v4.4.6 - AMSAT status page, fully customizable data sources

Co-authored-by: atsunatsu <atsunatsu@users.noreply.github.com>

.gitignore

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

README.md

@@ -36,10 +36,10 @@ It is now and always will be completely ad-free and open-source.
 
 ## Star History
 
-<a href="https://www.star-history.com/?repos=rt-bishop%2FLook4Sat&type=timeline&legend=top-left">
+<a href="https://star-history.dera.page/#rt-bishop/Look4Sat&type=timeline&legend=top-left">
  <picture>
-   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/chart?repos=rt-bishop/Look4Sat&type=timeline&theme=dark&legend=top-left" />
-   <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/chart?repos=rt-bishop/Look4Sat&type=timeline&legend=top-left" />
-   <img alt="Star History Chart" src="https://api.star-history.com/chart?repos=rt-bishop/Look4Sat&type=timeline&legend=top-left" />
+   <source media="(prefers-color-scheme: dark)" srcset="https://star-history.dera.page/svg?repos=rt-bishop/Look4Sat&type=timeline&theme=dark&legend=top-left" />
+   <source media="(prefers-color-scheme: light)" srcset="https://star-history.dera.page/svg?repos=rt-bishop/Look4Sat&type=timeline&legend=top-left" />
+   <img alt="Star History Chart" src="https://star-history.dera.page/svg?repos=rt-bishop/Look4Sat&type=timeline&legend=top-left" />
  </picture>
 </a>

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

@@ -49,7 +49,7 @@ class MainActivity : ComponentActivity() {
         super.onCreate(savedInstanceState)
         observeNightFilterState()
         setContent {
-            MainTheme(isDarkTheme = true) { MainScreen() }
+            MainTheme(isDarkTheme = true) { NavRoot() }
         }
     }
 

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

@@ -25,8 +25,6 @@ import androidx.compose.animation.core.rememberInfiniteTransition
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
-import androidx.compose.animation.scaleIn
-import androidx.compose.animation.scaleOut
 import androidx.compose.animation.slideInHorizontally
 import androidx.compose.animation.slideOutHorizontally
 import androidx.compose.animation.togetherWith
@@ -44,7 +42,7 @@ import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteDefaults
 import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteScaffold
@@ -70,6 +68,7 @@ import androidx.navigation3.runtime.rememberNavBackStack
 import androidx.navigation3.runtime.rememberSaveableStateHolderNavEntryDecorator
 import androidx.navigation3.ui.NavDisplay
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
+import com.rtbishop.look4sat.core.domain.repository.RadioTrackingState
 import com.rtbishop.look4sat.core.presentation.DeeplinkResolver
 import com.rtbishop.look4sat.core.presentation.ElevationThresholds
 import com.rtbishop.look4sat.core.presentation.LocalElevationThresholds
@@ -82,37 +81,42 @@ import com.rtbishop.look4sat.feature.passes.PassesDestination
 import com.rtbishop.look4sat.feature.radar.RadarDestination
 import com.rtbishop.look4sat.feature.satellites.SatellitesDestination
 import com.rtbishop.look4sat.feature.settings.SettingsDestination
+import com.rtbishop.look4sat.feature.status.SatStatusDestination
 
 @Composable
 fun NavRoot(deeplink: String? = null) {
     val rootBackStack = rememberNavBackStack(Screen.Passes)
     val deeplinkResolver = DeeplinkResolver()
     LaunchedEffect(deeplink) {
-        deeplink?.let {
-            val destination = deeplinkResolver.resolve(it) // rootBackStack.clear()
-            rootBackStack.add(destination)
-        }
+        deeplink?.let { rootBackStack.add(deeplinkResolver.resolve(it)) }
     }
     val navigateBack: () -> Unit = { rootBackStack.removeLastOrNull() }
-    val slideInTransition = slideInHorizontally(initialOffsetX = { it }) togetherWith scaleOut(targetScale = 0.9f)
-    val slideOutTransition = scaleIn(initialScale = 0.9f) togetherWith slideOutHorizontally(targetOffsetX = { it })
+    val navigateToRadar: () -> Unit = { rootBackStack.add(RadarDestination) }
+    // Incoming screen slides in from the right, outgoing drifts left at 1/3 speed (API35+ style)
+    val pushTransition = slideInHorizontally(tween(300)) { it } togetherWith
+        slideOutHorizontally(tween(300)) { -it / 3 }
+    // Reverse: outgoing slides out to the right, incoming drifts in from the left
+    val popTransition = slideInHorizontally(tween(300)) { -it / 3 } togetherWith
+        slideOutHorizontally(tween(300)) { it }
     NavDisplay(
         modifier = Modifier.fillMaxSize(),
         backStack = rootBackStack,
         onBack = navigateBack,
-        transitionSpec = { slideInTransition },
-        popTransitionSpec = { slideOutTransition },
-        predictivePopTransitionSpec = { slideOutTransition },
+        transitionSpec = { pushTransition },
+        popTransitionSpec = { popTransition },
+        predictivePopTransitionSpec = { popTransition },
         entryDecorators = listOf(
-            rememberSaveableStateHolderNavEntryDecorator(), // Required for saving Compose state per entry
-            rememberViewModelStoreNavEntryDecorator() // Required for ViewModel scoping per entry
+            rememberSaveableStateHolderNavEntryDecorator(),
+            rememberViewModelStoreNavEntryDecorator()
         ),
         entryProvider = entryProvider {
-            entry<Screen.Passes> { MainScreen(navigateToRadar = { rootBackStack.add(RadarDestination) }) }
+            entry<Screen.Passes> { MainScreen(navigateToRadar = navigateToRadar) }
             entry<RadarDestination> {
-                Scaffold { innerPadding ->
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
                     RadarDestination(navigateUp = navigateBack)
-                    innerPadding.calculateTopPadding()
                 }
             }
         }
@@ -120,18 +124,20 @@ fun NavRoot(deeplink: String? = null) {
 }
 
 @Composable
-fun MainScreen(navigateToRadar: () -> Unit = {}) {
-    val backStack = rememberNavBackStack(Screen.Passes)
-    val currentKey = backStack.lastOrNull()
-    val navigateBack: () -> Unit = { backStack.removeLastOrNull() }
-    val fadeTransition = fadeIn(animationSpec = tween(350)) togetherWith fadeOut(animationSpec = tween(350))
-    val navItems = listOf(Screen.Satellites, Screen.Passes, Screen.Radar, Screen.Map, Screen.Settings)
-
+private 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()
 
+    val backStack = rememberNavBackStack(Screen.Passes)
+    val currentKey = backStack.lastOrNull()
+    val navigateBack: () -> Unit = { backStack.removeLastOrNull() }
+    val fadeTransition = fadeIn(animationSpec = tween(300)) togetherWith
+        fadeOut(animationSpec = tween(300))
+    val navItems =
+        listOf(Screen.Satellites, Screen.Passes, Screen.Status, Screen.Map, Screen.Settings)
+
     CompositionLocalProvider(
         LocalElevationThresholds provides ElevationThresholds(
             low = otherSettings.lowElevation,
@@ -144,13 +150,18 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
                     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.Status -> screen is Screen.Status
                         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)) },
+                        icon = {
+                            Icon(
+                                painter = painterResource(screen.iconResId),
+                                contentDescription = stringResource(screen.titleResId)
+                            )
+                        },
                         label = { Text(stringResource(screen.titleResId)) },
                         selected = isSelected,
                         onClick = {
@@ -179,9 +190,7 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
                     popTransitionSpec = { fadeTransition },
                     predictivePopTransitionSpec = { fadeTransition },
                     entryDecorators = listOf(
-                        // Required for saving Compose state per entry
                         rememberSaveableStateHolderNavEntryDecorator(),
-                        // Required for ViewModel scoping per entry
                         rememberViewModelStoreNavEntryDecorator()
                     ),
                     entryProvider = entryProvider {
@@ -191,69 +200,71 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
                         entry<Screen.Passes> {
                             PassesDestination { catNum, aosTime ->
                                 container.satelliteRepo.selectPass(catNum, aosTime)
-                                backStack.add(Screen.Radar)
-//                            navigateToRadar()
+                                navigateToRadar()
                             }
                         }
-                        entry<Screen.Radar> {
-                            RadarDestination(navigateUp = navigateBack)
-                        }
-                        entry<Screen.Map> {
-                            MapDestination()
-                        }
-                        entry<Screen.Settings> {
-                            SettingsDestination()
-                        }
+                        entry<Screen.Status> { SatStatusDestination() }
+                        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)
-                                    backStack.add(Screen.Radar)
-                                }
+                    TrackingBanner(
+                        state = trackingState,
+                        onClick = {
+                            val pass = trackingState.currentPass
+                            if (pass != null) {
+                                container.satelliteRepo.selectPass(pass.catNum, pass.aosTime)
+                                navigateToRadar()
                             }
-                            .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
-                        )
-                    }
+                        }
+                    )
                 }
             }
         }
     }
 }
+
+@Composable
+private fun TrackingBanner(state: RadioTrackingState, onClick: () -> Unit) {
+    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(onClick = onClick)
+            .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: ${state.currentPass?.name ?: ""}",
+            fontSize = 13.sp,
+            fontWeight = FontWeight.Medium,
+            color = MaterialTheme.colorScheme.onPrimaryContainer,
+            modifier = Modifier.weight(1f)
+        )
+        val connections = listOfNotNull(
+            "TX".takeIf { state.txConnected }, "RX".takeIf { state.rxConnected }
+        )
+        Text(
+            text = connections.joinToString("/"),
+            fontSize = 12.sp,
+            color = MaterialTheme.colorScheme.onPrimaryContainer
+        )
+    }
+}

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

@@ -36,6 +36,7 @@ internal class ApplicationPlugin : Plugin<Project> {
             implementation(project(":feature:radar"))
             implementation(project(":feature:satellites"))
             implementation(project(":feature:settings"))
+            implementation(project(":feature:status"))
             implementation(libs.androidx.core.splashscreen)
             implementation(libs.compose.material3.adaptive)
             implementation(libs.compose.navigation3)

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

@@ -17,8 +17,10 @@
  */
 package com.rtbishop.look4sat.core.data.framework
 
+import com.rtbishop.look4sat.core.domain.model.Constants
 import com.rtbishop.look4sat.core.domain.repository.IReporter
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
@@ -31,18 +33,30 @@ class NetworkReporter(
     private val rotatorServer: String,
     private val rotatorPort: Int,
     private val frequencyServer: String,
-    private val frequencyPort: Int
+    private val frequencyPort: Int,
+    private val frequencyOffsetHz: Long = 0L
 ) : IReporter {
 
     private val writeMutex = Mutex()
+    private val connectionMutex = Mutex()
+    private val frequencyCommands = Channel<String>(Channel.CONFLATED)
 
     private var rotatorSocket: SocketChannel? = null
     private var rotatorConnected = false
-    private var rotatorConnecting = false
 
     private var frequencySocket: SocketChannel? = null
     private var frequencyConnected = false
-    private var frequencyConnecting = false
+
+    init {
+        // Keep only the latest frequency command to avoid stale backlog and effective lag.
+        reporterScope.launch {
+            for (command in frequencyCommands) {
+                ensureFrequencyConnected()
+                if (!frequencyConnected) continue
+                write(frequencySocket, command) { resetFrequencyConnection() }
+            }
+        }
+    }
 
     override fun reportRotation(format: String, azimuth: Double, elevation: Double) {
         reporterScope.launch {
@@ -58,46 +72,43 @@ class NetworkReporter(
     }
 
     override fun reportFrequency(format: String, frequency: Long) {
-        reporterScope.launch {
-            ensureFrequencyConnected()
-            if (!frequencyConnected) return@launch
-            val command = format
-                .replace($$"$FREQ", frequency.toString())
-                .unescapeControlChars()
-            write(frequencySocket, command) { frequencyConnected = false }
-        }
+        val clampedOffset = frequencyOffsetHz.coerceIn(
+            Constants.FREQ_OFFSET_MIN_HZ,
+            Constants.FREQ_OFFSET_MAX_HZ
+        )
+        val correctedFreq = frequency.coerceAtLeast(0L).safeAdd(clampedOffset).coerceAtLeast(0L)
+        val command = format
+            .replace($$"$FREQ", correctedFreq.toString())
+            .unescapeControlChars()
+        frequencyCommands.trySend(command)
     }
 
-    private fun ensureRotatorConnected() {
-        if (rotatorConnected || rotatorConnecting || rotatorServer.isBlank()) return
-        reporterScope.launch {
+    private suspend fun ensureRotatorConnected() {
+        connectionMutex.withLock {
+            if (rotatorConnected || rotatorServer.isBlank()) return
             try {
-                rotatorConnecting = true
+                resetRotatorConnection()
                 rotatorSocket = SocketChannel.open(InetSocketAddress(rotatorServer, rotatorPort))
                 rotatorConnected = true
                 println("NetworkReporter: Rotator connected to $rotatorServer:$rotatorPort")
             } catch (e: Exception) {
                 println("NetworkReporter rotator connect error: ${e.message}")
-                rotatorConnected = false
-            } finally {
-                rotatorConnecting = false
+                resetRotatorConnection()
             }
         }
     }
 
-    private fun ensureFrequencyConnected() {
-        if (frequencyConnected || frequencyConnecting || frequencyServer.isBlank()) return
-        reporterScope.launch {
+    private suspend fun ensureFrequencyConnected() {
+        connectionMutex.withLock {
+            if (frequencyConnected || frequencyServer.isBlank()) return
             try {
-                frequencyConnecting = true
+                resetFrequencyConnection()
                 frequencySocket = SocketChannel.open(InetSocketAddress(frequencyServer, frequencyPort))
                 frequencyConnected = true
                 println("NetworkReporter: Frequency connected to $frequencyServer:$frequencyPort")
             } catch (e: Exception) {
                 println("NetworkReporter frequency connect error: ${e.message}")
-                frequencyConnected = false
-            } finally {
-                frequencyConnecting = false
+                resetFrequencyConnection()
             }
         }
     }
@@ -106,7 +117,9 @@ class NetworkReporter(
         try {
             writeMutex.withLock {
                 val buffer = ByteBuffer.wrap("$command\n".toByteArray())
-                socket?.write(buffer)
+                while (buffer.hasRemaining()) {
+                    socket?.write(buffer)
+                }
             }
         } catch (e: Exception) {
             println("NetworkReporter write error: ${e.message}")
@@ -114,6 +127,32 @@ class NetworkReporter(
         }
     }
 
+    private fun resetRotatorConnection() {
+        rotatorConnected = false
+        closeQuietly(rotatorSocket)
+        rotatorSocket = null
+    }
+
+    private fun resetFrequencyConnection() {
+        frequencyConnected = false
+        closeQuietly(frequencySocket)
+        frequencySocket = null
+    }
+
+    private fun closeQuietly(socket: SocketChannel?) {
+        try {
+            socket?.close()
+        } catch (_: Exception) {}
+    }
+
+    private fun Long.safeAdd(delta: Long): Long {
+        return when {
+            delta > 0 && this > Long.MAX_VALUE - delta -> Long.MAX_VALUE
+            delta < 0 && this < Long.MIN_VALUE - delta -> Long.MIN_VALUE
+            else -> this + delta
+        }
+    }
+
     private fun String.unescapeControlChars(): String =
         replace("\\r", "\r").replace("\\n", "\n").replace("\\t", "\t")
 }

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

@@ -29,6 +29,7 @@ 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
@@ -66,12 +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)
@@ -103,7 +106,8 @@ class MainContainer(private val context: Context) : IMainContainer {
             rc.rotatorAddress,
             rc.rotatorPort.toIntOrNull() ?: 0,
             rc.frequencyAddress,
-            rc.frequencyPort.toIntOrNull() ?: 0
+            rc.frequencyPort.toIntOrNull() ?: 0,
+            rc.frequencyOffsetHz
         )
     }
 

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

@@ -0,0 +1,158 @@
+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
+        // 72h = 3 days; API hard cap is limit=500 regardless of what we send.
+        // 500 records across ~100 catalog satellites ≈ ~1-5 reports/satellite/day — enough for 3 days.
+        // Upgrade path: paginate or request AMSAT to raise the cap if catalog grows beyond ~200 sats.
+        val reportsJson = remoteSource.getAmSatReports(hours = 72, 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 (_: 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 (_: 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 (_: Exception) {
+            0L
+        }
+    }
+
+    /** Build one SatStatus (5 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 3).map { d ->
+            utc.timeInMillis = (nowSec - d * 86400L) * 1000
+            "${monthAbbr[utc.get(Calendar.MONTH)]} ${utc.get(Calendar.DAY_OF_MONTH)}"
+        }
+        return names.map { name ->
+            val slots = (0 until 36).map { slotIdx ->
+                val slotStart = nowSec - (slotIdx + 1) * 7200L
+                val slotEnd = nowSec - slotIdx * 7200L
+                val inSlot = byName[name].orEmpty().filter { it.reportedTimeUtcSec in slotStart until slotEnd }
+                if (inSlot.isEmpty()) {
+                    SatSlot(statusColor = NO_REPORT_GRAY, count = 0)
+                } else {
+                    val newest = inSlot.maxByOrNull { it.reportedTimeUtcSec }!!
+                    SatSlot(
+                        statusColor = statusColorOf(newest.report),
+                        count = inSlot.size,
+                        reportIds = inSlot.map { it.id }
+                    )
+                }
+            }
+            val days = (0 until 3).map { d ->
+                SatDay(dateLabel = labels[d], slots = slots.subList(d * 12, (d + 1) * 12))
+            }
+            SatStatus(name = name, days = days)
+        }
+    }
+
+    private fun toSatReport(r: ApiReport): SatReport {
+        val cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"))
+        cal.timeInMillis = r.reportedTimeUtcSec * 1000
+        val hh = cal.get(Calendar.HOUR_OF_DAY).toString().padStart(2, '0')
+        val mm = cal.get(Calendar.MINUTE).toString().padStart(2, '0')
+        val y = cal.get(Calendar.YEAR)
+        val mo = (cal.get(Calendar.MONTH) + 1).toString().padStart(2, '0')
+        val d = cal.get(Calendar.DAY_OF_MONTH).toString().padStart(2, '0')
+        return SatReport(
+            id = r.id,
+            statusText = r.report,
+            call = r.callsign,
+            grid = r.gridSquare,
+            dateUtc = "$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

@@ -23,7 +23,6 @@ import com.rtbishop.look4sat.core.domain.repository.IDatabaseRepo
 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.source.Sources
 import com.rtbishop.look4sat.core.domain.utility.DataParser
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.async
@@ -40,7 +39,6 @@ class DatabaseRepo(
     private val settingsRepo: ISettingsRepo
 ) : IDatabaseRepo {
 
-    private val customSourceType = "Other"
 
     override suspend fun updateTLEFromFile(uri: String): Int = withContext(dispatcher) {
         var importedCount = 0
@@ -65,18 +63,13 @@ class DatabaseRepo(
     }
 
     override suspend fun updateFromRemote() = withContext(dispatcher) {
-        val dataSourcesSettings = settingsRepo.dataSourcesSettings.value
-        val tleUrls = buildMap {
-            putAll(Sources.satelliteDataUrls)
-            if (dataSourcesSettings.useCustomTLE) put(customSourceType, dataSourcesSettings.tleUrl)
-        }.filterValues { it.isNotBlank() }
-        val radioUrls = buildMap {
-            putAll(Sources.transceiversDataUrls)
-            if (dataSourcesSettings.useCustomTransceivers) put(customSourceType, dataSourcesSettings.transceiversUrl)
-        }.filterValues { it.isNotBlank() }
+        val settings = settingsRepo.dataSourcesSettings.value
+        fun normalizeUrl(url: String) = if (url.startsWith("http")) url else "https://$url"
+        val tleUrls = settings.satelliteUrls.filter { it.isNotBlank() }.map(::normalizeUrl)
+        val radioUrls = settings.transceiversUrls.filter { it.isNotBlank() }.map(::normalizeUrl)
         // 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) } }
+        val tleJobs = tleUrls.map { url -> async { url to remoteSource.getNetworkStream(url) } }
+        val radioJobs = radioUrls.map { url -> async { url to remoteSource.getNetworkStream(url) } }
         // parse fetched data concurrently
         val importedEntries = tleJobs.awaitAll().flatMap { (url, stream) ->
             stream?.let { parseSatelliteStream(url, unwrapIfZipped(url, it)) }.orEmpty()

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

@@ -34,9 +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,
@@ -63,19 +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 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
-            )
-        }
+        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 {
@@ -158,7 +164,7 @@ class SatelliteRepo(
                 }
             }
             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
@@ -176,7 +182,7 @@ class SatelliteRepo(
         val inRange = if (aosStartMinute <= aosEndMinute) {
             aosMinute in aosStartMinute..aosEndMinute
         } else {
-            aosMinute >= aosStartMinute || aosMinute <= aosEndMinute
+            aosMinute !in (aosEndMinute + 1)..<aosStartMinute
         }
         return if (invertAosTimeWindow) !inRange else inRange
     }

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 currentModes = MutableStateFlow(settingsRepo.selectedSatModes.value)
     private val currentQuery = MutableStateFlow("")
 
     // 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 itemsWithModes = currentModes.flatMapLatest { modes: List<String> ->
-        val catnumSet: Set<Int>? = if (modes.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 = localSource.getIdsWithModes(modes)
+            val ids = localSource.getIdsWithModes(list)
             if (ids.isEmpty()) null else ids.toHashSet()
         }
         currentItems.map { items ->
@@ -65,7 +65,7 @@ class SelectionRepo(
         }
     }
 
-    override fun getCurrentModes() = currentModes.value
+    override fun getCurrentModes() = settingsRepo.selectedSatModes.value
 
     override fun getModesList() = Sources.satelliteModes
 
@@ -78,7 +78,6 @@ class SelectionRepo(
     }
 
     override suspend fun setModes(modes: List<String>) {
-        currentModes.value = modes
         settingsRepo.setSelectedSatModes(modes)
     }
 

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

@@ -29,14 +29,17 @@ 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.Constants
 import com.rtbishop.look4sat.core.domain.predict.GeoPos
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
+import com.rtbishop.look4sat.core.domain.source.Sources
 import com.rtbishop.look4sat.core.domain.utility.positionToQth
 import com.rtbishop.look4sat.core.domain.utility.qthToPosition
 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,
@@ -67,6 +70,7 @@ class SettingsRepo(
     private val keyFrequencyAddress = "frequencyAddress"
     private val keyFrequencyPort = "frequencyPort"
     private val keyFrequencyFormat = "frequencyFormat"
+    private val keyFrequencyOffsetHz = "frequencyOffsetHz"
     private val keySelectedIds = "selectedIds"
     private val keySelectedSatModes = "selectedSatModes"
     private val keyStateOfAutoUpdate = "stateOfAutoUpdate"
@@ -86,11 +90,12 @@ class SettingsRepo(
     private val keySstvMode = "sstvMode"
     private val keyLowElevation = "lowElevation"
     private val keyHighElevation = "highElevation"
-    private val keyUseCustomTle = "useCustomTle"
-    private val keyUseCustomTransceivers = "useCustomTransceivers"
-    private val keyTleUrl = "tleUrl"
-    private val keyTransceiversUrl = "transceiversUrl"
+    private val keyRadarCompassOffset = "radarCompassOffset"
+    private val keyRadarCompassOffsetElev = "radarCompassOffsetElev"
+    private val keySatelliteUrls = "satelliteUrls"
+    private val keyTransceiversUrls = "transceiversUrls"
     private val separatorComma = ","
+    private val separatorUrl = "\n"
 
     //region # Satellites selection settings
     private val _satelliteSelection = MutableStateFlow(getSelectedIds())
@@ -274,6 +279,10 @@ class SettingsRepo(
     override val rcSettings: StateFlow<RCSettings> = _rcSettings
 
     override fun updateRCSettings(settings: RCSettings) {
+        val clampedFreqOffsetHz = settings.frequencyOffsetHz.coerceIn(
+            Constants.FREQ_OFFSET_MIN_HZ,
+            Constants.FREQ_OFFSET_MAX_HZ
+        )
         preferences.edit {
             putBoolean(keyRotatorState, settings.rotatorState)
             putString(keyRotatorAddress, settings.rotatorAddress)
@@ -283,6 +292,7 @@ class SettingsRepo(
             putString(keyFrequencyAddress, settings.frequencyAddress)
             putString(keyFrequencyPort, settings.frequencyPort)
             putString(keyFrequencyFormat, settings.frequencyFormat)
+            putLong(keyFrequencyOffsetHz, clampedFreqOffsetHz)
             putBoolean(keyBluetoothRotatorState, settings.bluetoothRotatorState)
             putString(keyBluetoothRotatorFormat, settings.bluetoothRotatorFormat)
             putString(keyBluetoothRotatorName, settings.bluetoothRotatorName)
@@ -291,7 +301,7 @@ class SettingsRepo(
             putString(keyBluetoothFrequencyFormat, settings.bluetoothFrequencyFormat)
             putString(keyBluetoothFrequencyAddress, settings.bluetoothFrequencyAddress)
         }
-        _rcSettings.value = settings
+        _rcSettings.value = settings.copy(frequencyOffsetHz = clampedFreqOffsetHz)
     }
 
     private fun getRCSettings(): RCSettings = RCSettings(
@@ -303,6 +313,8 @@ class SettingsRepo(
         frequencyAddress = preferences.getString(keyFrequencyAddress, null) ?: "127.0.0.1",
         frequencyPort = preferences.getString(keyFrequencyPort, null) ?: "4532",
         frequencyFormat = preferences.getString(keyFrequencyFormat, null) ?: $$"F $FREQ",
+        frequencyOffsetHz = preferences.getLong(keyFrequencyOffsetHz, 0L)
+            .coerceIn(Constants.FREQ_OFFSET_MIN_HZ, Constants.FREQ_OFFSET_MAX_HZ),
         bluetoothRotatorState = preferences.getBoolean(keyBluetoothRotatorState, false),
         bluetoothRotatorFormat = preferences.getString(keyBluetoothRotatorFormat, null) ?: $$"P $AZ $EL",
         bluetoothRotatorName = preferences.getString(keyBluetoothRotatorName, null) ?: "Default",
@@ -332,6 +344,8 @@ class SettingsRepo(
                 putString(keySstvMode, new.sstvMode)
                 putLong(keyLowElevation, new.lowElevation.toRawBits())
                 putLong(keyHighElevation, new.highElevation.toRawBits())
+                putFloat(keyRadarCompassOffset, new.radarCompassOffset)
+                putFloat(keyRadarCompassOffsetElev, new.radarCompassOffsetElev)
             }
             new
         }
@@ -348,7 +362,9 @@ class SettingsRepo(
         shouldSeeWhatsNew = preferences.getBoolean(keyShouldSeeWhatsNew, true),
         sstvMode = preferences.getString(keySstvMode, null) ?: "Auto",
         lowElevation = Double.fromBits(preferences.getLong(keyLowElevation, 15.0.toRawBits())),
-        highElevation = Double.fromBits(preferences.getLong(keyHighElevation, 45.0.toRawBits()))
+        highElevation = Double.fromBits(preferences.getLong(keyHighElevation, 45.0.toRawBits())),
+        radarCompassOffset = preferences.getFloat(keyRadarCompassOffset, 0f),
+        radarCompassOffsetElev = preferences.getFloat(keyRadarCompassOffsetElev, 0f)
     )
     //endregion
 
@@ -358,19 +374,19 @@ class SettingsRepo(
 
     override fun updateDataSourcesSettings(settings: DataSourcesSettings) {
         preferences.edit {
-            putBoolean(keyUseCustomTle, settings.useCustomTLE)
-            putBoolean(keyUseCustomTransceivers, settings.useCustomTransceivers)
-            putString(keyTleUrl, settings.tleUrl)
-            putString(keyTransceiversUrl, settings.transceiversUrl)
+            putString(keySatelliteUrls, settings.satelliteUrls.joinToString(separatorUrl))
+            putString(keyTransceiversUrls, settings.transceiversUrls.joinToString(separatorUrl))
         }
         _dataSourcesSettings.value = settings
     }
 
     private fun getDataSourcesSettings(): DataSourcesSettings = DataSourcesSettings(
-        useCustomTLE = preferences.getBoolean(keyUseCustomTle, false),
-        useCustomTransceivers = preferences.getBoolean(keyUseCustomTransceivers, false),
-        tleUrl = preferences.getString(keyTleUrl, "https://example.com/tle.txt") ?: "",
-        transceiversUrl = preferences.getString(keyTransceiversUrl, "https://example.com/radio.json") ?: ""
+        satelliteUrls = preferences.getString(keySatelliteUrls, null)
+            ?.split(separatorUrl)?.filter { it.isNotBlank() }
+            ?: Sources.satelliteDataUrls,
+        transceiversUrls = preferences.getString(keyTransceiversUrls, null)
+            ?.split(separatorUrl)?.filter { it.isNotBlank() }
+            ?: Sources.transceiversDataUrls
     )
     //endregion
 
@@ -411,5 +427,27 @@ class SettingsRepo(
         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 (_: 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 (_: 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/repository/DatabaseRepoTest.kt

@@ -90,10 +90,8 @@ class DatabaseRepoTest {
         }
         val settingsRepo = FakeSettingsRepo(
             dataSources = DataSourcesSettings(
-                useCustomTLE = true,
-                useCustomTransceivers = false,
-                tleUrl = customCsvUrl,
-                transceiversUrl = ""
+                satelliteUrls = listOf(customCsvUrl),
+                transceiversUrls = emptyList()
             )
         )
         val repository = DatabaseRepo(dispatcher, dataParser, localSource, remoteSource, settingsRepo)
@@ -122,6 +120,10 @@ private class FakeRemoteSource : IRemoteSource {
     override suspend fun getFileStream(uri: String): InputStream? = fileStreams[uri]?.invoke()
 
     override suspend fun getNetworkStream(url: String): InputStream? = networkStreams[url]?.invoke()
+
+    override suspend fun getAmSatCatalog(): String? = null
+
+    override suspend fun getAmSatReports(hours: Int, limit: Int): String? = null
 }
 
 private class FakeLocalSource : ILocalSource {
@@ -174,7 +176,7 @@ private class FakeSettingsRepo(dataSources: DataSourcesSettings = defaultDataSou
     override val databaseState: MutableStateFlow<DatabaseState> = MutableStateFlow(DatabaseState(0, 0, 0L))
 
     override val rcSettings: StateFlow<RCSettings> = MutableStateFlow(
-        RCSettings(false, "", "", "", false, "", "", "", false, "", "", "", false, "", "")
+        RCSettings(false, "", "", "", false, "", "", "", 0L, false, "", "", "", false, "", "")
     )
 
     override val otherSettings: StateFlow<OtherSettings> = MutableStateFlow(
@@ -213,13 +215,15 @@ private class FakeSettingsRepo(dataSources: DataSourcesSettings = defaultDataSou
     }
 
     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 = ""
+        satelliteUrls = emptyList(),
+        transceiversUrls = emptyList()
     )
 }

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

@@ -127,7 +127,7 @@ class SelectionRepoTest {
         override val databaseState: MutableStateFlow<DatabaseState> = MutableStateFlow(DatabaseState(0, 0, 0L))
 
         override val rcSettings: StateFlow<RCSettings> = MutableStateFlow(
-            RCSettings(false, "", "", "", false, "", "", "", false, "", "", "", false, "", "")
+            RCSettings(false, "", "", "", false, "", "", "", 0L, false, "", "", "", false, "", "")
         )
 
         override val otherSettings: StateFlow<OtherSettings> = MutableStateFlow(
@@ -135,7 +135,7 @@ class SelectionRepoTest {
         )
 
         override val dataSourcesSettings: StateFlow<DataSourcesSettings> = MutableStateFlow(
-            DataSourcesSettings(false, false, "", "")
+            DataSourcesSettings(emptyList(), emptyList())
         )
 
         override val radioControlSettings: StateFlow<RadioControlSettings> = MutableStateFlow(
@@ -167,6 +167,10 @@ class SelectionRepoTest {
         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/Constants.kt

@@ -0,0 +1,23 @@
+/*
+ * 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.domain.model
+
+object Constants {
+    const val FREQ_OFFSET_MIN_HZ = -50_000L
+    const val FREQ_OFFSET_MAX_HZ = 50_000L
+}

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, 5 days of state */
+data class SatStatus(
+    val name: String,        // "AO-123_[FM]"
+    val days: List<SatDay>   // 5 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

@@ -41,6 +41,7 @@ data class RCSettings(
     val frequencyAddress: String,
     val frequencyPort: String,
     val frequencyFormat: String,
+    val frequencyOffsetHz: Long = 0L,
     val bluetoothRotatorState: Boolean,
     val bluetoothRotatorFormat: String,
     val bluetoothRotatorName: String,
@@ -61,14 +62,14 @@ data class OtherSettings(
     val shouldSeeWhatsNew: Boolean,
     val sstvMode: String = "Auto",
     val lowElevation: Double = 15.0,
-    val highElevation: Double = 45.0
+    val highElevation: Double = 45.0,
+    val radarCompassOffset: Float = 0f,
+    val radarCompassOffsetElev: Float = 0f
 )
 
 data class DataSourcesSettings(
-    val useCustomTLE: Boolean,
-    val useCustomTransceivers: Boolean,
-    val tleUrl: String,
-    val transceiversUrl: String
+    val satelliteUrls: List<String>,
+    val transceiversUrls: List<String>
 )
 
 data class RadioControlSettings(

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/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

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

@@ -75,4 +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

@@ -18,18 +18,17 @@
 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",
-        "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",
-        "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 satelliteDataUrls = listOf(
+        "celestrak.org/NORAD/elements/gp.php?GROUP=active&FORMAT=csv",
+        "db.satnogs.org/api/tle/?format=3le",
+        "amsat.org/tle/current/nasabare.txt",
+        "mmccants.org/tles/classfd.zip",
+        "r4uab.ru/satonline.txt",
+        "live.ariss.org/iss.txt"
     )
-    val transceiversDataUrls = mapOf(
-        "SatNOGS" to "https://db.satnogs.org/api/transmitters/?format=json&status=active"
+    val transceiversDataUrls = listOf(
+        "db.satnogs.org/api/transmitters/?format=json&status=active",
+        "r4uab.ru/transmitters.json"
     )
     val satelliteModes = listOf(
         "4FSK", "64-QAM", "AFSK", "AFSK TUBiX10", "AHRPT", "AM", "APT", "ASK", "BPSK",

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/main/java/com/rtbishop/look4sat/core/domain/utility/Extensions.kt

@@ -41,6 +41,21 @@ fun Double.round(decimals: Int): Double {
     return kotlin.math.round(this * multiplier) / multiplier
 }
 
+fun String.aprsPasscode(): Int {
+    val callsign = this.trim().uppercase().substringBefore('-') // commonly strip SSID
+    var hash = 0x73E2
+    var i = 0
+    while (i < callsign.length) {
+        hash = hash xor (callsign[i].code shl 8)
+        i++
+        if (i < callsign.length) {
+            hash = hash xor callsign[i].code
+            i++
+        }
+    }
+    return hash and 0x7FFF
+}
+
 //fun String.getHash(type: String = "SHA-256"): String {
 //    val hexChars = "0123456789ABCDEF"
 //    val bytes = MessageDigest.getInstance(type).digest(this.toByteArray())

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

@@ -18,6 +18,7 @@
 package com.rtbishop.look4sat.core.domain
 
 import com.rtbishop.look4sat.core.domain.utility.DataParser
+import com.rtbishop.look4sat.core.domain.utility.aprsPasscode
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.test.StandardTestDispatcher
 import kotlinx.coroutines.test.runTest
@@ -239,4 +240,10 @@ class DataParserTest {
         // Matches the CSV test data epoch: 2021-11-16 → day 320
         assert(dataParser.getDayOfYear(2021, 11, 16) == 320)
     }
+
+    @Test
+    fun `check APRS passcode calculation`() {
+        assert("M7LNB".aprsPasscode() == 12443)
+        assert("N0CALL".aprsPasscode() == 13023)
+    }
 }

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

@@ -27,11 +27,15 @@ import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.RowScope
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.asPaddingValues
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.statusBars
 import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -72,6 +76,8 @@ import androidx.compose.ui.text.font.FontWeight
 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.platform.LocalDensity
+import androidx.compose.ui.platform.LocalWindowInfo
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.TextUnit
@@ -144,7 +150,7 @@ 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
@@ -213,6 +219,11 @@ 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(
@@ -228,8 +239,13 @@ fun CardButton(onClick: () -> Unit, text: String, modifier: Modifier = Modifier)
 }
 
 @Composable
-fun IconCard(action: () -> Unit, resId: Int, modifier: Modifier = Modifier, enabled: Boolean = true) {
-    ElevatedCard(modifier = Modifier.size(48.dp), enabled = enabled, onClick = action) {
+fun IconCard(
+    action: () -> Unit, resId: Int, modifier: Modifier = Modifier,
+    enabled: Boolean = true, containerColor: Color = Color.Unspecified
+) {
+    val colors = if (containerColor == Color.Unspecified) CardDefaults.elevatedCardColors()
+    else CardDefaults.elevatedCardColors(containerColor = containerColor)
+    ElevatedCard(modifier = Modifier.size(48.dp), enabled = enabled, onClick = action, colors = colors) {
         Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
             Icon(painter = painterResource(resId), contentDescription = null, modifier = modifier)
         }
@@ -285,51 +301,81 @@ fun getDefaultPass(): OrbitalPass = OrbitalPass(
 )
 
 @Composable
-fun SharedDialog(
-    title: String, onCancel: () -> Unit, onAccept: () -> Unit, content: @Composable () -> Unit
-) {
-    SharedDialog(title = title, onDismissRequest = onCancel, onCancel = onCancel, onAccept = onAccept) { _ ->
-        content()
-    }
-}
-
-@Composable
-fun SharedDialog(
+fun InfoDialog(
     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
+    onDismiss: () -> Unit,
+    onAccept: () -> Unit,
+    content: @Composable () -> Unit
 ) {
-    DialogShell(onDismissRequest = onDismissRequest) { padding ->
+    DialogShell(onDismissRequest = onDismiss) { 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,
+                fontSize = 16.sp,
                 fontWeight = FontWeight.Medium,
                 color = MaterialTheme.colorScheme.primary,
-                textAlign = titleTextAlign,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis,
+                modifier = Modifier.weight(1f)
+            )
+            CardButton(onClick = onAccept, text = stringResource(R.string.btn_accept))
+        }
+        content()
+    }
+}
+
+@Composable
+fun ConfirmDialog(
+    title: String,
+    onCancel: () -> Unit,
+    onAccept: () -> Unit,
+    content: @Composable () -> Unit
+) {
+    DialogShell(onDismissRequest = onCancel) { padding ->
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(start = padding, top = padding, end = padding)
+        ) {
+            CardButton(onClick = onCancel, text = stringResource(R.string.btn_cancel))
+            Text(
+                text = title,
+                fontSize = 16.sp,
+                fontWeight = FontWeight.Medium,
+                color = MaterialTheme.colorScheme.primary,
+                textAlign = TextAlign.Center,
                 maxLines = 1,
                 overflow = TextOverflow.Ellipsis,
                 modifier = Modifier
                     .weight(1f)
-                    .padding(horizontal = if (onCancel != null && onAccept != null) padding else 0.dp)
+                    .padding(horizontal = padding)
             )
-            if (onAccept != null) {
-                CardButton(onClick = onAccept, text = stringResource(R.string.btn_accept))
-            }
+            CardButton(onClick = onAccept, text = stringResource(R.string.btn_accept))
         }
-        content(padding)
+        content()
+    }
+}
+
+@Composable
+fun WhatsNewDialog(onDismiss: () -> Unit) {
+    InfoDialog(
+        title = stringResource(R.string.pass_whatsnew_title),
+        onDismiss = onDismiss,
+        onAccept = onDismiss
+    ) {
+        Text(
+            text = stringResource(R.string.pass_whatsnew_message),
+            fontSize = 16.sp,
+            color = MaterialTheme.colorScheme.onSurface,
+            modifier = Modifier.padding(horizontal = LocalSpacing.current.large)
+        )
+        Spacer(modifier = Modifier.height(0.dp))
     }
 }
 
@@ -341,6 +387,9 @@ private fun DialogShell(
 ) {
     val padding = LocalSpacing.current.large
     val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    val statusBarHeight = WindowInsets.statusBars.asPaddingValues().calculateTopPadding()
+    val containerHeight = with(LocalDensity.current) { LocalWindowInfo.current.containerSize.height.toDp() }
+    val maxSheetHeight = containerHeight - statusBarHeight
     val stopSheetFling = remember {
         object : NestedScrollConnection {
             override suspend fun onPostFling(consumed: Velocity, available: Velocity): Velocity {
@@ -358,7 +407,7 @@ private fun DialogShell(
         onDismissRequest = onDismissRequest,
         sheetState = sheetState,
         dragHandle = null,
-        shape = RoundedCornerShape(topStart = 24.dp, topEnd = 24.dp),
+        shape = RoundedCornerShape(topStart = 12.dp, topEnd = 12.dp),
         scrimColor = Color.Black.copy(alpha = 0.64f)
     ) {
         Column(
@@ -366,6 +415,7 @@ private fun DialogShell(
             verticalArrangement = Arrangement.spacedBy(padding),
             modifier = Modifier
                 .fillMaxWidth()
+                .heightIn(max = maxSheetHeight)
                 .nestedScroll(stopSheetFling)
         ) {
             content(padding)

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/java/com/rtbishop/look4sat/core/presentation/Navigation.kt

@@ -24,13 +24,13 @@ import kotlinx.serialization.Serializable
 sealed class Screen(val iconResId: Int, val titleResId: Int) : NavKey {
 
     @Serializable
-    data object Satellites : Screen(R.drawable.ic_satellites, R.string.nav_sat)
+    data object Satellites : Screen(R.drawable.ic_sputnik, R.string.nav_sat)
 
     @Serializable
     data object Passes : Screen(R.drawable.ic_passes, R.string.nav_pass)
 
     @Serializable
-    data object Radar : Screen(R.drawable.ic_radar, R.string.nav_radar)
+    data object Status : Screen(R.drawable.ic_satellite, R.string.nav_status)
 
     @Serializable
     data object Map : Screen(R.drawable.ic_map, R.string.nav_map)

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

@@ -0,0 +1,9 @@
+<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="M440,520L200,520L200,440L440,440L440,200L520,200L520,440L760,440L760,520L520,520L520,760L440,760L440,520Z" />
+</vector>

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_radar.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="M480,880Q397,880 324,848.5Q251,817 197,763Q143,709 111.5,636Q80,563 80,480Q80,397 111.5,324Q143,251 197,197Q251,143 324,111.5Q397,80 480,80L520,80L520,411Q538,422 549,439.5Q560,457 560,480Q560,513 536.5,536.5Q513,560 480,560Q447,560 423.5,536.5Q400,513 400,480Q400,457 411,439Q422,421 440,411L440,325Q388,339 354,381.5Q320,424 320,480Q320,546 367,593Q414,640 480,640Q546,640 593,593Q640,546 640,480Q640,444 625.5,413.5Q611,383 586,360L643,303Q678,336 699,381.5Q720,427 720,480Q720,580 650,650Q580,720 480,720Q380,720 310,650Q240,580 240,480Q240,390 297,323.5Q354,257 440,243L440,162Q321,177 240.5,267Q160,357 160,480Q160,614 253,707Q346,800 480,800Q614,800 707,707Q800,614 800,480Q800,411 773,351Q746,291 699,247L756,190Q813,245 846.5,319.5Q880,394 880,480Q880,563 848.5,636Q817,709 763,763Q709,817 636,848.5Q563,880 480,880Z" />
-</vector>

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

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<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="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>

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

@@ -0,0 +1,31 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="128"
+    android:viewportHeight="128">
+  <path
+      android:pathData="m105.14,114.12a2.86,2.86 90,0 0,1.7 -0.85l19.33,-19.33a2.86,2.86 90,0 0,-0 -4.03l-26.58,-26.62a2.86,2.86 90,0 0,-1.84 -0.81l-7.92,-0.63 5.77,-5.77a2.86,2.86 90,0 0,-0 -4.03l-19.6,-19.64a2.86,2.86 90,0 0,-4.07 -0l-5.77,5.77 -0.63,-7.92a2.86,2.86 90,0 0,-0.81 -1.83l-26.63,-26.58a2.86,2.86 90,0 0,-4.07 -0l-19.29,19.29a2.86,2.86 90,0 0,-0 4.07l26.58,26.62a2.86,2.86 90,0 0,1.83 0.81l7.92,0.63 -5.77,5.77a2.86,2.86 90,0 0,-0 4.07l19.6,19.6a2.86,2.86 90,0 0,4.07 -0l5.77,-5.77 0.63,7.92a2.86,2.86 90,0 0,0.81 1.83l26.63,26.58a2.86,2.86 90,0 0,2.06 0.85,2.86 2.86,90 0,0 0.27,-0zM104.82,107.23 L80.97,83.38 80.16,72.69 85.58,67.27 96.28,68.12 120.13,91.93zM55.33,47.85 L44.63,47 20.78,23.19 36.08,7.89 59.89,31.74 60.74,42.44z"
+      android:fillColor="#ffffff"
+      android:strokeColor="#00000000"
+      android:fillType="evenOdd"/>
+  <path
+      android:pathData="m62.65,115.81a2.86,2.86 90,1 0,-0 -5.73c-11.46,-0 -22.88,-4.35 -31.63,-13.11 -8.74,-8.74 -13.1,-20.17 -13.1,-31.61a2.86,2.86 90,1 0,-5.73 -0c-0,12.9 4.94,25.83 14.77,35.66 9.85,9.85 22.77,14.78 35.68,14.78z"
+      android:fillColor="#ffffff"
+      android:strokeColor="#00000000"
+      android:fillType="evenOdd"/>
+  <path
+      android:pathData="m62.65,127a2.86,2.86 90,1 0,-0 -5.73c-14.32,-0 -28.61,-5.44 -39.55,-16.37 -10.93,-10.93 -16.38,-25.23 -16.38,-39.54a2.86,2.86 90,1 0,-5.73 -0c-0,15.76 6.03,31.56 18.06,43.59 12.03,12.03 27.82,18.05 43.6,18.05z"
+      android:fillColor="#ffffff"
+      android:strokeColor="#00000000"
+      android:fillType="evenOdd"/>
+  <path
+      android:pathData="m62.65,104.7a2.86,2.86 90,1 0,-0 -5.73c-8.62,-0 -17.2,-3.26 -23.78,-9.84 -6.58,-6.58 -9.86,-15.17 -9.86,-23.77a2.86,2.86 90,1 0,-5.73 -0c-0,10.06 3.86,20.15 11.53,27.82 7.67,7.67 17.76,11.52 27.83,11.52z"
+      android:fillColor="#ffffff"
+      android:strokeColor="#00000000"
+      android:fillType="evenOdd"/>
+  <path
+      android:pathData="m62.65,93.48a2.86,2.86 90,1 0,-0 -5.73c-5.74,-0 -11.45,-2.17 -15.84,-6.56 -4.38,-4.38 -6.56,-10.1 -6.56,-15.83a2.86,2.86 90,1 0,-5.73 -0c-0,7.19 2.76,14.41 8.24,19.88 5.48,5.48 12.69,8.23 19.89,8.23z"
+      android:fillColor="#ffffff"
+      android:strokeColor="#00000000"
+      android:fillType="evenOdd"/>
+</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

@@ -155,11 +155,11 @@
     <string name="prefs_net_perm_error">Revisa los permisos de red</string>
 
     <string name="prefs_other_title">Otros</string>
-    <string name="prefs_other_switch_utc">Mostrar hora UTC</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 de radar</string>
-    <string name="prefs_other_switch_sensors">Sensores para radar</string>
-    <string name="prefs_other_switch_night_mode">Filtro nocturno rojo</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>

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

@@ -158,8 +158,8 @@
     <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 для радара</string>
-    <string name="prefs_other_switch_night_mode">Красный ночной фильтр</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>

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

@@ -155,11 +155,11 @@
     <string name="prefs_net_perm_error">Network අවසර පරික්‍ෂා කරන්න</string>
 
     <string name="prefs_other_title">වෙනත්</string>
-    <string name="prefs_other_switch_utc">UTC වේලාව පෙන්වන්න</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 සජීවිකරණය</string>
-    <string name="prefs_other_switch_sensors">Radar සඳහා සංවේදක භාවිතා කරන්න</string>
-    <string name="prefs_other_switch_night_mode">රතු රාත්‍රී පෙරහන</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>

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

@@ -187,11 +187,11 @@
     <string name="prefs_net_perm_error">Ağ izninizi kontrol edin</string>
 
     <string name="prefs_other_title">Diğer</string>
-    <string name="prefs_other_switch_utc">UTC saatini göster</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 tarama animasyonu</string>
-    <string name="prefs_other_switch_sensors">Radar için sensör kullan</string>
-    <string name="prefs_other_switch_night_mode">Kırmızı gece filtresi</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>

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

@@ -158,8 +158,8 @@
     <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 для радара</string>
-    <string name="prefs_other_switch_night_mode">Червоний нічний фільтр</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>

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

@@ -60,6 +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>
@@ -84,7 +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>
@@ -92,11 +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</string>
-    <string name="prefs_station_lat_text">站位纬度</string>
-    <string name="prefs_station_lon_text">站位经度</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>
@@ -152,6 +155,8 @@
     <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>

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

@@ -12,6 +12,7 @@
     <string name="nav_radar">Radar</string>
     <string name="nav_map">Map</string>
     <string name="nav_prefs">Settings</string>
+    <string name="nav_status" translatable="false">AMSAT</string>
 
     <!-- Satellites screen -->
     <string name="sat_type_hint">Modes: %s</string>
@@ -55,10 +56,30 @@
         \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</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 AMSAT status tracking page by MCKero6423 (#234)
+        \n* Tweaked Radar track on reposition by atsunatsu (#235)
+        \n* Tweaked linear transponder calc by atsunatsu (#236)
+        \n* Added saving per-sat doppler offset by atsunatsu (#237)
+        \n* Added custom freq offset setting to network reporting
+        \n* Added ability to customize data sources via import
+        \n* Fixed star chart in README by PingouinFerreux (#240)
     </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>
@@ -84,6 +105,9 @@
     <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>
@@ -145,10 +169,7 @@
     <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 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_sources_title">Data sources</string>
 
     <string name="prefs_data_output_title">Data output</string>
     <string name="prefs_net_output">Network</string>
@@ -172,6 +193,8 @@
     <string name="prefs_net_frequency_switch">Enable frequency output</string>
     <string name="prefs_net_frequency_address_hint">IP:Port</string>
     <string name="prefs_net_frequency_format_hint">Format</string>
+    <string name="prefs_net_frequency_offset_hint" translatable="false">Frequency offset (Hz)</string>
+    <string name="prefs_net_frequency_offset_help" translatable="false">Range: -50000 to 50000 Hz. Positive values increase reported frequency; negative values decrease it.</string>
 
     <string name="prefs_bt_title">Bluetooth output</string>
     <string name="prefs_bt_rotator_switch">Enable rotation output</string>
@@ -184,11 +207,13 @@
     <string name="prefs_net_perm_error">Check your network permission</string>
 
     <string name="prefs_other_title">Other</string>
-    <string name="prefs_other_switch_utc">Show UTC time</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 animation</string>
-    <string name="prefs_other_switch_sensors">Use sensors for radar</string>
-    <string name="prefs_other_switch_night_mode">Red night filter</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>

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

@@ -1,2 +1,7 @@
-* Added required tweaks to support Android 17 (API 37)
-* Added ACCESS_LOCAL_NETWORK permission check to support network data output
+* Added AMSAT status tracking page by MCKero6423 (#234)
+* Tweaked Radar track on reposition by atsunatsu (#235)
+* Tweaked linear transponder calc by atsunatsu (#236)
+* Added saving per-sat doppler offset by atsunatsu (#237)
+* Added custom freq offset setting to network reporting
+* Added ability to customize data sources via import
+* Fixed star chart in README by PingouinFerreux (#240)

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

@@ -58,7 +58,7 @@ import androidx.compose.ui.unit.sp
 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.ConfirmDialog
 import com.rtbishop.look4sat.core.presentation.ElevationHighColor
 import com.rtbishop.look4sat.core.presentation.ElevationLowColor
 import com.rtbishop.look4sat.core.presentation.elevationColor
@@ -140,7 +140,7 @@ internal fun PassesFilterDialog(
         )
         cancel()
     }
-    SharedDialog(title = stringResource(R.string.pass_filter_title), onCancel = cancel, onAccept = onAccept) {
+    ConfirmDialog(title = stringResource(R.string.pass_filter_title), onCancel = cancel, onAccept = onAccept) {
         SliderRow(
             title = stringResource(R.string.pass_filter_elev),
             value = elevationValueNew.doubleValue,
@@ -365,7 +365,7 @@ internal fun RadiosDialog(modes: List<String>, cancel: () -> Unit, accept: (List
         selected.value = if (mode in selected.value) selected.value - mode else selected.value + mode
     }
     val onAccept = { accept(selected.value.toList()).also { cancel() } }
-    SharedDialog(title = stringResource(R.string.pass_modes_title), onCancel = cancel, onAccept = onAccept) {
+    ConfirmDialog(title = stringResource(R.string.pass_modes_title), onCancel = cancel, onAccept = onAccept) {
         LazyVerticalGrid(
             columns = GridCells.Adaptive(240.dp),
             modifier = Modifier

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

@@ -30,7 +30,6 @@ 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
@@ -72,10 +71,10 @@ 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
+import com.rtbishop.look4sat.core.presentation.WhatsNewDialog
 import com.rtbishop.look4sat.core.presentation.elevationColor
 import com.rtbishop.look4sat.core.presentation.infiniteMarquee
 import com.rtbishop.look4sat.core.presentation.isVerticalLayout
@@ -136,27 +135,14 @@ private fun PassesScreen(
     }
     if (uiState.shouldSeeWhatsNew) {
         val dismiss = { onAction(PassesAction.DismissWhatsNew) }
-        SharedDialog(
-            title = stringResource(R.string.pass_whatsnew_title),
-            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))
-        }
+        WhatsNewDialog(onDismiss = dismiss)
     }
     ScreenColumn(
         topBar = { isVerticalLayout ->
             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)
@@ -165,7 +151,7 @@ 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)
                 }
             )
         }
@@ -292,6 +278,11 @@ 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() {
@@ -324,7 +315,7 @@ 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/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,
@@ -91,32 +95,37 @@ class PassesViewModel(
                 _uiState.update { it.copy(modes = modes) }
             }
         }
-        // Main tick loop: reacts to new passes, then ticks every second
+        // 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 {
-            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
-                        )
+            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)
                     }
-                    delay(1000)
                 }
-            }
         }
     }
 
@@ -145,12 +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 }) {
@@ -173,7 +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

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

@@ -58,11 +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 }
@@ -96,4 +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

@@ -65,11 +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
@@ -88,33 +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) }
+                    }
+                }
             }
         }
     }
@@ -213,7 +250,7 @@ class RadarViewModel(
     }
 
     override fun onCleared() {
-        sensorsRepo.disableSensor()
+        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) }
+            }
         }
     }
 
@@ -399,7 +455,7 @@ class RadarViewModel(
         //   - 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 = 0.40f  // Changed from 0.25 to safer default
+        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
@@ -422,7 +478,7 @@ class RadarViewModel(
         //   - 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.Look4SatLimited
+        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
@@ -434,7 +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

@@ -53,10 +53,10 @@ 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 com.rtbishop.look4sat.core.presentation.ConfirmDialog
 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
 
@@ -96,14 +96,14 @@ internal fun SstvPage(
     if (showModeDialog.value) {
         val allModes = remember(sstv.supportedModes) { listOf("Auto") + sstv.supportedModes }
         val dismiss = { showModeDialog.value = false }
-        SharedDialog(
+        ConfirmDialog(
             title = "SSTV Mode",
-            onDismissRequest = dismiss,
-            onAccept = dismiss
-        ) { _ ->
+            onAccept = dismiss,
+            onCancel = dismiss
+        ) {
             LazyColumn(
                 modifier = Modifier
-                    .fillMaxHeight(0.7f)
+                    .fillMaxHeight(0.69f)
                     .background(MaterialTheme.colorScheme.background),
                 verticalArrangement = Arrangement.spacedBy(1.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,
@@ -437,6 +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 {
@@ -452,5 +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

@@ -39,9 +39,9 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import com.rtbishop.look4sat.core.presentation.ConfirmDialog
 import com.rtbishop.look4sat.core.presentation.MainTheme
 import com.rtbishop.look4sat.core.presentation.R
-import com.rtbishop.look4sat.core.presentation.SharedDialog
 
 @Preview(showBackground = true)
 @Composable
@@ -59,7 +59,7 @@ internal fun MultiModesDialog(
         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) {
+    ConfirmDialog(title = stringResource(R.string.sat_type_title), onCancel = cancel, onAccept = onAccept) {
         LazyVerticalGrid(
             columns = GridCells.Adaptive(240.dp),
             modifier = Modifier

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

@@ -62,10 +62,11 @@ 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.LocalSpacing
 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
@@ -96,17 +97,16 @@ private fun SatellitesScreen(
     }
     if (uiState.shouldSeeWarning) {
         val dismiss = { onAction(SatellitesAction.DismissWarning) }
-        SharedDialog(
+        InfoDialog(
             title = stringResource(R.string.sat_warning_title),
-            onDismissRequest = dismiss,
-            onAccept = dismiss,
-            titleFontSize = 18
-        ) { padding ->
+            onDismiss = dismiss,
+            onAccept = dismiss
+        ) {
             Text(
                 text = stringResource(R.string.sat_warning_message),
                 fontSize = 16.sp,
                 color = MaterialTheme.colorScheme.onSurface,
-                modifier = Modifier.padding(horizontal = padding)
+                modifier = Modifier.padding(horizontal = LocalSpacing.current.large)
             )
             Spacer(modifier = Modifier.height(0.dp))
         }

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

@@ -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) {

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

@@ -17,26 +17,40 @@
  */
 package com.rtbishop.look4sat.feature.settings
 
+import androidx.compose.animation.core.spring
 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.PaddingValues
 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.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListScope
+import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.material3.FilterChip
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableLongStateOf
 import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.toMutableStateList
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.rotate
+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
@@ -45,11 +59,13 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.rtbishop.look4sat.core.domain.model.RCSettings
 import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
+import com.rtbishop.look4sat.core.domain.model.Constants
 import com.rtbishop.look4sat.core.presentation.CardButton
+import com.rtbishop.look4sat.core.presentation.IconCard
 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.ConfirmDialog
 
 @Preview(showBackground = true)
 @Composable
@@ -63,7 +79,7 @@ fun PositionDialog(lat: Double, lon: Double, dismiss: () -> Unit, save: (Double,
     val lonValue = rememberSaveable { mutableStateOf(lon.toString()) }
     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) {
+    ConfirmDialog(title = titleText, onCancel = dismiss, onAccept = onAccept) {
         Row(
             horizontalArrangement = Arrangement.spacedBy(6.dp),
             modifier = Modifier
@@ -107,7 +123,7 @@ 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(
+    ConfirmDialog(
         title = stringResource(R.string.prefs_locator_title),
         onCancel = dismiss,
         onAccept = onAccept
@@ -129,133 +145,144 @@ fun LocatorDialog(qthLocator: String, dismiss: () -> Unit, save: (String) -> Uni
 private fun TransceiversDialogPreview() {
     MainTheme {
         DataSourcesDialog(
-            useCustomTle = true,
-            useCustomTransceivers = true,
-            tleUrl = "https://example.com/tle.txt",
-            transceiversUrl = "https://example.com/tx.json",
-            requestCustomSourcesPermission = { onGranted, _ -> onGranted() },
+            satelliteUrls = listOf(
+                "celestrak.org/NORAD/elements/gp.php?GROUP=active&FORMAT=csv",
+                "amsat.org/tle/current/nasabare.txt"
+            ),
+            transceiversUrls = listOf(
+                "db.satnogs.org/api/transmitters/?format=json&status=active"
+            ),
             onImportTle = {},
             onImportTransceivers = {},
             onDismiss = {},
-            onSave = { _, _, _, _ -> }
+            onSave = { _, _ -> }
         )
     }
 }
 
 @Composable
 fun DataSourcesDialog(
-    useCustomTle: Boolean,
-    useCustomTransceivers: Boolean,
-    tleUrl: String,
-    transceiversUrl: String,
-    requestCustomSourcesPermission: (onGranted: () -> Unit, onDenied: () -> Unit) -> Unit,
+    satelliteUrls: List<String>,
+    transceiversUrls: List<String>,
     onImportTle: () -> Unit,
     onImportTransceivers: () -> Unit,
     onDismiss: () -> Unit,
-    onSave: (Boolean, Boolean, String, String) -> Unit
+    onSave: (List<String>, List<String>) -> Unit
 ) {
     val padding = LocalSpacing.current.large
-    val isEnabledCustomTle = rememberSaveable { mutableStateOf(useCustomTle) }
-    val isEnabledCustomTransceivers = rememberSaveable { mutableStateOf(useCustomTransceivers) }
-    val urlTle = rememberSaveable { mutableStateOf(tleUrl) }
-    val urlTransceivers = rememberSaveable { mutableStateOf(transceiversUrl) }
-    val onAccept = {
-        onSave(
-            isEnabledCustomTle.value,
-            isEnabledCustomTransceivers.value,
-            urlTle.value,
-            urlTransceivers.value
-        )
-        onDismiss()
+    // Use stable Long IDs to avoid key collisions (e.g. multiple empty "" entries).
+    val nextId = remember { mutableLongStateOf((satelliteUrls.size + transceiversUrls.size).toLong()) }
+    val satUrls = remember {
+        satelliteUrls.mapIndexed { i, url -> i.toLong() to url }.toMutableStateList()
     }
-    val onCancel = { onDismiss() }
-    SharedDialog(
+    val txUrls = remember {
+        transceiversUrls.mapIndexed { i, url -> (satelliteUrls.size + i).toLong() to url }.toMutableStateList()
+    }
+    val onAccept = { onSave(satUrls.map { it.second }, txUrls.map { it.second }); onDismiss() }
+    ConfirmDialog(
         title = stringResource(id = R.string.prefs_data_sources_title),
-        onCancel = onCancel,
+        onCancel = onDismiss,
         onAccept = onAccept,
     ) {
-        Column(modifier = Modifier.padding(horizontal = padding)) {
-            Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
-                CardButton(
-                    onClick = {
-                        onImportTle()
-                        onDismiss()
-                    },
-                    text = "TLE/3LE (.txt)\nOMM (.csv)",
-                    modifier = Modifier.weight(1f)
-                )
-                CardButton(
-                    onClick = {
-                        onImportTransceivers()
-                        onDismiss()
-                    },
-                    text = "Transceivers\nSatNOGS (.json)",
-                    modifier = Modifier.weight(1f)
-                )
+        LazyColumn(
+            modifier = Modifier
+                .fillMaxHeight(0.84f)
+                .padding(horizontal = padding),
+            verticalArrangement = Arrangement.spacedBy(4.dp),
+            contentPadding = PaddingValues(vertical = 6.dp)
+        ) {
+            item {
+                Row(
+                    horizontalArrangement = Arrangement.spacedBy(6.dp),
+                    modifier = Modifier.fillMaxWidth()
+                ) {
+                    CardButton(
+                        onClick = { onImportTle(); onDismiss() },
+                        text = "TLE/3LE (.txt)\nOMM (.csv)",
+                        modifier = Modifier.weight(1f)
+                    )
+                    CardButton(
+                        onClick = { onImportTransceivers(); onDismiss() },
+                        text = "Transceivers\nSatNOGS (.json)",
+                        modifier = Modifier.weight(1f)
+                    )
+                }
             }
-            Spacer(modifier = Modifier.height(6.dp))
-            Row(
-                horizontalArrangement = Arrangement.SpaceBetween,
-                verticalAlignment = Alignment.CenterVertically,
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                Text(text = stringResource(id = R.string.prefs_data_sources_tle_switch))
-                Switch(
-                    checked = isEnabledCustomTle.value,
-                    onCheckedChange = { enabled ->
-                        if (!enabled) {
-                            isEnabledCustomTle.value = false
-                        } else {
-                            requestCustomSourcesPermission(
-                                { isEnabledCustomTle.value = true },
-                                { isEnabledCustomTle.value = false }
-                            )
-                        }
-                    }
-                )
-            }
-            OutlinedTextField(
-                value = urlTle.value,
-                onValueChange = { urlTle.value = it },
-                label = { Text(text = stringResource(id = R.string.prefs_data_sources_url_title)) },
-                singleLine = true,
-                modifier = Modifier.fillMaxWidth(),
-                enabled = isEnabledCustomTle.value,
+            sourceSection(
+                sectionKey = "sat",
+                label = "Satellites data",
+                urls = satUrls,
+                onAdd = { satUrls.add(nextId.longValue++ to "") },
+                onMoveUp = { i -> if (i > 0) satUrls.add(i - 1, satUrls.removeAt(i)) },
+                onRemove = { i -> satUrls.removeAt(i) },
+                onUrlChange = { i, v -> satUrls[i] = satUrls[i].first to v }
             )
-            Spacer(modifier = Modifier.height(6.dp))
-            Row(
-                horizontalArrangement = Arrangement.SpaceBetween,
-                verticalAlignment = Alignment.CenterVertically,
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                Text(text = stringResource(id = R.string.prefs_data_sources_transceivers_switch))
-                Switch(
-                    checked = isEnabledCustomTransceivers.value,
-                    onCheckedChange = { enabled ->
-                        if (!enabled) {
-                            isEnabledCustomTransceivers.value = false
-                        } else {
-                            requestCustomSourcesPermission(
-                                { isEnabledCustomTransceivers.value = true },
-                                { isEnabledCustomTransceivers.value = false }
-                            )
-                        }
-                    }
-                )
-            }
-            OutlinedTextField(
-                value = urlTransceivers.value,
-                onValueChange = { urlTransceivers.value = it },
-                label = { Text(text = stringResource(id = R.string.prefs_data_sources_url_title)) },
-                singleLine = true,
-                modifier = Modifier.fillMaxWidth(),
-                enabled = isEnabledCustomTransceivers.value,
+            sourceSection(
+                sectionKey = "tx",
+                label = "Transceivers data",
+                urls = txUrls,
+                onAdd = { txUrls.add(nextId.longValue++ to "") },
+                onMoveUp = { i -> if (i > 0) txUrls.add(i - 1, txUrls.removeAt(i)) },
+                onRemove = { i -> txUrls.removeAt(i) },
+                onUrlChange = { i, v -> txUrls[i] = txUrls[i].first to v }
             )
-            Spacer(modifier = Modifier.height(12.dp))
         }
     }
 }
 
+private fun LazyListScope.sourceSection(
+    sectionKey: String,
+    label: String,
+    urls: List<Pair<Long, String>>,
+    onAdd: () -> Unit,
+    onMoveUp: (Int) -> Unit,
+    onRemove: (Int) -> Unit,
+    onUrlChange: (Int, String) -> Unit
+) {
+    item {
+        Spacer(modifier = Modifier.height(6.dp))
+        Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.fillMaxWidth()) {
+            Text(
+                text = label,
+                fontWeight = FontWeight.Medium,
+                color = MaterialTheme.colorScheme.primary,
+                modifier = Modifier.weight(1f)
+            )
+            IconCard(action = onAdd, resId = R.drawable.ic_add, containerColor = MaterialTheme.colorScheme.surfaceVariant)
+        }
+    }
+    itemsIndexed(urls, key = { _, entry -> "$sectionKey-${entry.first}" }) { index, (_, url) ->
+        val enabledTint = MaterialTheme.colorScheme.onSurfaceVariant
+        OutlinedTextField(
+            value = url,
+            onValueChange = { onUrlChange(index, it) },
+            label = { Text("Source URL") },
+            leadingIcon = {
+                IconButton(onClick = { onMoveUp(index) }) {
+                    Icon(
+                        painter = painterResource(R.drawable.ic_arrow),
+                        contentDescription = null,
+                        tint = if (index > 0) enabledTint else enabledTint.copy(alpha = 0.32f),
+                        modifier = Modifier.rotate(270f)
+                    )
+                }
+            },
+            trailingIcon = {
+                IconButton(onClick = { onRemove(index) }) {
+                    Icon(
+                        painter = painterResource(R.drawable.ic_delete),
+                        contentDescription = null
+                    )
+                }
+            },
+            singleLine = true,
+            modifier = Modifier
+                .fillMaxWidth()
+                .animateItem(fadeInSpec = spring(), fadeOutSpec = spring())
+        )
+    }
+}
+
 @Preview(showBackground = true)
 @Composable
 fun PreviewNetworkOutputDialog() {
@@ -270,6 +297,7 @@ fun PreviewNetworkOutputDialog() {
                 frequencyAddress = "127.0.0.1",
                 frequencyPort = "4532",
                 frequencyFormat = $$"F $FREQ",
+                frequencyOffsetHz = 0L,
                 bluetoothRotatorState = false,
                 bluetoothRotatorFormat = $$"P $AZ $EL",
                 bluetoothRotatorName = "Default",
@@ -279,7 +307,7 @@ fun PreviewNetworkOutputDialog() {
                 bluetoothFrequencyFormat = $$"F $FREQ"
             ),
             onDismiss = {},
-            onSave = { _, _, _, _, _, _, _, _ -> }
+            onSave = { _, _, _, _, _, _, _, _, _ -> }
         )
     }
 }
@@ -290,7 +318,7 @@ fun NetworkOutputDialog(
     onDismiss: () -> Unit,
     onSave: (
         Boolean, String, String, String,
-        Boolean, String, String, String
+        Boolean, String, String, String, Long
     ) -> Unit
 ) {
     val padding = LocalSpacing.current.large
@@ -304,16 +332,19 @@ fun NetworkOutputDialog(
         mutableStateOf("${initialSettings.frequencyAddress}:${initialSettings.frequencyPort}")
     }
     val frequencyFormat = rememberSaveable { mutableStateOf(initialSettings.frequencyFormat) }
+    val frequencyOffsetHz = rememberSaveable { mutableStateOf(initialSettings.frequencyOffsetHz.toString()) }
     val onAccept = {
         val (rotIp, rotPort) = splitAddress(rotatorAddress.value)
         val (freqIp, freqPort) = splitAddress(frequencyAddress.value)
+        val offsetHz = (frequencyOffsetHz.value.trim().toLongOrNull() ?: 0L)
+            .coerceIn(Constants.FREQ_OFFSET_MIN_HZ, Constants.FREQ_OFFSET_MAX_HZ)
         onSave(
             rotatorState.value, rotIp, rotPort, rotatorFormat.value,
-            frequencyState.value, freqIp, freqPort, frequencyFormat.value
+            frequencyState.value, freqIp, freqPort, frequencyFormat.value, offsetHz
         )
         onDismiss()
     }
-    SharedDialog(
+    ConfirmDialog(
         title = stringResource(R.string.prefs_net_title),
         onCancel = onDismiss,
         onAccept = onAccept
@@ -342,6 +373,27 @@ fun NetworkOutputDialog(
                 onFormatChange = { frequencyFormat.value = it },
                 formatLabel = stringResource(R.string.prefs_net_frequency_format_hint)
             )
+            Spacer(modifier = Modifier.height(6.dp))
+            OutlinedTextField(
+                value = frequencyOffsetHz.value,
+                onValueChange = { frequencyOffsetHz.value = it },
+                singleLine = true,
+                label = { Text(stringResource(R.string.prefs_net_frequency_offset_hint)) },
+                supportingText = { Text(stringResource(R.string.prefs_net_frequency_offset_help)) },
+                trailingIcon = {
+                    IconButton(
+                        onClick = { frequencyOffsetHz.value = "0" },
+                        enabled = frequencyState.value && frequencyOffsetHz.value != "0"
+                    ) {
+                        Icon(
+                            painter = painterResource(R.drawable.ic_close),
+                            contentDescription = null
+                        )
+                    }
+                },
+                modifier = Modifier.fillMaxWidth(),
+                enabled = frequencyState.value
+            )
             Spacer(modifier = Modifier.height(12.dp))
         }
     }
@@ -370,6 +422,7 @@ fun PreviewBluetoothOutputDialog() {
                 frequencyAddress = "127.0.0.1",
                 frequencyPort = "4532",
                 frequencyFormat = $$"F $FREQ",
+                frequencyOffsetHz = 0L,
                 bluetoothRotatorState = false,
                 bluetoothRotatorFormat = $$"P $AZ $EL",
                 bluetoothRotatorName = "Default",
@@ -411,7 +464,7 @@ fun BluetoothOutputDialog(
         )
         onDismiss()
     }
-    SharedDialog(
+    ConfirmDialog(
         title = stringResource(R.string.prefs_bt_title),
         onCancel = onDismiss,
         onAccept = onAccept
@@ -538,7 +591,7 @@ fun RadioControlDialog(
         onDismiss()
     }
 
-    SharedDialog(
+    ConfirmDialog(
         title = stringResource(R.string.rc_settings_title),
         onCancel = onDismiss,
         onAccept = onAccept

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

@@ -25,10 +25,12 @@ 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
@@ -38,6 +40,7 @@ import androidx.compose.material3.ElevatedCard
 import androidx.compose.material3.Icon
 import androidx.compose.material3.LinearProgressIndicator
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Slider
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -61,6 +64,7 @@ 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.DataSourcesSettings
 import com.rtbishop.look4sat.core.domain.model.OtherSettings
 import com.rtbishop.look4sat.core.domain.predict.GeoPos
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
@@ -71,6 +75,7 @@ import com.rtbishop.look4sat.core.presentation.PrimaryIconCard
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.ScreenColumn
 import com.rtbishop.look4sat.core.presentation.TopBar
+import com.rtbishop.look4sat.core.presentation.WhatsNewDialog
 import com.rtbishop.look4sat.core.presentation.infiniteMarquee
 import com.rtbishop.look4sat.core.presentation.isVerticalLayout
 import java.text.SimpleDateFormat
@@ -89,22 +94,10 @@ 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 },
-        onCustomSourcesPermissionGranted = {
-            pendingCustomSourcesGrant.value?.invoke()
-            pendingCustomSourcesGrant.value = null
-            pendingCustomSourcesDeny.value = null
-        },
-        onCustomSourcesPermissionDenied = {
-            pendingCustomSourcesDeny.value?.invoke()
-            pendingCustomSourcesGrant.value = null
-            pendingCustomSourcesDeny.value = null
-        }
+        onNetworkGranted = { dialogs.network = true }
     )
 
     // Dialogs
@@ -125,30 +118,15 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
     }
     if (dialogs.dataSources) {
         DataSourcesDialog(
-            useCustomTle = uiState.dataSourcesSettings.useCustomTLE,
-            useCustomTransceivers = uiState.dataSourcesSettings.useCustomTransceivers,
-            tleUrl = uiState.dataSourcesSettings.tleUrl,
-            transceiversUrl = uiState.dataSourcesSettings.transceiversUrl,
-            requestCustomSourcesPermission = { onGranted, onDenied ->
-                pendingCustomSourcesGrant.value = onGranted
-                pendingCustomSourcesDeny.value = onDenied
-                permissions.launchCustomSourcesPermission()
-            },
+            satelliteUrls = uiState.dataSourcesSettings.satelliteUrls,
+            transceiversUrls = uiState.dataSourcesSettings.transceiversUrls,
             onImportTle = { permissions.launchTleImport(); dialogs.dataSources = false },
             onImportTransceivers = { permissions.launchTransceiverImport(); dialogs.dataSources = false },
             onDismiss = { dialogs.dataSources = false },
-            onSave = { useCustomTle, useCustomTransceivers, tleUrl, transceiversUrl ->
-                val current = uiState.dataSourcesSettings
-                val newSettings = current.copy(
-                    useCustomTLE = if (!useCustomTle || tleUrl.isNotBlank()) useCustomTle else current.useCustomTLE,
-                    tleUrl = if (!useCustomTle || tleUrl.isNotBlank()) tleUrl else current.tleUrl,
-                    useCustomTransceivers = if (!useCustomTransceivers || transceiversUrl.isNotBlank()) useCustomTransceivers else current.useCustomTransceivers,
-                    transceiversUrl = if (!useCustomTransceivers || transceiversUrl.isNotBlank()) transceiversUrl else current.transceiversUrl
-                )
-                if (newSettings != current) onAction(SettingsAction.UpdateDataSources(newSettings))
-                if (newSettings.useCustomTLE || newSettings.useCustomTransceivers) {
-                    onAction(SettingsAction.UpdateFromWeb)
-                }
+            onSave = { satUrls, txUrls ->
+                val newSettings = DataSourcesSettings(satelliteUrls = satUrls, transceiversUrls = txUrls)
+                if (newSettings != uiState.dataSourcesSettings) onAction(SettingsAction.UpdateDataSources(newSettings))
+                onAction(SettingsAction.UpdateFromWeb)
             }
         )
     }
@@ -156,14 +134,15 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
         NetworkOutputDialog(
             initialSettings = uiState.rcSettings,
             onDismiss = { dialogs.network = false },
-            onSave = { rotState, rotAddr, rotPort, rotFmt, freqState, freqAddr, freqPort, freqFmt ->
+            onSave = { rotState, rotAddr, rotPort, rotFmt, freqState, freqAddr, freqPort, freqFmt, freqOffsetHz ->
                 onAction(
                     SettingsAction.UpdateRC(
                         uiState.rcSettings.copy(
                             rotatorState = rotState, rotatorAddress = rotAddr,
                             rotatorPort = rotPort, rotatorFormat = rotFmt,
                             frequencyState = freqState, frequencyAddress = freqAddr,
-                            frequencyPort = freqPort, frequencyFormat = freqFmt
+                            frequencyPort = freqPort, frequencyFormat = freqFmt,
+                            frequencyOffsetHz = freqOffsetHz
                         )
                     )
                 )
@@ -195,6 +174,9 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
             onSave = { onAction(SettingsAction.UpdateRadioControl(it)) }
         )
     }
+    if (dialogs.whatsNew) {
+        WhatsNewDialog(onDismiss = { dialogs.whatsNew = false })
+    }
 
     // URLs for top bar
     val uriHandler = LocalUriHandler.current
@@ -215,11 +197,11 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
             if (isVerticalLayout) {
                 TopBar {
                     TopCard(
-                        onClick = { safeOpenUri(appUrl) },
+                        onClick = { dialogs.whatsNew = true },
                         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)) {
@@ -241,9 +223,9 @@ 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) },
+                        onClick = { dialogs.whatsNew = true },
                         version = uiState.appVersionName,
                         modifier = Modifier.weight(1f)
                     )
@@ -299,8 +281,22 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
                     onRadioControlClick = { dialogs.radioControl = true }
                 )
             }
-            item { OtherCard(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())
+                    }
+                }
+            }
         }
     }
 }
@@ -479,40 +475,83 @@ private fun OtherCardPreview() = MainTheme {
         shouldSeeWarning = false,
         shouldSeeWhatsNew = false
     )
-    OtherCard(settings = values) {}
+    OtherCard(settings = values, onAction = {})
 }
 
 @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(
@@ -525,6 +564,21 @@ 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)
@@ -559,7 +613,6 @@ private fun CardCredits(modifier: Modifier = Modifier) {
     ElevatedCard(
         modifier = modifier
             .fillMaxWidth()
-            .height(268.dp)
     ) {
         Column(
             verticalArrangement = Arrangement.SpaceBetween,
@@ -593,7 +646,7 @@ private fun TopCard(onClick: () -> Unit, modifier: Modifier = Modifier, version:
                 .clickable { onClick() }) {
             Spacer(Modifier)
             Icon(
-                painter = painterResource(id = R.drawable.ic_satellites),
+                painter = painterResource(id = R.drawable.ic_sputnik),
                 contentDescription = null,
                 tint = MaterialTheme.colorScheme.primary
             )
@@ -644,6 +697,7 @@ private class DialogVisibility {
     var network by mutableStateOf(false)
     var bluetooth by mutableStateOf(false)
     var radioControl by mutableStateOf(false)
+    var whatsNew by mutableStateOf(false)
 }
 
 @Composable
@@ -651,12 +705,12 @@ private fun rememberDialogVisibility(): DialogVisibility {
     return rememberSaveable(saver = run {
         androidx.compose.runtime.saveable.Saver(
             save = {
-                listOf(it.position, it.locator, it.dataSources, it.network, it.bluetooth, it.radioControl)
+                listOf(it.position, it.locator, it.dataSources, it.network, it.bluetooth, it.radioControl, it.whatsNew)
             },
             restore = {
                 DialogVisibility().apply {
                     position = it[0]; locator = it[1]; dataSources = it[2]
-                    network = it[3]; bluetooth = it[4]; radioControl = it[5]
+                    network = it[3]; bluetooth = it[4]; radioControl = it[5]; whatsNew = it[6]
                 }
             }
         )
@@ -673,17 +727,14 @@ private class SettingsPermissions(
     val launchTleImport: () -> Unit,
     val launchTransceiverImport: () -> Unit,
     val launchBluetooth: () -> Unit,
-    val launchNetwork: () -> Unit,
-    val launchCustomSourcesPermission: () -> Unit
+    val launchNetwork: () -> Unit
 )
 
 @Composable
 private fun rememberSettingsPermissions(
     sendAction: (SettingsAction) -> Unit,
     onBluetoothGranted: () -> Unit,
-    onNetworkGranted: () -> Unit,
-    onCustomSourcesPermissionGranted: () -> Unit,
-    onCustomSourcesPermissionDenied: () -> Unit
+    onNetworkGranted: () -> Unit
 ): SettingsPermissions {
     val locationError = stringResource(R.string.prefs_loc_gps_error)
     val locationRequest = rememberLauncherForActivityResult(
@@ -720,15 +771,6 @@ 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 = {
@@ -745,13 +787,6 @@ 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

@@ -65,6 +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 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

@@ -123,6 +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.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)

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 +1,327 @@
+package com.rtbishop.look4sat.feature.status
+
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+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.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.heightIn
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+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.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.graphics.Color
+import androidx.compose.ui.graphics.ColorFilter
+import androidx.compose.ui.platform.LocalContext
+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.text.style.TextOverflow
+import androidx.compose.ui.unit.Dp
+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.IContainerProvider
+import com.rtbishop.look4sat.core.presentation.InfoDialog
+import com.rtbishop.look4sat.core.presentation.R
+import com.rtbishop.look4sat.core.presentation.layoutPadding
+import java.util.Calendar
+
+/** Fixed width per day tile — tablet-safe; name column absorbs remaining space. */
+private val TILE_WIDTH: Dp = 64.dp
+
+/**
+ * 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
+        statusText.contains("Telemetry", ignoreCase = true) || statusText.contains("Beacon", ignoreCase = true) ->
+            MaterialTheme.colorScheme.tertiaryContainer
+        statusText.contains("Not Heard", ignoreCase = true) ->
+            Color(0xFFDC267F)
+        else ->
+            MaterialTheme.colorScheme.error
+    }
+}
+
+@Composable
+fun SatStatusDestination() {
+    val context = LocalContext.current
+    val container = (context.applicationContext as IContainerProvider).getMainContainer()
+    val viewModel: SatStatusViewModel = viewModel(factory = SatStatusViewModel.factory(container))
+    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+    SatStatusScreen(uiState) { viewModel.refresh() }
+}
+
+@Composable
+private fun SatStatusScreen(uiState: SatStatusUiState, refresh: () -> Unit) {
+    var selectedDay by remember { mutableStateOf<Pair<SatStatus, SatDay>?>(null) }
+    Column(modifier = Modifier.fillMaxSize().layoutPadding()) {
+        StatusHeader(fetchedAtUtcMs = uiState.fetchedAtUtcMs, isRefreshing = uiState.isRefreshing, onRefresh = 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 = refresh) { Text(text = stringResource(id = R.string.amsat_retry)) }
+                }
+            }
+            else -> {
+                HeaderRow(statuses = uiState.statuses)
+                HorizontalDivider(thickness = 1.dp)
+                LazyColumn(modifier = Modifier.fillMaxSize()) {
+                    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) {
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 4.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 = 14.sp,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.weight(1f)
+        )
+        Box(
+            modifier = Modifier
+                .size(32.dp)
+                .clip(CircleShape)
+                .background(MaterialTheme.colorScheme.surfaceVariant)
+                .clickable(onClick = onRefresh),
+            contentAlignment = Alignment.Center
+        ) {
+            if (isRefreshing) {
+                CircularProgressIndicator(modifier = Modifier.size(16.dp), strokeWidth = 2.dp)
+            } else {
+                Image(
+                    painter = painterResource(id = R.drawable.ic_refresh),
+                    contentDescription = stringResource(id = R.string.amsat_refresh),
+                    modifier = Modifier.size(16.dp),
+                    colorFilter = ColorFilter.tint(MaterialTheme.colorScheme.primary)
+                )
+            }
+        }
+    }
+}
+
+/** Legend: FlowRow of colored chips — wraps to two lines on narrow screens, stays one line when wide. */
+@Composable
+private fun LegendRow() {
+    val legend = listOf(
+        stringResource(id = R.string.amsat_active) to Color(0xFF648FFF),
+        stringResource(id = R.string.amsat_tlm) to Color(0xFFFFB000),
+        stringResource(id = R.string.amsat_not_heard) to Color(0xFFDC267F),
+        stringResource(id = R.string.amsat_conflict) to Color(0xFFFE6100)
+    )
+    FlowRow(
+        modifier = Modifier.fillMaxWidth().padding(bottom = 6.dp),
+        horizontalArrangement = Arrangement.spacedBy(6.dp),
+        verticalArrangement = Arrangement.spacedBy(6.dp)
+    ) {
+        legend.forEach { (label, color) ->
+            val alphaColor = color.copy(alpha = 0.25f)
+            Row(
+                modifier = Modifier
+                    .clip(RoundedCornerShape(32.dp))
+                    .background(alphaColor)
+                    .padding(horizontal = 12.dp, vertical = 4.dp),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Box(
+                    modifier = Modifier
+                        .size(8.dp)
+                        .clip(RoundedCornerShape(4.dp))
+                        .background(color)
+                )
+                Spacer(modifier = Modifier.width(6.dp))
+                Text(
+                    text = label,
+                    fontSize = 14.sp,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+            }
+        }
+    }
+}
+
+/** Header: satellite name column + fixed-width date labels aligned to tiles. */
+@Composable
+private fun HeaderRow(statuses: List<SatStatus>) {
+    val dates = statuses.firstOrNull()?.days?.map { it.dateLabel } ?: emptyList()
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        Text(
+            text = stringResource(id = R.string.amsat_name),
+            fontSize = 12.sp,
+            fontWeight = FontWeight.Medium,
+            color = MaterialTheme.colorScheme.primary,
+            modifier = Modifier.weight(1f).padding(start = 4.dp)
+        )
+        dates.forEach { date ->
+            Text(
+                text = date,
+                fontSize = 12.sp,
+                fontWeight = FontWeight.Medium,
+                textAlign = TextAlign.Center,
+                color = MaterialTheme.colorScheme.primary,
+                modifier = Modifier.width(TILE_WIDTH)
+            )
+        }
+    }
+}
+
+/** Satellite row: name takes remaining width; day tiles are fixed-width (tablet-safe). */
+@Composable
+private fun StatusRow(status: SatStatus, onClickDay: (SatDay) -> Unit) {
+    val noReportGray = 0xFFC0C0C0L
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        Text(
+            text = status.name,
+            fontSize = 14.sp,
+            maxLines = 1,
+            overflow = TextOverflow.Ellipsis,
+            modifier = Modifier.weight(1f).padding(end = 4.dp)
+        )
+        status.days.forEach { day ->
+            val slot = day.slots.firstOrNull { it.statusColor != noReportGray } ?: day.slots.first()
+            DayCell(
+                slot = slot,
+                modifier = Modifier.width(TILE_WIDTH).padding(horizontal = 2.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(28.dp)
+            .clip(RoundedCornerShape(4.dp))
+            .background(color)
+            .clickable(onClick = onClick),
+        contentAlignment = Alignment.Center
+    ) {
+        if (slot.count > 0) {
+            Text(text = slot.count.toString(), fontSize = 13.sp, fontWeight = FontWeight.Bold, color = Color.White)
+        }
+    }
+}
+
+/** Report detail dialog (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] }
+    InfoDialog(title = "$statusName · ${day.dateLabel}", onDismiss = onDismiss, onAccept = onDismiss) {
+        if (dayReports.isEmpty()) {
+            Text(stringResource(id = R.string.amsat_no_reports))
+            Spacer(modifier = Modifier.height(8.dp))
+        } else {
+            LazyColumn(modifier = Modifier.heightIn(max = 480.dp)) {
+                items(dayReports) { report ->
+                    Column(modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 8.dp)) {
+                        Row(verticalAlignment = Alignment.CenterVertically) {
+                            Box(
+                                modifier = Modifier
+                                    .size(8.dp)
+                                    .clip(CircleShape)
+                                    .background(statusColorOf(report.statusText))
+                            )
+                            Spacer(modifier = Modifier.width(6.dp))
+                            Text(text = report.statusText, fontSize = 14.sp, fontWeight = FontWeight.Bold)
+                        }
+                        Text(
+                            text = "${report.call}  ${report.dateUtc}  ${report.timeUtc}" +
+                                if (report.grid.isNotBlank() && report.grid != "-") "  ${report.grid}" else "",
+                            fontSize = 14.sp,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                    }
+                    HorizontalDivider(thickness = 0.5.dp)
+                }
+            }
+        }
+    }
+}
+
+private val MONTH_ABBR = arrayOf("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec")
+
+private fun formatFetchedAt(utcMs: Long): String {
+    val cal = Calendar.getInstance()
+    cal.timeInMillis = utcMs
+    val day = cal.get(Calendar.DAY_OF_MONTH)
+    val month = MONTH_ABBR[cal.get(Calendar.MONTH)]
+    val year = cal.get(Calendar.YEAR)
+    val hh = cal.get(Calendar.HOUR_OF_DAY).toString().padStart(2, '0')
+    val mm = cal.get(Calendar.MINUTE).toString().padStart(2, '0')
+    val ss = cal.get(Calendar.SECOND).toString().padStart(2, '0')
+    return "$day$month $year - $hh:$mm:$ss"
+}

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

@@ -0,0 +1,95 @@
+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.IAmSatRepository
+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 amSatRepo: IAmSatRepository
+) : 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 = 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 = 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.amSatRepo)
+            }
+        }
+    }
+}

gradle.properties

@@ -2,4 +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.tooling.parallel=true
 org.gradle.workers.max=4

gradle/libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 #noinspection UnusedVersionCatalogEntry
-appVersionCode = "443"
+appVersionCode = "446"
 #noinspection UnusedVersionCatalogEntry
-appVersionName = "4.4.3"
+appVersionName = "4.4.6"
 #noinspection UnusedVersionCatalogEntry
 compileSdk = "37"
 #noinspection UnusedVersionCatalogEntry
@@ -23,7 +23,7 @@ compose-activity = "1.13.0"
 compose-lifecycle = "2.11.0"
 compose-navigation3 = "1.1.5"
 
-google-ksp = "2.3.8"
+google-ksp = "2.3.10"
 
 kotlin = "2.4.10"
 kotlin-coroutines = "1.11.0"

gradle/wrapper/gradle-wrapper.properties

@@ -1,7 +1,7 @@
-#Sat Jun 27 12:51:12 BST 2026
+#Tue Aug 11 14:16:53 CEST 2026
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.7.0-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"
 )