignment = Alignment.Center, modifier = modifier.fillMaxSize()) {
@@ -172,12 +257,8 @@ private fun TransceiverItem(
                             .rotate(if (isExpanded) 270f else 90f)
                     )
                 }
-                // Title with mode
-                val title = if (radio.isInverted) "INV: ${radio.info}" else radio.info
-                val mode = "${radio.downlinkMode ?: "--"}/${radio.uplinkMode ?: "--"}"
-                val fullTitle = "$title ($mode)"
                 Text(
-                    text = fullTitle,
+                    text = transceiverTitle(radio),
                     textAlign = TextAlign.Center,
                     color = MaterialTheme.colorScheme.onSurface,
                     maxLines = 1,
@@ -369,10 +450,11 @@ private fun ExpandedRadioControl(
                 )
                 Spacer(modifier = Modifier.height(4.dp))
                 FlowRow(
-                    horizontalArrangement = Arrangement.spacedBy(4.dp),
+                    horizontalArrangement = Arrangement.spacedBy(2.dp),
+                    maxItemsInEachRow = 5,
                     modifier = Modifier.fillMaxWidth()
                 ) {
-                    val chipModifier = Modifier.width(64.dp)
+                    val chipModifier = Modifier.weight(1f)
                     FilterChip(
                         selected = radioControl.ctcssTone == null,
                         onClick = { onAction(RadarAction.SetCtcssTone(null)) },
@@ -436,6 +518,362 @@ private fun ExpandedRadioControl(
     }
 }
 
+private enum class EditedField { TX, PASSBAND, RX }
+
+@Composable
+private fun DopplerFrequencyCalculator(
+    transponder: SatRadio,
+    orbitalPos: OrbitalPos?,
+    offsetKHz: String = "",
+    onOffsetChange: (String) -> Unit = {},
+    modifier: Modifier = Modifier
+) {
+    if (orbitalPos == null || !DopplerFrequencyCalculator.isLinearTransponder(transponder)) return
+
+    var lastEditedField by remember { mutableStateOf(EditedField.TX) }
+    var txFrequencyHz by remember { mutableStateOf(0L) }
+    var rxFrequencyHz by remember { mutableStateOf(0L) }
+    var passbandPosition by remember { mutableStateOf(0.5f) }
+    var stepSizeKHz by remember { mutableIntStateOf(1) }
+
+    val offsetHz = offsetKHz.toDoubleOrNull()?.let { it * 1000 }?.toLong() ?: 0L
+
+    val txLow = transponder.uplinkLow ?: return
+    val txHigh = transponder.uplinkHigh ?: return
+    val rxLow = transponder.downlinkLow ?: return
+    val rxHigh = transponder.downlinkHigh ?: return
+    val txRange = txHigh - txLow
+    val rxRange = rxHigh - rxLow
+    if (txRange <= 0L || rxRange <= 0L) return
+
+    // 原始转发器值（逆转多普勒），用于 passband 映射计算
+    val rawTxLow = orbitalPos.getDownlinkFreq(txLow)
+    val rawTxHigh = orbitalPos.getDownlinkFreq(txHigh)
+    val rawRxLow = orbitalPos.getUplinkFreq(rxLow)
+    val rawRxHigh = orbitalPos.getUplinkFreq(rxHigh)
+    val rawTxRange = rawTxHigh - rawTxLow
+    val rawRxRange = rawRxHigh - rawRxLow
+    val rawTransponder = transponder.copy(
+        uplinkLow = rawTxLow, uplinkHigh = rawTxHigh,
+        downlinkLow = rawRxLow, downlinkHigh = rawRxHigh
+    )
+
+    // 初始化
+    LaunchedEffect(Unit) {
+        if (txFrequencyHz == 0L) {
+            txFrequencyHz = txLow + txRange / 2
+            rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+                txFrequencyHz, rawTransponder, orbitalPos, offsetHz
+            ) ?: (rxLow + rxRange / 2)
+        }
+    }
+
+    // 实时重算：卫星移动时，锚点侧不变，重算另一侧
+    LaunchedEffect(orbitalPos) {
+        if (lastEditedField == EditedField.TX) {
+            // TX 是锚点，不变；重算 RX
+            rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+                txFrequencyHz, rawTransponder, orbitalPos, offsetHz
+            ) ?: rxFrequencyHz
+        } else if (lastEditedField == EditedField.RX) {
+            // RX 是锚点，不变；重算 TX
+            txFrequencyHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
+                rxFrequencyHz, rawTransponder, orbitalPos, offsetHz
+            ) ?: txFrequencyHz
+        } else if (lastEditedField == EditedField.PASSBAND) {
+            // 相对位置不变（passbandPosition），TX 用地面频率，RX 经 Transceiver 完整路径计算
+            txFrequencyHz = txLow + (passbandPosition * txRange).toLong()
+            rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+                txFrequencyHz, rawTransponder, orbitalPos, offsetHz
+            ) ?: rxFrequencyHz
+        }
+    }
+
+    val txSliderValue = if (lastEditedField == EditedField.PASSBAND) {
+        passbandPosition
+    } else {
+        ((txFrequencyHz - txLow).toFloat() / txRange).coerceIn(0f, 1f)
+    }
+    val rxSliderValue = if (lastEditedField == EditedField.PASSBAND) {
+        ((rxFrequencyHz - rxLow).toFloat() / rxRange).coerceIn(0f, 1f)
+    } else {
+        ((rxFrequencyHz - rxLow).toFloat() / rxRange).coerceIn(0f, 1f)
+    }
+
+    fun updateTx(newTxHz: Long) {
+        when (lastEditedField) {
+            EditedField.PASSBAND -> {
+                // Passband 模式：滑块位置 → passbandPosition → 地面频率，RX 经 Transceiver 计算
+                val pos = ((newTxHz - txLow).toFloat() / txRange).coerceIn(0f, 1f)
+                passbandPosition = pos
+                txFrequencyHz = txLow + (pos * txRange).toLong()
+                rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+                    txFrequencyHz, rawTransponder, orbitalPos, offsetHz
+                ) ?: rxFrequencyHz
+            }
+            else -> {
+                txFrequencyHz = newTxHz.coerceIn(txLow, txHigh)
+                rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+                    txFrequencyHz, rawTransponder, orbitalPos, offsetHz
+                ) ?: rxFrequencyHz
+            }
+        }
+    }
+
+    fun updateRx(newRxHz: Long) {
+        when (lastEditedField) {
+            EditedField.PASSBAND -> {
+                // Passband 模式：从 RX 反推 TX 位置，TX 用地面频率
+                val pos = ((newRxHz - rxLow).toFloat() / rxRange).coerceIn(0f, 1f)
+                val txFromRx = TransponderMapper.mapDownlinkToUplink(newRxHz, rawTransponder)
+                passbandPosition = if (txFromRx != null) {
+                    ((txFromRx - rawTxLow).toFloat() / rawTxRange).coerceIn(0f, 1f)
+                } else pos
+                txFrequencyHz = txLow + (passbandPosition * txRange).toLong()
+                rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+                    txFrequencyHz, rawTransponder, orbitalPos, offsetHz
+                ) ?: rxFrequencyHz
+            }
+            else -> {
+                rxFrequencyHz = newRxHz.coerceIn(rxLow, rxHigh)
+                txFrequencyHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
+                    rxFrequencyHz, rawTransponder, orbitalPos, offsetHz
+                ) ?: txFrequencyHz
+            }
+        }
+    }
+
+    Column(
+        modifier = modifier.fillMaxWidth().padding(top = 16.dp),
+        verticalArrangement = Arrangement.spacedBy(12.dp)
+    ) {
+            Row(
+                modifier = Modifier.fillMaxWidth().height(IntrinsicSize.Min),
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.spacedBy(6.dp)
+            ) {
+                // 左半边: TX + RX 按钮
+                Row(
+                    modifier = Modifier.weight(1f),
+                    horizontalArrangement = Arrangement.spacedBy(4.dp),
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    FilterChip(
+                        selected = lastEditedField == EditedField.TX,
+                        onClick = {
+                            when (lastEditedField) {
+                                EditedField.TX -> {
+                                    passbandPosition = ((txFrequencyHz - txLow).toFloat() / txRange).coerceIn(0f, 1f)
+                                    lastEditedField = EditedField.PASSBAND
+                                    rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+                                        txFrequencyHz, rawTransponder, orbitalPos, offsetHz
+                                    ) ?: rxFrequencyHz
+                                }
+                                EditedField.PASSBAND -> { lastEditedField = EditedField.TX }
+                                else -> { lastEditedField = EditedField.TX }
+                            }
+                        },
+                        label = {
+                            Text("TX", fontSize = 13.sp, textAlign = TextAlign.Center,
+                                modifier = Modifier.fillMaxWidth())
+                        },
+                        modifier = Modifier.weight(1f).fillMaxHeight()
+                    )
+                    FilterChip(
+                        selected = lastEditedField == EditedField.RX,
+                        onClick = {
+                            when (lastEditedField) {
+                                EditedField.RX -> {
+                                    txFrequencyHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
+                                        rxFrequencyHz, rawTransponder, orbitalPos, offsetHz
+                                    ) ?: txFrequencyHz
+                                    passbandPosition = ((txFrequencyHz - txLow).toFloat() / txRange).coerceIn(0f, 1f)
+                                    lastEditedField = EditedField.PASSBAND
+                                }
+                                EditedField.PASSBAND -> {
+                                    lastEditedField = EditedField.RX
+                                    txFrequencyHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
+                                        rxFrequencyHz, rawTransponder, orbitalPos, offsetHz
+                                    ) ?: txFrequencyHz
+                                }
+                                else -> { lastEditedField = EditedField.RX }
+                            }
+                        },
+                        label = {
+                            Text("RX", fontSize = 13.sp, textAlign = TextAlign.Center,
+                                modifier = Modifier.fillMaxWidth())
+                        },
+                        modifier = Modifier.weight(1f).fillMaxHeight()
+                    )
+                }
+                // 右半边: Offset 输入框（带细线边框）
+                Box(
+                    modifier = Modifier
+                        .weight(1f)
+                        .height(48.dp)
+                        .border(1.dp, MaterialTheme.colorScheme.outline, MaterialTheme.shapes.small),
+                    contentAlignment = Alignment.Center
+                ) {
+                    BasicTextField(
+                        value = offsetKHz,
+                        onValueChange = onOffsetChange,
+                        singleLine = true,
+                        textStyle = TextStyle(
+                            fontSize = 16.sp,
+                            textAlign = TextAlign.Center,
+                            color = MaterialTheme.colorScheme.onSurface
+                        ),
+                        decorationBox = { innerTextField ->
+                            if (offsetKHz.isEmpty()) {
+                                Text(
+                                    text = "Offset (kHz)",
+                                    fontSize = 16.sp,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                                )
+                            }
+                            innerTextField()
+                        }
+                    )
+                }
+            }
+
+            // TX 行
+            Column(modifier = Modifier.fillMaxWidth()) {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    OutlinedButton(
+                        onClick = { updateTx(txFrequencyHz - stepSizeKHz * 1000L) },
+                        modifier = Modifier.width(32.dp).height(28.dp),
+                        contentPadding = PaddingValues(0.dp),
+                        shape = MaterialTheme.shapes.extraSmall
+                    ) { Text("−", fontSize = 14.sp) }
+
+                    Slider(
+                        value = txSliderValue,
+                        onValueChange = { norm ->
+                            val rawFreq = txLow + (txRange * norm).toLong()
+                            val snapped = ((rawFreq + 500) / 1000L) * 1000L
+                            updateTx(snapped.coerceIn(txLow, txHigh))
+                        },
+                        valueRange = 0f..1f,
+                        modifier = Modifier.weight(1f).height(20.dp).padding(horizontal = 4.dp)
+                    )
+
+                    OutlinedButton(
+                        onClick = { updateTx(txFrequencyHz + stepSizeKHz * 1000L) },
+                        modifier = Modifier.width(32.dp).height(28.dp),
+                        contentPadding = PaddingValues(0.dp),
+                        shape = MaterialTheme.shapes.extraSmall
+                    ) { Text("+", fontSize = 14.sp) }
+                }
+                Row(
+                    modifier = Modifier.fillMaxWidth().padding(horizontal = 4.dp),
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Text(
+                        text = String.format(Locale.ENGLISH, "%.4f", txLow / 1_000_000.0),
+                        fontSize = 12.sp,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        modifier = Modifier.weight(1f)
+                    )
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
+                        horizontalArrangement = Arrangement.Center
+                    ) {
+                        Text(
+                            text = String.format(Locale.ENGLISH, "%.6f", txFrequencyHz / 1_000_000.0),
+                            fontSize = 20.sp,
+                            fontWeight = FontWeight.Bold,
+                            color = MaterialTheme.colorScheme.primary
+                        )
+                        Text(
+                            text = " MHz",
+                            fontSize = 20.sp,
+                            fontWeight = FontWeight.Bold,
+                            color = MaterialTheme.colorScheme.primary
+                        )
+                    }
+                    Text(
+                        text = String.format(Locale.ENGLISH, "%.4f", txHigh / 1_000_000.0),
+                        fontSize = 12.sp,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        modifier = Modifier.weight(1f),
+                        textAlign = TextAlign.End
+                    )
+                }
+            }
+
+            HorizontalDivider(
+                thickness = 0.5.dp,
+                color = MaterialTheme.colorScheme.outline.copy(alpha = 0.3f)
+            )
+
+            // RX 行
+            Column(modifier = Modifier.fillMaxWidth()) {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    OutlinedButton(
+                        onClick = { updateRx(rxFrequencyHz - stepSizeKHz * 1000L) },
+                        modifier = Modifier.width(32.dp).height(28.dp),
+                        contentPadding = PaddingValues(0.dp),
+                        shape = MaterialTheme.shapes.extraSmall
+                    ) { Text("−", fontSize = 14.sp) }
+
+                    Slider(
+                        value = rxSliderValue,
+                        onValueChange = { norm ->
+                            val rawFreq = rxLow + (rxRange * norm).toLong()
+                            val snapped = ((rawFreq + 500) / 1000L) * 1000L
+                            updateRx(snapped.coerceIn(rxLow, rxHigh))
+                        },
+                        valueRange = 0f..1f,
+                        modifier = Modifier.weight(1f).height(20.dp).padding(horizontal = 4.dp)
+                    )
+
+                    OutlinedButton(
+                        onClick = { updateRx(rxFrequencyHz + stepSizeKHz * 1000L) },
+                        modifier = Modifier.width(32.dp).height(28.dp),
+                        contentPadding = PaddingValues(0.dp),
+                        shape = MaterialTheme.shapes.extraSmall
+                    ) { Text("+", fontSize = 14.sp) }
+                }
+                Row(
+                    modifier = Modifier.fillMaxWidth().padding(horizontal = 4.dp),
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Text(
+                        text = String.format(Locale.ENGLISH, "%.4f", rxLow / 1_000_000.0),
+                        fontSize = 12.sp,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        modifier = Modifier.weight(1f)
+                    )
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
+                        horizontalArrangement = Arrangement.Center
+                    ) {
+                        Text(
+                            text = String.format(Locale.ENGLISH, "%.6f", rxFrequencyHz / 1_000_000.0),
+                            fontSize = 20.sp,
+                            fontWeight = FontWeight.Bold,
+                            color = MaterialTheme.colorScheme.primary
+                        )
+                        Text(
+                            text = " MHz",
+                            fontSize = 20.sp,
+                            fontWeight = FontWeight.Bold,
+                            color = MaterialTheme.colorScheme.primary
+                        )
+                    }
+                    Text(
+                        text = String.format(Locale.ENGLISH, "%.4f", rxHigh / 1_000_000.0),
+                        fontSize = 12.sp,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        modifier = Modifier.weight(1f),
+                        textAlign = TextAlign.End
+                    )
+                }
+            }
+        }
+}
+
 @Composable
 private fun FrequencyText(frequency: Long?, modifier: Modifier = Modifier) {
     val text = frequency?.let {
@@ -451,5 +889,12 @@ private fun FrequencyText(frequency: Long?, modifier: Modifier = Modifier) {
     )
 }
 
+private fun transceiverTitle(radio: SatRadio): String {
+    val title = if (radio.isInverted) "INV: ${radio.info}" else radio.info
+    val mode = "${radio.downlinkMode ?: "--"}/${radio.uplinkMode ?: "--"}"
+    return "$title ($mode)"
+}
+
 private val FREQ_ADJUSTMENTS =
     listOf(-10_000L to "-10k", -1_000L to "-1k", -100L to "-100", 100L to "+100", 1_000L to "+1k", 10_000L to "+10k")
+

feature/satellites/src/main/java/com/rtbishop/look4sat/feature/satellites/SatellitesDialog.kt

@@ -45,18 +45,18 @@ import com.rtbishop.look4sat.core.presentation.SharedDialog
 
 @Preview(showBackground = true)
 @Composable
-private fun MultiTypesDialogPreview() {
-    val types = listOf("Amateur", "Geostationary", "Military", "Weather")
-    MainTheme { MultiTypesDialog(types, emptyList(), {}) {} }
+private fun MultiModesDialogPreview() {
+    val modes = listOf("FM", "APT", "SSTV", "BPSK")
+    MainTheme { MultiModesDialog(modes, emptyList(), {}) {} }
 }
 
 @Composable
-internal fun MultiTypesDialog(
-    allTypes: List<String>, types: List<String>, cancel: () -> Unit, accept: (List<String>) -> Unit
+internal fun MultiModesDialog(
+    allModes: List<String>, modes: List<String>, cancel: () -> Unit, accept: (List<String>) -> Unit
 ) {
-    val selected = remember { mutableStateOf(types.toSet()) }
-    val toggle = { type: String ->
-        selected.value = if (type in selected.value) selected.value - type else selected.value + type
+    val selected = remember { mutableStateOf(modes.toSet()) }
+    val toggle = { mode: String ->
+        selected.value = if (mode in selected.value) selected.value - mode else selected.value + mode
     }
     val onAccept = { accept(selected.value.toList()) }
     SharedDialog(title = stringResource(R.string.sat_type_title), onCancel = cancel, onAccept = onAccept) {
@@ -68,7 +68,7 @@ internal fun MultiTypesDialog(
             horizontalArrangement = Arrangement.spacedBy(1.dp),
             verticalArrangement = Arrangement.spacedBy(1.dp)
         ) {
-            itemsIndexed(allTypes) { index, item ->
+            itemsIndexed(allModes) { index, item ->
                 Row(
                     verticalAlignment = Alignment.CenterVertically,
                     modifier = Modifier

feature/satellites/src/main/java/com/rtbishop/look4sat/feature/satellites/SatellitesScreen.kt

@@ -62,10 +62,10 @@ import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.presentation.CardLoadingIndicator
 import com.rtbishop.look4sat.core.presentation.EmptyListCard
 import com.rtbishop.look4sat.core.presentation.IconCard
-import com.rtbishop.look4sat.core.presentation.InfoDialog
 import com.rtbishop.look4sat.core.presentation.MainTheme
 import com.rtbishop.look4sat.core.presentation.PrimaryIconCard
 import com.rtbishop.look4sat.core.presentation.R
+import com.rtbishop.look4sat.core.presentation.SharedDialog
 import com.rtbishop.look4sat.core.presentation.TopBar
 import com.rtbishop.look4sat.core.presentation.infiniteMarquee
 import com.rtbishop.look4sat.core.presentation.isVerticalLayout
@@ -87,19 +87,28 @@ private fun SatellitesScreen(
     navigateUp: () -> Unit
 ) {
     if (uiState.isDialogShown) {
-        MultiTypesDialog(
-            allTypes = uiState.typesList,
-            types = uiState.currentTypes,
-            cancel = { onAction(SatellitesAction.ToggleTypesDialog) },
-            accept = { onAction(SatellitesAction.SelectTypes(it)) }
+        MultiModesDialog(
+            allModes = uiState.modesList,
+            modes = uiState.currentModes,
+            cancel = { onAction(SatellitesAction.ToggleModesDialog) },
+            accept = { onAction(SatellitesAction.SelectModes(it)) }
         )
     }
     if (uiState.shouldSeeWarning) {
-        InfoDialog(
-            stringResource(R.string.sat_warning_title),
-            stringResource(R.string.sat_warning_message)
-        ) {
-            onAction(SatellitesAction.DismissWarning)
+        val dismiss = { onAction(SatellitesAction.DismissWarning) }
+        SharedDialog(
+            title = stringResource(R.string.sat_warning_title),
+            onDismissRequest = dismiss,
+            onAccept = dismiss,
+            titleFontSize = 18
+        ) { padding ->
+            Text(
+                text = stringResource(R.string.sat_warning_message),
+                fontSize = 16.sp,
+                color = MaterialTheme.colorScheme.onSurface,
+                modifier = Modifier.padding(horizontal = padding)
+            )
+            Spacer(modifier = Modifier.height(0.dp))
         }
     }
 
@@ -114,9 +123,9 @@ private fun SatellitesScreen(
     Column(modifier = Modifier.layoutPadding(), verticalArrangement = Arrangement.spacedBy(6.dp)) {
         if (isVerticalLayout()) {
             TopBar {
-                TypeCard(
-                    types = uiState.currentTypes,
-                    onClick = { onAction(SatellitesAction.ToggleTypesDialog) },
+                ModeCard(
+                    modes = uiState.currentModes,
+                    onClick = { onAction(SatellitesAction.ToggleModesDialog) },
                     modifier = Modifier.weight(1f)
                 )
                 PrimaryIconCard(
@@ -148,9 +157,9 @@ private fun SatellitesScreen(
                     resId = R.drawable.ic_done,
                     modifier = Modifier.semantics { contentDescription = primCardCd }
                 )
-                TypeCard(
-                    types = uiState.currentTypes,
-                    onClick = { onAction(SatellitesAction.ToggleTypesDialog) },
+                ModeCard(
+                    modes = uiState.currentModes,
+                    onClick = { onAction(SatellitesAction.ToggleModesDialog) },
                     modifier = Modifier.weight(1f)
                 )
                 SearchBar(
@@ -232,8 +241,8 @@ private fun SearchBar(onQueryChange: (String) -> Unit, modifier: Modifier = Modi
 }
 
 @Composable
-private fun TypeCard(types: List<String>, onClick: () -> Unit, modifier: Modifier = Modifier) {
-    val typesText = if (types.isEmpty()) "All" else types.joinToString(", ")
+private fun ModeCard(modes: List<String>, onClick: () -> Unit, modifier: Modifier = Modifier) {
+    val modesText = if (modes.isEmpty()) "All" else modes.joinToString(", ")
     ElevatedCard(modifier = modifier) {
         Row(
             horizontalArrangement = Arrangement.spacedBy(12.dp),
@@ -243,12 +252,12 @@ private fun TypeCard(types: List<String>, onClick: () -> Unit, modifier: Modifie
                 .clickable { onClick() }) {
             Spacer(Modifier)
             Icon(
-                painter = painterResource(id = R.drawable.ic_tags),
+                painter = painterResource(id = R.drawable.ic_radios),
                 contentDescription = null,
                 tint = MaterialTheme.colorScheme.primary
             )
             Text(
-                text = stringResource(R.string.sat_type_hint, typesText),
+                text = stringResource(R.string.sat_type_hint, modesText),
                 fontSize = 16.sp,
                 fontWeight = FontWeight.Medium,
                 modifier = Modifier
@@ -314,9 +323,54 @@ private fun SatellitesPreview() {
 
 @Composable
 private fun SatellitesCard(items: List<SatItem>, onSelected: (Int, Boolean) -> Unit) {
+    val selectedItems = items.filter { it.isSelected }
+    val availableItems = items.filterNot { it.isSelected }
+
     LazyVerticalGrid(columns = GridCells.Adaptive(320.dp)) {
-        items(items = items, key = { item -> item.catnum }) { entry ->
-            Satellite(entry, onSelected, Modifier.animateItem())
+        stickyHeader(key = "sat_summary_header") {
+            SummaryHeader(
+                selectedText = stringResource(R.string.sat_group_selected_count, selectedItems.size),
+                availableText = stringResource(R.string.sat_group_available_count, availableItems.size)
+            )
+        }
+
+        if (selectedItems.isNotEmpty()) {
+            items(items = selectedItems, key = { item -> item.catnum }) { entry ->
+                Satellite(entry, onSelected, Modifier.animateItem())
+            }
+        }
+
+        if (availableItems.isNotEmpty()) {
+            items(items = availableItems, key = { item -> item.catnum }) { entry ->
+                Satellite(entry, onSelected, Modifier.animateItem())
+            }
         }
     }
 }
+
+@Composable
+private fun SummaryHeader(selectedText: String, availableText: String) {
+    Row(
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.SpaceBetween,
+        modifier = Modifier
+            .fillMaxWidth()
+            .background(MaterialTheme.colorScheme.surfaceContainerHighest)
+            .padding(horizontal = 12.dp, vertical = 4.dp)
+    ) {
+        Text(
+            text = selectedText,
+            style = MaterialTheme.typography.titleSmall,
+            fontWeight = FontWeight.SemiBold,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+        Text(
+            text = availableText,
+            style = MaterialTheme.typography.titleSmall,
+            fontWeight = FontWeight.SemiBold,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+    }
+}
+
+

feature/satellites/src/main/java/com/rtbishop/look4sat/feature/satellites/SatellitesState.kt

@@ -24,8 +24,8 @@ data class SatellitesState(
     val isLoading: Boolean = true,
     val shouldSeeWarning: Boolean = false,
     val itemsList: List<SatItem> = emptyList(),
-    val currentTypes: List<String> = emptyList(),
-    val typesList: List<String> = emptyList()
+    val currentModes: List<String> = emptyList(),
+    val modesList: List<String> = emptyList()
 )
 
 sealed interface SatellitesAction {
@@ -34,7 +34,7 @@ sealed interface SatellitesAction {
     data class SearchFor(val query: String) : SatellitesAction
     data object SelectAll : SatellitesAction
     data class SelectSingle(val id: Int, val isTicked: Boolean) : SatellitesAction
-    data class SelectTypes(val types: List<String>) : SatellitesAction
-    data object ToggleTypesDialog : SatellitesAction
+    data class SelectModes(val modes: List<String>) : SatellitesAction
+    data object ToggleModesDialog : SatellitesAction
     data object UnselectAll : SatellitesAction
 }

feature/satellites/src/main/java/com/rtbishop/look4sat/feature/satellites/SatellitesViewModel.kt

@@ -35,13 +35,13 @@ class SatellitesViewModel(
     private val settingsRepo: ISettingsRepo
 ) : ViewModel() {
 
-    private val defaultTypes = selectionRepo.getCurrentTypes()
+    private val defaultModes = selectionRepo.getCurrentModes()
     private val _uiState = MutableStateFlow(
         SatellitesState(
             isLoading = true,
             shouldSeeWarning = settingsRepo.otherSettings.value.shouldSeeWarning,
-            currentTypes = defaultTypes,
-            typesList = selectionRepo.getTypesList()
+            currentModes = defaultModes,
+            modesList = selectionRepo.getModesList()
         )
     )
     val uiState: StateFlow<SatellitesState> = _uiState
@@ -49,7 +49,7 @@ class SatellitesViewModel(
     init {
         viewModelScope.launch {
             selectionRepo.setQuery(String())
-            selectionRepo.setTypes(defaultTypes)
+            selectionRepo.setModes(defaultModes)
             selectionRepo.getEntriesFlow().collectLatest { items ->
                 _uiState.update { it.copy(isLoading = false, itemsList = items) }
             }
@@ -59,6 +59,11 @@ class SatellitesViewModel(
                 _uiState.update { it.copy(shouldSeeWarning = settings.shouldSeeWarning) }
             }
         }
+        viewModelScope.launch {
+            settingsRepo.selectedSatModes.collectLatest { modes ->
+                _uiState.update { it.copy(currentModes = modes) }
+            }
+        }
     }
 
     fun onAction(action: SatellitesAction) {
@@ -68,8 +73,8 @@ class SatellitesViewModel(
             is SatellitesAction.SearchFor -> searchFor(action.query)
             SatellitesAction.SelectAll -> selectAll(true)
             is SatellitesAction.SelectSingle -> selectSingle(action.id, action.isTicked)
-            is SatellitesAction.SelectTypes -> selectTypes(action.types)
-            SatellitesAction.ToggleTypesDialog -> toggleTypesDialog()
+            is SatellitesAction.SelectModes -> selectModes(action.modes)
+            SatellitesAction.ToggleModesDialog -> toggleModesDialog()
             SatellitesAction.UnselectAll -> selectAll(false)
         }
     }
@@ -86,12 +91,12 @@ class SatellitesViewModel(
         selectionRepo.setSelection(listOf(id), isTicked.not())
     }
 
-    private fun selectTypes(types: List<String>) = viewModelScope.launch {
-        selectionRepo.setTypes(types)
-        _uiState.update { it.copy(currentTypes = types, isDialogShown = false) }
+    private fun selectModes(modes: List<String>) = viewModelScope.launch {
+        selectionRepo.setModes(modes)
+        _uiState.update { it.copy(currentModes = modes, isDialogShown = false) }
     }
 
-    private fun toggleTypesDialog() {
+    private fun toggleModesDialog() {
         _uiState.update { it.copy(isDialogShown = !it.isDialogShown) }
     }
 

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsDialog.kt

@@ -17,27 +17,29 @@
  */
 package com.rtbishop.look4sat.feature.settings
 
-import android.bluetooth.BluetoothManager
-import android.content.Context
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.FlowRow
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
@@ -62,16 +64,28 @@ fun PositionDialog(lat: Double, lon: Double, dismiss: () -> Unit, save: (Double,
     val titleText = stringResource(id = R.string.prefs_station_title)
     val onAccept = { saveValues(latValue.value, lonValue.value, save).also { dismiss() } }
     SharedDialog(title = titleText, onCancel = dismiss, onAccept = onAccept) {
-        OutlinedTextField(
-            value = latValue.value,
-            onValueChange = { latValue.value = it },
-            label = { Text(text = stringResource(id = R.string.prefs_station_lat_text)) }
-        )
-        OutlinedTextField(
-            value = lonValue.value,
-            onValueChange = { lonValue.value = it },
-            label = { Text(text = stringResource(id = R.string.prefs_station_lon_text)) }
-        )
+        Row(
+            horizontalArrangement = Arrangement.spacedBy(6.dp),
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = LocalSpacing.current.large)
+        ) {
+            OutlinedTextField(
+                value = latValue.value,
+                onValueChange = { latValue.value = it },
+                label = { Text(text = stringResource(id = R.string.prefs_station_lat_text)) },
+                singleLine = true,
+                modifier = Modifier.weight(1f),
+            )
+            OutlinedTextField(
+                value = lonValue.value,
+                onValueChange = { lonValue.value = it },
+                label = { Text(text = stringResource(id = R.string.prefs_station_lon_text)) },
+                singleLine = true,
+                modifier = Modifier.weight(1f),
+            )
+        }
+        Spacer(modifier = Modifier.height(0.dp))
     }
 }
 
@@ -93,12 +107,20 @@ private fun LocatorDialogPreview() {
 fun LocatorDialog(qthLocator: String, dismiss: () -> Unit, save: (String) -> Unit) {
     val locator = rememberSaveable { mutableStateOf(qthLocator) }
     val onAccept = { save(locator.value).also { dismiss() } }
-    SharedDialog(title = stringResource(R.string.prefs_locator_title), onCancel = dismiss, onAccept = onAccept) {
+    SharedDialog(
+        title = stringResource(R.string.prefs_locator_title),
+        onCancel = dismiss,
+        onAccept = onAccept
+    ) {
         OutlinedTextField(
             value = locator.value,
             onValueChange = { locator.value = it },
-            label = { Text(text = stringResource(id = R.string.prefs_locator_text)) }
+            label = { Text(text = stringResource(id = R.string.prefs_locator_text)) },
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = LocalSpacing.current.large),
         )
+        Spacer(modifier = Modifier.height(0.dp))
     }
 }
 
@@ -111,6 +133,7 @@ private fun TransceiversDialogPreview() {
             useCustomTransceivers = true,
             tleUrl = "https://example.com/tle.txt",
             transceiversUrl = "https://example.com/tx.json",
+            requestCustomSourcesPermission = { onGranted, _ -> onGranted() },
             onImportTle = {},
             onImportTransceivers = {},
             onDismiss = {},
@@ -125,6 +148,7 @@ fun DataSourcesDialog(
     useCustomTransceivers: Boolean,
     tleUrl: String,
     transceiversUrl: String,
+    requestCustomSourcesPermission: (onGranted: () -> Unit, onDenied: () -> Unit) -> Unit,
     onImportTle: () -> Unit,
     onImportTransceivers: () -> Unit,
     onDismiss: () -> Unit,
@@ -136,7 +160,12 @@ fun DataSourcesDialog(
     val urlTle = rememberSaveable { mutableStateOf(tleUrl) }
     val urlTransceivers = rememberSaveable { mutableStateOf(transceiversUrl) }
     val onAccept = {
-        onSave(isEnabledCustomTle.value, isEnabledCustomTransceivers.value, urlTle.value, urlTransceivers.value)
+        onSave(
+            isEnabledCustomTle.value,
+            isEnabledCustomTransceivers.value,
+            urlTle.value,
+            urlTransceivers.value
+        )
         onDismiss()
     }
     val onCancel = { onDismiss() }
@@ -152,7 +181,7 @@ fun DataSourcesDialog(
                         onImportTle()
                         onDismiss()
                     },
-                    text = "TLE (3LE)\nR4UAB (.txt)",
+                    text = "TLE/3LE (.txt)\nOMM (.csv)",
                     modifier = Modifier.weight(1f)
                 )
                 CardButton(
@@ -173,7 +202,16 @@ fun DataSourcesDialog(
                 Text(text = stringResource(id = R.string.prefs_data_sources_tle_switch))
                 Switch(
                     checked = isEnabledCustomTle.value,
-                    onCheckedChange = { isEnabledCustomTle.value = it }
+                    onCheckedChange = { enabled ->
+                        if (!enabled) {
+                            isEnabledCustomTle.value = false
+                        } else {
+                            requestCustomSourcesPermission(
+                                { isEnabledCustomTle.value = true },
+                                { isEnabledCustomTle.value = false }
+                            )
+                        }
+                    }
                 )
             }
             OutlinedTextField(
@@ -193,7 +231,16 @@ fun DataSourcesDialog(
                 Text(text = stringResource(id = R.string.prefs_data_sources_transceivers_switch))
                 Switch(
                     checked = isEnabledCustomTransceivers.value,
-                    onCheckedChange = { isEnabledCustomTransceivers.value = it }
+                    onCheckedChange = { enabled ->
+                        if (!enabled) {
+                            isEnabledCustomTransceivers.value = false
+                        } else {
+                            requestCustomSourcesPermission(
+                                { isEnabledCustomTransceivers.value = true },
+                                { isEnabledCustomTransceivers.value = false }
+                            )
+                        }
+                    }
                 )
             }
             OutlinedTextField(
@@ -204,6 +251,7 @@ fun DataSourcesDialog(
                 modifier = Modifier.fillMaxWidth(),
                 enabled = isEnabledCustomTransceivers.value,
             )
+            Spacer(modifier = Modifier.height(12.dp))
         }
     }
 }
@@ -294,6 +342,7 @@ fun NetworkOutputDialog(
                 onFormatChange = { frequencyFormat.value = it },
                 formatLabel = stringResource(R.string.prefs_net_frequency_format_hint)
             )
+            Spacer(modifier = Modifier.height(12.dp))
         }
     }
 }
@@ -346,11 +395,15 @@ fun BluetoothOutputDialog(
 ) {
     val padding = LocalSpacing.current.large
     val rotatorState = rememberSaveable { mutableStateOf(initialSettings.bluetoothRotatorState) }
-    val rotatorAddress = rememberSaveable { mutableStateOf(initialSettings.bluetoothRotatorAddress) }
+    val rotatorAddress =
+        rememberSaveable { mutableStateOf(initialSettings.bluetoothRotatorAddress) }
     val rotatorFormat = rememberSaveable { mutableStateOf(initialSettings.bluetoothRotatorFormat) }
-    val frequencyState = rememberSaveable { mutableStateOf(initialSettings.bluetoothFrequencyState) }
-    val frequencyAddress = rememberSaveable { mutableStateOf(initialSettings.bluetoothFrequencyAddress) }
-    val frequencyFormat = rememberSaveable { mutableStateOf(initialSettings.bluetoothFrequencyFormat) }
+    val frequencyState =
+        rememberSaveable { mutableStateOf(initialSettings.bluetoothFrequencyState) }
+    val frequencyAddress =
+        rememberSaveable { mutableStateOf(initialSettings.bluetoothFrequencyAddress) }
+    val frequencyFormat =
+        rememberSaveable { mutableStateOf(initialSettings.bluetoothFrequencyFormat) }
     val onAccept = {
         onSave(
             rotatorState.value, rotatorAddress.value, rotatorFormat.value,
@@ -387,6 +440,7 @@ fun BluetoothOutputDialog(
                 onFormatChange = { frequencyFormat.value = it },
                 formatLabel = stringResource(R.string.prefs_bt_frequency_output_hint)
             )
+            Spacer(modifier = Modifier.height(12.dp))
         }
     }
 }
@@ -441,14 +495,14 @@ private fun OutputChannelSection(
 @Composable
 fun RadioControlDialog(
     initialSettings: RadioControlSettings,
+    pairedBluetoothDevices: List<Pair<String, String>>,
     onDismiss: () -> Unit,
     onSave: (RadioControlSettings) -> Unit
 ) {
-    val context = androidx.compose.ui.platform.LocalContext.current
     val padding = LocalSpacing.current.large
-    val baudRates = listOf(4800, 9600, 38400)
     val enabled = rememberSaveable { mutableStateOf(initialSettings.enabled) }
     val radioModel = rememberSaveable { mutableStateOf(initialSettings.radioModel) }
+    val splitMode = rememberSaveable { mutableStateOf(initialSettings.splitMode) }
     val txAddress = rememberSaveable { mutableStateOf(initialSettings.txRadioAddress) }
     val rxAddress = rememberSaveable { mutableStateOf(initialSettings.rxRadioAddress) }
     val txName = rememberSaveable { mutableStateOf(initialSettings.txRadioName) }
@@ -456,14 +510,17 @@ fun RadioControlDialog(
     val baudRate = rememberSaveable { mutableIntStateOf(initialSettings.baudRate) }
     val selectingFor = rememberSaveable { mutableStateOf("") } // "tx", "rx", or ""
 
-    val pairedDevices = remember {
-        try {
-            val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
-            manager.adapter?.bondedDevices?.map { Pair(it.name ?: "Unknown", it.address) } ?: emptyList()
-        } catch (_: SecurityException) {
-            emptyList()
-        }
-    }
+    val isIcom = radioModel.value == RadioControlSettings.MODEL_ICOM_IC705
+    val isSingleRadio = isIcom && splitMode.value
+
+    // Reset split mode when switching away from IC-705
+    if (!isIcom && splitMode.value) splitMode.value = false
+
+    val baudRates = if (isIcom) RadioControlSettings.BAUD_RATES_ICOM
+    else RadioControlSettings.BAUD_RATES_YAESU
+
+    // If current baud rate is not in the new list, default to the first available
+    if (baudRate.intValue !in baudRates) baudRate.intValue = baudRates.first()
 
     val onAccept = {
         onSave(
@@ -471,20 +528,23 @@ fun RadioControlDialog(
                 enabled = enabled.value,
                 radioModel = radioModel.value,
                 txRadioAddress = txAddress.value,
-                rxRadioAddress = rxAddress.value,
+                rxRadioAddress = if (isSingleRadio) "" else rxAddress.value,
                 txRadioName = txName.value,
-                rxRadioName = rxName.value,
-                baudRate = baudRate.intValue
+                rxRadioName = if (isSingleRadio) "" else rxName.value,
+                baudRate = baudRate.intValue,
+                splitMode = splitMode.value
             )
         )
         onDismiss()
     }
+
     SharedDialog(
         title = stringResource(R.string.rc_settings_title),
         onCancel = onDismiss,
         onAccept = onAccept
     ) {
         Column(modifier = Modifier.padding(horizontal = padding)) {
+
             Row(
                 horizontalArrangement = Arrangement.SpaceBetween,
                 verticalAlignment = Alignment.CenterVertically,
@@ -495,59 +555,98 @@ fun RadioControlDialog(
             }
             Spacer(modifier = Modifier.height(6.dp))
 
-            // Radio model selection
             Text(
-                stringResource(R.string.rc_radio_model),
-                fontWeight = androidx.compose.ui.text.font.FontWeight.Medium,
-                color = androidx.compose.material3.MaterialTheme.colorScheme.primary
+                text = stringResource(R.string.rc_radio_model),
+                fontWeight = FontWeight.Medium,
+                color = MaterialTheme.colorScheme.primary
             )
-            Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
+            Row(
+                horizontalArrangement = Arrangement.spacedBy(2.dp),
+                modifier = Modifier.fillMaxWidth()
+            ) {
                 RadioControlSettings.SUPPORTED_RADIOS.forEach { model ->
-                    androidx.compose.material3.FilterChip(
+                    FilterChip(
                         selected = radioModel.value == model,
                         onClick = { radioModel.value = model },
-                        label = { Text(model, fontSize = 12.sp) },
-                        enabled = enabled.value
+                        label = {
+                            Text(
+                                text = compactRadioModelLabel(model),
+                                fontSize = 12.sp,
+                                textAlign = TextAlign.Center,
+                                modifier = Modifier.fillMaxWidth()
+                            )
+                        },
+                        enabled = enabled.value,
+                        modifier = Modifier.weight(1f)
                     )
                 }
             }
             Spacer(modifier = Modifier.height(6.dp))
 
-            // TX Radio selection
-            Text("TX Radio (Uplink)", fontWeight = androidx.compose.ui.text.font.FontWeight.Medium)
-            if (txAddress.value.isNotBlank()) {
-                Text("${txName.value} - ${txAddress.value}", fontSize = 13.sp)
+            val isSplitModeAvailable = enabled.value && isIcom
+            val splitModeLabelColor = if (isSplitModeAvailable) {
+                MaterialTheme.colorScheme.onSurface
+            } else {
+                MaterialTheme.colorScheme.onSurface.copy(alpha = 0.56f)
             }
-            CardButton(
-                onClick = { selectingFor.value = "tx" },
-                text = "Select TX Device",
+            Row(
+                horizontalArrangement = Arrangement.SpaceBetween,
+                verticalAlignment = Alignment.CenterVertically,
                 modifier = Modifier.fillMaxWidth()
-            )
+            ) {
+                Text(
+                    text = "Split mode (IC-705 only)",
+                    fontWeight = FontWeight.Medium,
+                    color = splitModeLabelColor
+                )
+                Switch(
+                    checked = splitMode.value,
+                    onCheckedChange = { splitMode.value = it },
+                    enabled = isSplitModeAvailable
+                )
+            }
             Spacer(modifier = Modifier.height(6.dp))
 
-            // RX Radio selection
-            Text("RX Radio (Downlink)", fontWeight = androidx.compose.ui.text.font.FontWeight.Medium)
-            if (rxAddress.value.isNotBlank()) {
-                Text("${rxName.value} - ${rxAddress.value}", fontSize = 13.sp)
-            }
-            CardButton(
-                onClick = { selectingFor.value = "rx" },
-                text = "Select RX Device",
+            Text("Radio devices", fontWeight = FontWeight.Medium)
+            Row(
+                horizontalArrangement = Arrangement.spacedBy(6.dp),
                 modifier = Modifier.fillMaxWidth()
-            )
+            ) {
+                CardButton(
+                    onClick = { selectingFor.value = "tx" },
+                    text = if (isSingleRadio) "Select Radio" else "Select TX",
+                    modifier = Modifier.weight(1f)
+                )
+                CardButton(
+                    onClick = { if (!isSingleRadio) selectingFor.value = "rx" },
+                    text = if (isSingleRadio) "RX = TX" else "Select RX",
+                    modifier = Modifier.weight(1f)
+                )
+            }
+            if (txAddress.value.isNotBlank()) {
+                Text("TX: ${txName.value} — ${txAddress.value}", fontSize = 13.sp)
+            }
+            if (isSingleRadio && txAddress.value.isNotBlank()) {
+                Text("RX: same as TX", fontSize = 13.sp)
+            } else if (rxAddress.value.isNotBlank()) {
+                Text("RX: ${rxName.value} — ${rxAddress.value}", fontSize = 13.sp)
+            }
+            Spacer(modifier = Modifier.height(6.dp))
 
-            // Paired devices list (shown when selecting)
             if (selectingFor.value.isNotBlank()) {
-                Spacer(modifier = Modifier.height(6.dp))
                 Text(
                     text = "Paired Bluetooth Devices:",
-                    fontWeight = androidx.compose.ui.text.font.FontWeight.Medium,
-                    color = androidx.compose.material3.MaterialTheme.colorScheme.primary
+                    fontWeight = FontWeight.Medium,
+                    color = MaterialTheme.colorScheme.primary
                 )
-                if (pairedDevices.isEmpty()) {
-                    Text("No paired devices found. Pair your BT adapter in Android Bluetooth settings first.")
+                Spacer(modifier = Modifier.height(2.dp))
+                if (pairedBluetoothDevices.isEmpty()) {
+                    Text(
+                        "No paired devices found. Pair your BT adapter in Android Bluetooth settings first.",
+                        fontSize = 13.sp
+                    )
                 } else {
-                    pairedDevices.forEach { (name, address) ->
+                    pairedBluetoothDevices.forEach { (name, address) ->
                         androidx.compose.material3.Surface(
                             modifier = Modifier
                                 .fillMaxWidth()
@@ -555,6 +654,10 @@ fun RadioControlDialog(
                                     if (selectingFor.value == "tx") {
                                         txAddress.value = address
                                         txName.value = name
+                                        if (isSingleRadio) {
+                                            rxAddress.value = address
+                                            rxName.value = name
+                                        }
                                     } else {
                                         rxAddress.value = address
                                         rxName.value = name
@@ -573,25 +676,50 @@ fun RadioControlDialog(
                         }
                     }
                 }
+                Spacer(modifier = Modifier.height(6.dp))
             }
 
-            Spacer(modifier = Modifier.height(6.dp))
-            Row(
-                horizontalArrangement = Arrangement.SpaceBetween,
-                verticalAlignment = Alignment.CenterVertically,
+            Text("Baud Rate:", fontWeight = FontWeight.Medium)
+            FlowRow(
+                horizontalArrangement = Arrangement.spacedBy(2.dp),
+                maxItemsInEachRow = 6,
                 modifier = Modifier.fillMaxWidth()
             ) {
-                Text("Baud Rate:")
-                Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
-                    baudRates.forEach { rate ->
-                        CardButton(
-                            onClick = { baudRate.intValue = rate },
-                            text = if (rate == baudRate.intValue) "[$rate]" else rate.toString(),
-                            modifier = Modifier
-                        )
-                    }
+                baudRates.forEach { rate ->
+                    FilterChip(
+                        selected = rate == baudRate.intValue,
+                        onClick = { baudRate.intValue = rate },
+                        label = {
+                            Text(
+                                text = baudLabel(rate),
+                                fontSize = 12.sp,
+                                textAlign = TextAlign.Center,
+                                modifier = Modifier.fillMaxWidth()
+                            )
+                        },
+                        enabled = enabled.value,
+                        modifier = Modifier.weight(1f)
+                    )
                 }
             }
+            Spacer(modifier = Modifier.height(6.dp))
         }
     }
 }
+
+private fun compactRadioModelLabel(model: String): String = when (model) {
+    RadioControlSettings.MODEL_YAESU_FT817 -> "FT-817/818"
+    RadioControlSettings.MODEL_YAESU_FT857 -> "FT-857/897"
+    RadioControlSettings.MODEL_ICOM_IC705 -> "IC-705"
+    else -> model
+}
+
+private fun baudLabel(rate: Int): String = when (rate) {
+    4800 -> "4k"
+    9600 -> "9k"
+    19200 -> "19k"
+    38400 -> "38k"
+    57600 -> "57k"
+    115200 -> "115k"
+    else -> rate.toString()
+}

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsScreen.kt

@@ -25,23 +25,22 @@ import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.RowScope
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.IntrinsicSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.grid.GridCells
 import androidx.compose.foundation.lazy.grid.GridItemSpan
 import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
-import androidx.compose.foundation.layout.PaddingValues
-import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.ElevatedCard
-import androidx.compose.material3.ElevatedButton
 import androidx.compose.material3.Icon
 import androidx.compose.material3.LinearProgressIndicator
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Slider
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -60,13 +59,11 @@ import androidx.compose.ui.platform.LocalUriHandler
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
-import com.rtbishop.look4sat.core.domain.model.MapSource
 import com.rtbishop.look4sat.core.domain.model.OtherSettings
 import com.rtbishop.look4sat.core.domain.predict.GeoPos
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
@@ -95,10 +92,22 @@ fun SettingsDestination() {
 @Composable
 private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) -> Unit) {
     val dialogs = rememberDialogVisibility()
+    val pendingCustomSourcesGrant = remember { mutableStateOf<(() -> Unit)?>(null) }
+    val pendingCustomSourcesDeny = remember { mutableStateOf<(() -> Unit)?>(null) }
     val permissions = rememberSettingsPermissions(
         sendAction = onAction,
         onBluetoothGranted = { dialogs.bluetooth = true },
-        onNetworkGranted = { dialogs.network = true }
+        onNetworkGranted = { dialogs.network = true },
+        onCustomSourcesPermissionGranted = {
+            pendingCustomSourcesGrant.value?.invoke()
+            pendingCustomSourcesGrant.value = null
+            pendingCustomSourcesDeny.value = null
+        },
+        onCustomSourcesPermissionDenied = {
+            pendingCustomSourcesDeny.value?.invoke()
+            pendingCustomSourcesGrant.value = null
+            pendingCustomSourcesDeny.value = null
+        }
     )
 
     // Dialogs
@@ -123,6 +132,11 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
             useCustomTransceivers = uiState.dataSourcesSettings.useCustomTransceivers,
             tleUrl = uiState.dataSourcesSettings.tleUrl,
             transceiversUrl = uiState.dataSourcesSettings.transceiversUrl,
+            requestCustomSourcesPermission = { onGranted, onDenied ->
+                pendingCustomSourcesGrant.value = onGranted
+                pendingCustomSourcesDeny.value = onDenied
+                permissions.launchCustomSourcesPermission()
+            },
             onImportTle = { permissions.launchTleImport(); dialogs.dataSources = false },
             onImportTransceivers = { permissions.launchTransceiverImport(); dialogs.dataSources = false },
             onDismiss = { dialogs.dataSources = false },
@@ -135,7 +149,9 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
                     transceiversUrl = if (!useCustomTransceivers || transceiversUrl.isNotBlank()) transceiversUrl else current.transceiversUrl
                 )
                 if (newSettings != current) onAction(SettingsAction.UpdateDataSources(newSettings))
-                if (useCustomTle || useCustomTransceivers) onAction(SettingsAction.UpdateFromWeb)
+                if (newSettings.useCustomTLE || newSettings.useCustomTransceivers) {
+                    onAction(SettingsAction.UpdateFromWeb)
+                }
             }
         )
     }
@@ -177,6 +193,7 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
     if (dialogs.radioControl) {
         RadioControlDialog(
             initialSettings = uiState.radioControlSettings,
+            pairedBluetoothDevices = uiState.pairedBluetoothDevices,
             onDismiss = { dialogs.radioControl = false },
             onSave = { onAction(SettingsAction.UpdateRadioControl(it)) }
         )
@@ -205,7 +222,7 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
                         version = uiState.appVersionName,
                         modifier = Modifier.weight(1f)
                     )
-                    PrimaryIconCard(onClick = { safeOpenUri(donateUrl) }, resId = R.drawable.ic_pound)
+                    PrimaryIconCard(onClick = { safeOpenUri(donateUrl) }, resId = R.drawable.ic_like)
                 }
                 TopBar {
                     Row(modifier = Modifier.weight(1f), horizontalArrangement = Arrangement.spacedBy(6.dp)) {
@@ -227,7 +244,7 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
                 }
             } else {
                 TopBar {
-                    PrimaryIconCard(onClick = { safeOpenUri(donateUrl) }, resId = R.drawable.ic_pound)
+                    PrimaryIconCard(onClick = { safeOpenUri(donateUrl) }, resId = R.drawable.ic_like)
                     TopCard(
                         onClick = { safeOpenUri(appUrl) },
                         version = uiState.appVersionName,
@@ -285,9 +302,22 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
                     onRadioControlClick = { dialogs.radioControl = true }
                 )
             }
-            item { OtherCard(uiState.otherSettings, onAction) }
-            item { MapSettingsCard(uiState.otherSettings, onAction) }
-            item { CardCredits() }
+            item(span = { GridItemSpan(maxLineSpan) }) {
+                if (isVerticalLayout) {
+                    Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                        OtherCard(uiState.otherSettings, onAction)
+                        CardCredits()
+                    }
+                } else {
+                    Row(
+                        horizontalArrangement = Arrangement.spacedBy(6.dp),
+                        modifier = Modifier.fillMaxWidth().height(IntrinsicSize.Min)
+                    ) {
+                        OtherCard(uiState.otherSettings, onAction, modifier = Modifier.weight(1f).fillMaxHeight())
+                        CardCredits(modifier = Modifier.weight(1f).fillMaxHeight())
+                    }
+                }
+            }
         }
     }
 }
@@ -364,7 +394,7 @@ private fun LocationCard(
 @Composable
 private fun DataCardPreview() = MainTheme {
     val settings = DataSettings(true, 5000, 2500, 0L)
-    DataCard(settings = settings, {}, {}, {})
+    DataCard(settings = settings, updateFromWeb = {}, clearAllData = {}, showDataSourcesDialog = {})
 }
 
 @Composable
@@ -466,140 +496,83 @@ private fun OtherCardPreview() = MainTheme {
         shouldSeeWarning = false,
         shouldSeeWhatsNew = false
     )
-    OtherCard(settings = values) {}
+    OtherCard(settings = values, onAction = {})
 }
 
 @Composable
-private fun MapSettingsCard(settings: OtherSettings, onAction: (SettingsAction) -> Unit) {
-    var keyValue by remember(settings.tiandituKey) { mutableStateOf(settings.tiandituKey) }
-    LaunchedEffect(keyValue) {
-        kotlinx.coroutines.delay(400)
-        if (keyValue.trim() != settings.tiandituKey) {
-            onAction(SettingsAction.SetTiandituKey(keyValue))
-        }
-    }
-    ElevatedCard(modifier = Modifier.fillMaxWidth()) {
-        Column(
-            horizontalAlignment = Alignment.CenterHorizontally,
-            modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp)
-        ) {
-            Text(
-                text = stringResource(id = R.string.prefs_map_title),
-                color = MaterialTheme.colorScheme.primary
-            )
-            Spacer(modifier = Modifier.height(6.dp))
-            val currentMapSource = MapSource.normalize(settings.mapSource)
-            MapSourceRow(
-                currentMapSource = currentMapSource,
-                firstSource = MapSource.OSM,
-                firstTitle = stringResource(id = R.string.prefs_map_source_osm),
-                secondSource = MapSource.TIANDITU_VECTOR,
-                secondTitle = stringResource(id = R.string.prefs_map_source_tianditu_vector),
-                onAction = onAction
-            )
-            Spacer(modifier = Modifier.height(6.dp))
-            MapSourceRow(
-                currentMapSource = currentMapSource,
-                firstSource = MapSource.TIANDITU_IMAGE,
-                firstTitle = stringResource(id = R.string.prefs_map_source_tianditu_image),
-                onAction = onAction
-            )
-            Spacer(modifier = Modifier.height(6.dp))
-            OutlinedTextField(
-                value = keyValue,
-                onValueChange = { keyValue = it },
-                label = { Text(text = stringResource(id = R.string.prefs_map_tianditu_key)) },
-                singleLine = true,
-                modifier = Modifier.fillMaxWidth()
-            )
-            Spacer(modifier = Modifier.height(6.dp))
-            CardButton(
-                onClick = { onAction(SettingsAction.SetTiandituKey(keyValue)) },
-                text = stringResource(id = R.string.prefs_map_save_key),
-                modifier = Modifier.fillMaxWidth()
-            )
-        }
-    }
-}
-
-@Composable
-private fun MapSourceRow(
-    currentMapSource: String,
-    firstSource: String,
-    firstTitle: String,
-    secondSource: String? = null,
-    secondTitle: String? = null,
-    onAction: (SettingsAction) -> Unit
-) {
-    Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
-        MapSourceButton(
-            onClick = { onAction(SettingsAction.SetMapSource(firstSource)) },
-            text = firstTitle,
-            selected = currentMapSource == firstSource,
-            modifier = Modifier.weight(1f)
-        )
-        if (secondSource != null && secondTitle != null) {
-            MapSourceButton(
-                onClick = { onAction(SettingsAction.SetMapSource(secondSource)) },
-                text = secondTitle,
-                selected = currentMapSource == secondSource,
-                modifier = Modifier.weight(1f)
-            )
-        } else {
-            Spacer(modifier = Modifier.weight(1f))
-        }
-    }
-}
-
-@Composable
-private fun MapSourceButton(onClick: () -> Unit, text: String, selected: Boolean, modifier: Modifier = Modifier) {
-    ElevatedButton(
-        onClick = onClick,
-        colors = ButtonDefaults.buttonColors(
-            containerColor = if (selected) MaterialTheme.colorScheme.primary
-            else MaterialTheme.colorScheme.surfaceVariant,
-            contentColor = if (selected) MaterialTheme.colorScheme.onPrimary
-            else MaterialTheme.colorScheme.onSurfaceVariant
-        ),
-        shape = MaterialTheme.shapes.small,
-        modifier = modifier,
-        contentPadding = PaddingValues(horizontal = 8.dp, vertical = 8.dp)
-    ) {
-        Text(text = text, fontSize = 16.sp, textAlign = TextAlign.Center)
-    }
-}
-
-@Composable
-private fun OtherCard(settings: OtherSettings, onAction: (SettingsAction) -> Unit) {
-    ElevatedCard(
-        modifier = Modifier
-            .fillMaxWidth()
-            .height(268.dp)
-    ) {
+private fun OtherCard(settings: OtherSettings, onAction: (SettingsAction) -> Unit, modifier: Modifier = Modifier) {
+    ElevatedCard(modifier = modifier.fillMaxWidth()) {
         Column(modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp)) {
             Text(
                 text = stringResource(id = R.string.prefs_other_title),
                 color = MaterialTheme.colorScheme.primary
             )
-            SwitchRow(R.string.prefs_other_switch_utc, settings.stateOfUtc) {
-                onAction(SettingsAction.ToggleUtc(it))
+            Spacer(modifier = Modifier.height(4.dp))
+            // Display preferences: UTC clock + night filter
+            Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                SwitchTile(R.string.prefs_other_switch_utc, settings.stateOfUtc) {
+                    onAction(SettingsAction.ToggleUtc(it))
+                }
+                SwitchTile(R.string.prefs_other_switch_night_mode, settings.stateOfNightMode) {
+                    onAction(SettingsAction.ToggleNightMode(it))
+                }
             }
+            Spacer(modifier = Modifier.height(4.dp))
+            // Radar behavior: sweep animation + sensor control
+            Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                SwitchTile(R.string.prefs_other_switch_sweep, settings.stateOfSweep) {
+                    onAction(SettingsAction.ToggleSweep(it))
+                }
+                SwitchTile(R.string.prefs_other_switch_sensors, settings.stateOfSensors) {
+                    onAction(SettingsAction.ToggleSensor(it))
+                }
+            }
+            Spacer(modifier = Modifier.height(4.dp))
+            // Data management (full width)
             SwitchRow(R.string.prefs_other_switch_update, settings.stateOfAutoUpdate) {
                 onAction(SettingsAction.ToggleUpdate(it))
             }
-            SwitchRow(R.string.prefs_other_switch_sweep, settings.stateOfSweep) {
-                onAction(SettingsAction.ToggleSweep(it))
-            }
-            SwitchRow(R.string.prefs_other_switch_sensors, settings.stateOfSensors) {
-                onAction(SettingsAction.ToggleSensor(it))
-            }
-            SwitchRow(R.string.prefs_other_switch_night_mode, settings.stateOfNightMode) {
-                onAction(SettingsAction.ToggleNightMode(it))
-            }
+            Spacer(modifier = Modifier.height(4.dp))
+            // Compass calibration sliders at the bottom
+            CompassOffsetRow(
+                labelResId = R.string.prefs_other_compass_offset,
+                value = settings.radarCompassOffset,
+                range = -180f..180f
+            ) { onAction(SettingsAction.SetRadarCompassOffset(it)) }
+            Spacer(modifier = Modifier.height(4.dp))
+            CompassOffsetRow(
+                labelResId = R.string.prefs_other_compass_offset_elev,
+                value = settings.radarCompassOffsetElev,
+                range = -90f..90f
+            ) { onAction(SettingsAction.SetRadarCompassOffsetElev(it)) }
+            Spacer(modifier = Modifier.height(4.dp))
         }
     }
 }
 
+@Composable
+private fun CompassOffsetRow(
+    labelResId: Int,
+    value: Float,
+    range: ClosedFloatingPointRange<Float>,
+    onValueChange: (Float) -> Unit
+) {
+    Row(
+        horizontalArrangement = Arrangement.SpaceBetween,
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier.fillMaxWidth()
+    ) {
+        Text(text = stringResource(id = labelResId))
+        Text(text = "${value.toInt()}°")
+    }
+    Spacer(modifier = Modifier.height(4.dp))
+    Slider(
+        value = value,
+        onValueChange = onValueChange,
+        valueRange = range
+    )
+}
+
 @Composable
 private fun SwitchRow(labelResId: Int, checked: Boolean, onCheckedChange: (Boolean) -> Unit) {
     Row(
@@ -612,6 +585,21 @@ private fun SwitchRow(labelResId: Int, checked: Boolean, onCheckedChange: (Boole
     }
 }
 
+@Composable
+private fun RowScope.SwitchTile(labelResId: Int, checked: Boolean, onCheckedChange: (Boolean) -> Unit) {
+    Row(
+        horizontalArrangement = Arrangement.SpaceBetween,
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier.weight(1f)
+    ) {
+        Text(
+            text = stringResource(id = labelResId),
+            modifier = Modifier.weight(1f)
+        )
+        Switch(checked = checked, onCheckedChange = onCheckedChange)
+    }
+}
+
 @Composable
 private fun formatUpdateTime(updateTime: Long): String {
     val timePattern = stringResource(id = R.string.prefs_updated_time)
@@ -646,7 +634,6 @@ private fun CardCredits(modifier: Modifier = Modifier) {
     ElevatedCard(
         modifier = modifier
             .fillMaxWidth()
-            .height(268.dp)
     ) {
         Column(
             verticalArrangement = Arrangement.SpaceBetween,
@@ -760,14 +747,17 @@ private class SettingsPermissions(
     val launchTleImport: () -> Unit,
     val launchTransceiverImport: () -> Unit,
     val launchBluetooth: () -> Unit,
-    val launchNetwork: () -> Unit
+    val launchNetwork: () -> Unit,
+    val launchCustomSourcesPermission: () -> Unit
 )
 
 @Composable
 private fun rememberSettingsPermissions(
     sendAction: (SettingsAction) -> Unit,
     onBluetoothGranted: () -> Unit,
-    onNetworkGranted: () -> Unit
+    onNetworkGranted: () -> Unit,
+    onCustomSourcesPermissionGranted: () -> Unit,
+    onCustomSourcesPermissionDenied: () -> Unit
 ): SettingsPermissions {
     val locationError = stringResource(R.string.prefs_loc_gps_error)
     val locationRequest = rememberLauncherForActivityResult(
@@ -779,12 +769,15 @@ private fun rememberSettingsPermissions(
         else sendAction(SettingsAction.ShowToast(locationError))
     }
 
+    val satellitesImportError = stringResource(R.string.prefs_data_import_satellites_error)
+    val transceiversImportError = stringResource(R.string.prefs_data_import_transceivers_error)
+
     val tleRequest = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri ->
-        uri?.let { sendAction(SettingsAction.UpdateTLEFromFile(it.toString())) }
+        uri?.let { sendAction(SettingsAction.UpdateTLEFromFile(it.toString(), satellitesImportError)) }
     }
 
     val transceiversRequest = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri ->
-        uri?.let { sendAction(SettingsAction.UpdateTransceiversFromFile(it.toString())) }
+        uri?.let { sendAction(SettingsAction.UpdateTransceiversFromFile(it.toString(), transceiversImportError)) }
     }
 
     val bluetoothError = stringResource(R.string.prefs_bt_perm_error)
@@ -801,6 +794,15 @@ private fun rememberSettingsPermissions(
         else sendAction(SettingsAction.ShowToast(networkError))
     }
 
+    val customSourcesRequest = rememberLauncherForActivityResult(ActivityResultContracts.RequestPermission()) { granted ->
+        if (granted) {
+            onCustomSourcesPermissionGranted()
+        } else {
+            onCustomSourcesPermissionDenied()
+            sendAction(SettingsAction.ShowToast(networkError))
+        }
+    }
+
     return remember {
         SettingsPermissions(
             launchLocation = {
@@ -817,6 +819,13 @@ private fun rememberSettingsPermissions(
                 } else {
                     onNetworkGranted()
                 }
+            },
+            launchCustomSourcesPermission = {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.CINNAMON_BUN) {
+                    customSourcesRequest.launch(Manifest.permission.ACCESS_LOCAL_NETWORK)
+                } else {
+                    onCustomSourcesPermissionGranted()
+                }
             }
         )
     }

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsState.kt

@@ -28,7 +28,10 @@ data class PositionSettings(
 )
 
 data class DataSettings(
-    val isUpdating: Boolean, val entriesTotal: Int, val radiosTotal: Int, val timestamp: Long
+    val isUpdating: Boolean,
+    val entriesTotal: Int,
+    val radiosTotal: Int,
+    val timestamp: Long
 )
 
 data class SettingsState(
@@ -38,7 +41,8 @@ data class SettingsState(
     val otherSettings: OtherSettings,
     val rcSettings: RCSettings,
     val radioControlSettings: RadioControlSettings,
-    val dataSourcesSettings: DataSourcesSettings
+    val dataSourcesSettings: DataSourcesSettings,
+    val pairedBluetoothDevices: List<Pair<String, String>> = emptyList()
 )
 
 sealed interface SettingsAction {
@@ -50,8 +54,8 @@ sealed interface SettingsAction {
 
     // Data
     data object UpdateFromWeb : SettingsAction
-    data class UpdateTLEFromFile(val uri: String) : SettingsAction
-    data class UpdateTransceiversFromFile(val uri: String) : SettingsAction
+    data class UpdateTLEFromFile(val uri: String, val invalidFileMessage: String) : SettingsAction
+    data class UpdateTransceiversFromFile(val uri: String, val invalidFileMessage: String) : SettingsAction
     data object ClearAllData : SettingsAction
 
     // Toggles
@@ -61,8 +65,8 @@ sealed interface SettingsAction {
     data class ToggleSensor(val value: Boolean) : SettingsAction
     data class ToggleLightTheme(val value: Boolean) : SettingsAction
     data class ToggleNightMode(val value: Boolean) : SettingsAction
-    data class SetMapSource(val value: String) : SettingsAction
-    data class SetTiandituKey(val value: String) : SettingsAction
+    data class SetRadarCompassOffset(val value: Float) : SettingsAction
+    data class SetRadarCompassOffsetElev(val value: Float) : SettingsAction
 
     // Remote control
     data class UpdateRC(val settings: RCSettings) : SettingsAction

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsViewModel.kt

@@ -32,6 +32,7 @@ import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 
 class SettingsViewModel(
+    private val container: IMainContainer,
     private val databaseRepo: IDatabaseRepo,
     private val settingsRepo: ISettingsRepo,
     private val showToast: IShowToast
@@ -47,7 +48,8 @@ class SettingsViewModel(
             otherSettings = settingsRepo.otherSettings.value,
             rcSettings = settingsRepo.rcSettings.value,
             radioControlSettings = settingsRepo.radioControlSettings.value,
-            dataSourcesSettings = settingsRepo.dataSourcesSettings.value
+            dataSourcesSettings = settingsRepo.dataSourcesSettings.value,
+            pairedBluetoothDevices = container.providePairedBluetoothDevices()
         )
     )
 
@@ -65,11 +67,11 @@ class SettingsViewModel(
             settingsRepo.databaseState.collect { state ->
                 _uiState.update {
                     it.copy(
-                        dataSettings = DataSettings(
-                            false,
-                            state.numberOfSatellites,
-                            state.numberOfRadios,
-                            state.updateTimestamp
+                        dataSettings = it.dataSettings.copy(
+                            isUpdating = false,
+                            entriesTotal = state.numberOfSatellites,
+                            radiosTotal = state.numberOfRadios,
+                            timestamp = state.updateTimestamp
                         )
                     )
                 }
@@ -107,11 +109,11 @@ class SettingsViewModel(
             SettingsAction.DismissPosMessages -> dismissPosMessage()
             // Data
             SettingsAction.UpdateFromWeb -> runDataUpdate { databaseRepo.updateFromRemote() }
-            is SettingsAction.UpdateTLEFromFile -> runDataUpdate { databaseRepo.updateTLEFromFile(action.uri) }
-            is SettingsAction.UpdateTransceiversFromFile -> runDataUpdate {
-                databaseRepo.updateTransceiversFromFile(
-                    action.uri
-                )
+            is SettingsAction.UpdateTLEFromFile -> runManualImport(action.invalidFileMessage) {
+                databaseRepo.updateTLEFromFile(action.uri)
+            }
+            is SettingsAction.UpdateTransceiversFromFile -> runManualImport(action.invalidFileMessage) {
+                databaseRepo.updateTransceiversFromFile(action.uri)
             }
             SettingsAction.ClearAllData -> viewModelScope.launch { databaseRepo.clearAllData() }
             // Toggles
@@ -121,8 +123,8 @@ class SettingsViewModel(
             is SettingsAction.ToggleSensor -> settingsRepo.updateOtherSettings { it.copy(stateOfSensors = action.value) }
             is SettingsAction.ToggleLightTheme -> settingsRepo.updateOtherSettings { it.copy(stateOfLightTheme = action.value) }
             is SettingsAction.ToggleNightMode -> settingsRepo.updateOtherSettings { it.copy(stateOfNightMode = action.value) }
-            is SettingsAction.SetMapSource -> settingsRepo.updateOtherSettings { it.copy(mapSource = action.value) }
-            is SettingsAction.SetTiandituKey -> settingsRepo.updateOtherSettings { it.copy(tiandituKey = action.value.trim()) }
+            is SettingsAction.SetRadarCompassOffset -> settingsRepo.updateOtherSettings { it.copy(radarCompassOffset = action.value) }
+            is SettingsAction.SetRadarCompassOffsetElev -> settingsRepo.updateOtherSettings { it.copy(radarCompassOffsetElev = action.value) }
             // Remote control & data sources
             is SettingsAction.UpdateRC -> settingsRepo.updateRCSettings(action.settings)
             is SettingsAction.UpdateRadioControl -> settingsRepo.updateRadioControlSettings(action.settings)
@@ -186,12 +188,27 @@ class SettingsViewModel(
         }
     }
 
+    private fun runManualImport(importErrorMessage: String, block: suspend () -> Int) {
+        viewModelScope.launch {
+            try {
+                _uiState.update { it.copy(dataSettings = it.dataSettings.copy(isUpdating = true)) }
+                if (block() == 0) showToast(importErrorMessage)
+            } catch (exception: Exception) {
+                _uiState.update { it.copy(dataSettings = it.dataSettings.copy(isUpdating = false)) }
+                println(exception)
+            }
+        }
+    }
+
+
     // endregion
 
     companion object {
+
         fun factory(container: IMainContainer) = viewModelFactory {
             initializer {
                 SettingsViewModel(
+                    container = container,
                     databaseRepo = container.databaseRepo,
                     settingsRepo = container.settingsRepo,
                     showToast = container.provideShowToast()

feature/status/build.gradle.kts

@@ -0,0 +1,17 @@
+import com.android.build.api.dsl.LibraryExtension
+
+plugins {
+    alias(libs.plugins.convention.featurePlugin)
+}
+
+android {
+    namespace = "com.rtbishop.look4sat.feature.status"
+    compileOptions {
+        encoding = "UTF-8"
+    }
+}
+
+dependencies {
+    implementation(project(":core:domain"))
+    implementation(project(":core:presentation"))
+}

feature/status/src/main/java/com/rtbishop/look4sat/feature/status/SatStatusScreen.kt

@@ -0,0 +1,370 @@
+package com.rtbishop.look4sat.feature.status
+
+import androidx.compose.animation.core.RepeatMode
+import androidx.compose.animation.core.animateFloat
+import androidx.compose.animation.core.infiniteRepeatable
+import androidx.compose.animation.core.rememberInfiniteTransition
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.navigationBarsPadding
+import androidx.compose.foundation.layout.statusBarsPadding
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.ui.graphics.ColorFilter
+import androidx.compose.ui.res.painterResource
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.draw.rotate
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.rtbishop.look4sat.core.domain.model.SatDay
+import com.rtbishop.look4sat.core.domain.model.SatReport
+import com.rtbishop.look4sat.core.domain.model.SatSlot
+import com.rtbishop.look4sat.core.domain.model.SatStatus
+import com.rtbishop.look4sat.core.domain.repository.IMainContainer
+import com.rtbishop.look4sat.core.presentation.R
+import com.rtbishop.look4sat.feature.status.R as StatusR
+import java.util.Calendar
+
+/**
+ * Map AMSAT status text to Material3 colorScheme colors.
+ * Addresses PR #233 review: use colorScheme instead of hardcoded Color() constants.
+ */
+@Composable
+private fun statusColorOf(statusText: String): Color {
+    return when {
+        statusText.contains("Heard", ignoreCase = true) && !statusText.contains("Not", ignoreCase = true) ->
+            MaterialTheme.colorScheme.tertiary // Active
+        statusText.contains("Telemetry", ignoreCase = true) || statusText.contains("Beacon", ignoreCase = true) ->
+            MaterialTheme.colorScheme.tertiaryContainer // Telemetry
+        statusText.contains("Not Heard", ignoreCase = true) ->
+            Color(0xFFDC267F) // NotHeard pink (no semantic slot)
+        else ->
+            MaterialTheme.colorScheme.error // Conflict
+    }
+}
+
+private val NoReportGray = Color(0xFFC0C0C0) // Neutral state
+
+@Composable
+fun SatStatusScreen(container: IMainContainer) {
+    val viewModel: SatStatusViewModel = viewModel(factory = SatStatusViewModel.factory(container))
+    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+    var selectedDay by remember { mutableStateOf<Pair<SatStatus, SatDay>?>(null) }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .statusBarsPadding()
+            .navigationBarsPadding()
+            .padding(horizontal = 8.dp)
+    ) {
+        // Top: legend + refresh
+        StatusHeader(
+            fetchedAtUtcMs = uiState.fetchedAtUtcMs,
+            isRefreshing = uiState.isRefreshing,
+            onRefresh = { viewModel.refresh() }
+        )
+        LegendRow()
+
+        when {
+            uiState.isLoading -> {
+                Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                    CircularProgressIndicator()
+                }
+            }
+            uiState.error != null && uiState.statuses.isEmpty() -> {
+                Column(
+                    modifier = Modifier.fillMaxSize(),
+                    verticalArrangement = Arrangement.Center,
+                    horizontalAlignment = Alignment.CenterHorizontally
+                ) {
+                    Text(
+                        text = stringResource(id = R.string.amsat_load_failed),
+                        color = MaterialTheme.colorScheme.error
+                    )
+                    TextButton(onClick = { viewModel.refresh() }) {
+                        Text(text = stringResource(id = R.string.amsat_retry))
+                    }
+                }
+            }
+            else -> {
+                // Header
+                HeaderRow(statuses = uiState.statuses)
+                HorizontalDivider(thickness = 1.dp)
+                // Row
+                LazyColumn(
+                    modifier = Modifier.fillMaxSize(),
+                    contentPadding = PaddingValues(bottom = 16.dp)
+                ) {
+                    items(uiState.statuses, key = { it.name }) { status ->
+                        StatusRow(
+                            status = status,
+                            onClickDay = { day -> selectedDay = status to day }
+                        )
+                    }
+                }
+            }
+        }
+    }
+
+    selectedDay?.let { (status, day) ->
+        ReportDialog(
+            statusName = status.name,
+            day = day,
+            reports = uiState.reports,
+            onDismiss = { selectedDay = null }
+        )
+    }
+}
+
+/** Top: update time + refresh button (spinner while loading) */
+@Composable
+private fun StatusHeader(
+    fetchedAtUtcMs: Long,
+    isRefreshing: Boolean,
+    onRefresh: () -> Unit
+) {
+    val infiniteTransition = rememberInfiniteTransition(label = "refresh")
+    val angle by infiniteTransition.animateFloat(
+        initialValue = 0f,
+        targetValue = 360f,
+        animationSpec = infiniteRepeatable(tween(800), RepeatMode.Restart),
+        label = "angle"
+    )
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 6.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        Text(
+            text = if (fetchedAtUtcMs > 0) stringResource(id = R.string.amsat_updated) + " " + formatFetchedAt(fetchedAtUtcMs) else stringResource(id = R.string.amsat_title),
+            fontSize = 13.sp,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.weight(1f)
+        )
+        Box(
+            modifier = Modifier
+                .size(34.dp)
+                .clip(CircleShape)
+                .background(MaterialTheme.colorScheme.surfaceVariant)
+                .clickable(onClick = onRefresh),
+            contentAlignment = Alignment.Center
+        ) {
+            if (isRefreshing) {
+                CircularProgressIndicator(modifier = Modifier.size(18.dp), strokeWidth = 2.dp)
+            } else {
+                Image(
+                    painter = painterResource(id = StatusR.drawable.ic_refresh),
+                    contentDescription = stringResource(id = R.string.amsat_refresh),
+                    modifier = Modifier
+                        .size(18.dp)
+                        .rotate(angle),
+                    colorFilter = ColorFilter.tint(MaterialTheme.colorScheme.primary)
+                )
+            }
+        }
+    }
+}
+
+/** Legend (official four colors) */
+@Composable
+private fun LegendRow() {
+    val legend = listOf(
+        stringResource(id = R.string.amsat_active) to MaterialTheme.colorScheme.tertiary,
+        stringResource(id = R.string.amsat_tlm) to MaterialTheme.colorScheme.tertiaryContainer,
+        stringResource(id = R.string.amsat_not_heard) to Color(0xFFDC267F),
+        stringResource(id = R.string.amsat_conflict) to MaterialTheme.colorScheme.error
+    )
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
+        horizontalArrangement = Arrangement.spacedBy(8.dp)
+    ) {
+        legend.forEach { (label, color) ->
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Box(
+                    modifier = Modifier
+                        .size(10.dp)
+                        .clip(RoundedCornerShape(2.dp))
+                        .background(color)
+                )
+                Spacer(modifier = Modifier.width(3.dp))
+                Text(text = label, fontSize = 10.sp, color = MaterialTheme.colorScheme.onSurfaceVariant)
+            }
+        }
+    }
+}
+
+/** Header: satellite name + 6 day dates */
+@Composable
+private fun HeaderRow(statuses: List<SatStatus>) {
+    val dates = statuses.firstOrNull()?.days?.map { it.dateLabel } ?: emptyList()
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 4.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        Text(
+            text = stringResource(id = R.string.amsat_name),
+            fontSize = 11.sp,
+            fontWeight = FontWeight.Bold,
+            color = MaterialTheme.colorScheme.primary,
+            modifier = Modifier.weight(2f).padding(start = 4.dp)
+        )
+        dates.forEach { date ->
+            Text(
+                text = date,
+                fontSize = 10.sp,
+                fontWeight = FontWeight.Bold,
+                textAlign = TextAlign.Center,
+                color = MaterialTheme.colorScheme.primary,
+                modifier = Modifier.weight(0.8f)
+            )
+        }
+    }
+}
+
+/** Satellite row: name + 6 day color blocks (displays the newest non-gray status) */
+@Composable
+private fun StatusRow(status: SatStatus, onClickDay: (SatDay) -> Unit) {
+    val noReportGray = 0xFFC0C0C0L
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(vertical = 3.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        Text(
+            text = status.name,
+            fontSize = 11.sp,
+            maxLines = 1,
+            overflow = androidx.compose.ui.text.style.TextOverflow.Ellipsis,
+            modifier = Modifier.weight(2f).padding(start = 4.dp)
+        )
+        status.days.forEach { day ->
+            val slot = day.slots.firstOrNull { it.statusColor != noReportGray } ?: day.slots.first()
+            DayCell(
+                slot = slot,
+                modifier = Modifier.weight(0.8f).padding(horizontal = 1.dp),
+                onClick = { onClickDay(day) }
+            )
+        }
+    }
+}
+
+/** Day block: newest reported status among the day's 12 slots; gray when none */
+@Composable
+private fun DayCell(slot: SatSlot, modifier: Modifier, onClick: () -> Unit) {
+    val color = Color(slot.statusColor)
+    Box(
+        modifier = modifier
+            .height(24.dp)
+            .clip(RoundedCornerShape(4.dp))
+            .background(color)
+            .clickable(onClick = onClick),
+        contentAlignment = Alignment.Center
+    ) {
+        if (slot.count > 0) {
+            Text(
+                text = slot.count.toString(),
+                fontSize = 11.sp,
+                fontWeight = FontWeight.Bold,
+                color = Color.White
+            )
+        }
+    }
+}
+
+/** Report detail dialog (3 levels: callsign/date/time/grid) */
+@Composable
+private fun ReportDialog(
+    statusName: String,
+    day: SatDay,
+    reports: Map<String, SatReport>,
+    onDismiss: () -> Unit
+) {
+    val dayReports = day.slots.flatMap { it.reportIds }
+        .mapNotNull { reports[it] }
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(text = "$statusName · ${day.dateLabel}") },
+        text = {
+            if (dayReports.isEmpty()) {
+                Text(stringResource(id = R.string.amsat_no_reports))
+            } else {
+                LazyColumn(modifier = Modifier.height(320.dp)) {
+                    items(dayReports) { report ->
+                        Column(modifier = Modifier.fillMaxWidth().padding(vertical = 4.dp)) {
+                            Row(verticalAlignment = Alignment.CenterVertically) {
+                                Box(
+                                    modifier = Modifier
+                                        .size(8.dp)
+                                        .clip(CircleShape)
+                                        .background(statusColorOf(report.statusText))
+                                )
+                                Spacer(modifier = Modifier.width(6.dp))
+                                Text(
+                                    text = report.statusText,
+                                    fontSize = 13.sp,
+                                    fontWeight = FontWeight.Bold
+                                )
+                            }
+                            Text(
+                                text = "${report.call}  ${report.dateUtc}  ${report.timeUtc}" +
+                                    if (report.grid.isNotBlank() && report.grid != "-") "  ${report.grid}" else "",
+                                fontSize = 12.sp,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant
+                            )
+                        }
+                        HorizontalDivider(thickness = 0.5.dp)
+                    }
+                }
+            }
+        },
+        confirmButton = {
+            TextButton(onClick = onDismiss) { Text(stringResource(id = R.string.amsat_close)) }
+        }
+    )
+}
+
+
+private fun formatFetchedAt(utcMs: Long): String {
+    val cal = Calendar.getInstance()
+    cal.timeInMillis = utcMs
+    return "%02d-%02d %02d:%02d".format(
+        cal.get(Calendar.MONTH) + 1, cal.get(Calendar.DAY_OF_MONTH),
+        cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE)
+    )
+}

feature/status/src/main/java/com/rtbishop/look4sat/feature/status/SatStatusViewModel.kt

@@ -0,0 +1,94 @@
+package com.rtbishop.look4sat.feature.status
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import com.rtbishop.look4sat.core.domain.model.SatReport
+import com.rtbishop.look4sat.core.domain.model.SatStatus
+import com.rtbishop.look4sat.core.domain.repository.IMainContainer
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+
+data class SatStatusUiState(
+    val isLoading: Boolean = false,
+    val isRefreshing: Boolean = false,
+    val statuses: List<SatStatus> = emptyList(),
+    val reports: Map<String, SatReport> = emptyMap(),
+    val fetchedAtUtcMs: Long = 0L,
+    val error: String? = null
+)
+
+class SatStatusViewModel(
+    private val container: IMainContainer
+) : ViewModel() {
+
+    private val _uiState = MutableStateFlow(SatStatusUiState(isLoading = true))
+    val uiState: StateFlow<SatStatusUiState> = _uiState
+
+    init {
+        fetch()
+    }
+
+    fun fetch() {
+        viewModelScope.launch {
+            _uiState.update { it.copy(isLoading = true, error = null) }
+            try {
+                val page = container.amSatRepo.fetchStatus()
+                if (page != null && page.statuses.isNotEmpty()) {
+                    _uiState.update {
+                        it.copy(
+                            isLoading = false,
+                            isRefreshing = false,
+                            statuses = page.statuses,
+                            reports = page.reports,
+                            fetchedAtUtcMs = page.fetchedAtUtcMs
+                        )
+                    }
+                } else {
+                    _uiState.update {
+                        it.copy(isLoading = false, isRefreshing = false, error = "fetch_failed")
+                    }
+                }
+            } catch (exception: Exception) {
+                _uiState.update {
+                    it.copy(isLoading = false, isRefreshing = false, error = exception.message ?: "fetch_failed")
+                }
+            }
+        }
+    }
+
+    fun refresh() {
+        if (_uiState.value.isRefreshing) return
+        _uiState.update { it.copy(isRefreshing = true, error = null) }
+        viewModelScope.launch {
+            try {
+                val page = container.amSatRepo.fetchStatus()
+                if (page != null && page.statuses.isNotEmpty()) {
+                    _uiState.update {
+                        it.copy(
+                            isRefreshing = false,
+                            statuses = page.statuses,
+                            reports = page.reports,
+                            fetchedAtUtcMs = page.fetchedAtUtcMs
+                        )
+                    }
+                } else {
+                    _uiState.update { it.copy(isRefreshing = false, error = "fetch_failed") }
+                }
+            } catch (exception: Exception) {
+                _uiState.update { it.copy(isRefreshing = false, error = exception.message ?: "fetch_failed") }
+            }
+        }
+    }
+
+    companion object {
+        fun factory(container: IMainContainer) = viewModelFactory {
+            initializer {
+                SatStatusViewModel(container)
+            }
+        }
+    }
+}

feature/status/src/main/res/drawable/ic_refresh.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Standard Material refresh icon (24dp viewport), centered geometry -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+>
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M17.65,6.35C16.2,4.9 14.21,4 12,4c-4.42,0 -7.99,3.58 -7.99,8s3.57,8 7.99,8c3.73,0 6.84,-2.55 7.73,-6h-2.08c-0.82,2.33 -3.04,4 -5.65,4 -3.31,0 -6,-2.69 -6,-6s2.69,-6 6,-6c1.66,0 3.14,0.69 4.22,1.78L13,11h7V4l-2.35,2.35z" />
+</vector>

gradle.properties

@@ -2,7 +2,5 @@
 org.gradle.caching=true
 org.gradle.jvmargs=-Xmx6g -XX:MaxMetaspaceSize=1g -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
 org.gradle.parallel=true
-org.gradle.workers.max=4
-
-# Enabled parallel sync for Gradle 9.4+
 org.gradle.tooling.parallel=true
+org.gradle.workers.max=4

gradle/libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 #noinspection UnusedVersionCatalogEntry
-appVersionCode = "443"
+appVersionCode = "445"
 #noinspection UnusedVersionCatalogEntry
-appVersionName = "4.4.3"
+appVersionName = "4.4.5"
 #noinspection UnusedVersionCatalogEntry
 compileSdk = "37"
 #noinspection UnusedVersionCatalogEntry
@@ -10,22 +10,22 @@ minSdk = "24"
 #noinspection UnusedVersionCatalogEntry
 jdkVersion = "21"
 #noinspection UnusedVersionCatalogEntry
-packageName = "cn.bh2vsq.look4sat"
+packageName = "com.rtbishop.look4sat"
 
-android-gradle-plugin = "9.2.1"
+android-gradle-plugin = "9.3.1"
 
 androidx-core-ktx = "1.19.0"
 androidx-core-splashscreen = "1.2.0"
 androidx-room = "2.8.4"
 
-compose-bom = "2026.06.00"
+compose-bom = "2026.06.01"
 compose-activity = "1.13.0"
 compose-lifecycle = "2.11.0"
-compose-navigation3 = "1.1.3"
+compose-navigation3 = "1.1.5"
 
-google-ksp = "2.3.8"
+google-ksp = "2.3.10"
 
-kotlin = "2.4.0"
+kotlin = "2.4.10"
 kotlin-coroutines = "1.11.0"
 kotlin-serialization = "1.11.0"
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,7 +1,7 @@
 #Sat Jun 27 12:51:12 BST 2026
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://mirrors.aliyun.com/gradle/distributions/v9.6.1/gradle-9.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

settings.gradle.kts

@@ -25,5 +25,6 @@ include(
     ":feature:passes",
     ":feature:radar",
     ":feature:satellites",
-    ":feature:settings"
+    ":feature:settings",
+    ":feature:status"
 )