feat: cache AMSAT status while app is foreground

When adjusting RX in passband mode (via +/- buttons or slider), the old
code used TransponderMapper.mapDownlinkToUplink (pure passband mapping
without Doppler compensation), producing ~10kHz error at LEO velocities.

Fix: use DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset
for the full TX-from-RX round-trip, matching the RX→PASSBAND button
onClick logic. Also fixed frame mismatch: position now uses txLow/txRange
(Doppler-shifted frame) consistently.

.gitignore

@@ -68,3 +68,4 @@ fastlane/readme.md
 /app/release/output-metadata.json
 /app/release/
 /.kotlin/sessions/
+dist/

README.md

@@ -6,10 +6,12 @@
 
 ## 本仓库特色功能
 
+- **双站过境匹配（Mutual Pass）** — 输入友台经纬度/网格，筛选双方同时可见的卫星过境，在地图上同时显示双方仰角曲线和地面轨迹，支持一键跳转雷达页查看详情
 - **线性卫星转发器频率计算器** — 在雷达页的 Calculator 标签页中，支持 TX/RX 双向多普勒频率计算，以及下行频率偏移（offset）输入，方便操作带偏移的线性卫星
 - **CW 解码器** — 集成 Morse Expert 解码引擎，支持瀑布图、实时解码文本
 - **Passband 模式** — 支持通过位置滑块（Passband）自动计算 TX/RX 频率，避免切换时跳变
-- **中文界面优化** — 翻译修正、UI 布局调整
+- **AMSAT 状态页** — 实时查看卫星的业余无线电转发器状态（开启/关闭/待机），支持 72 小时历史记录回放
+- **中文界面优化** — 翻译修正、UI 布局调整，系统语言自动切换
 
 ## 上游仓库
 
@@ -23,4 +25,14 @@
 
 ## 许可证
 
-GNU General Public License v3.0。详见 [LICENSE](LICENSE)。
+GNU General Public License v3.0。详见 [LICENSE](LICENSE)。
+
+## Star History
+
+<a href="https://star-history.dera.page/#atsunatsu/Look4Sat&type=timeline&legend=top-left">
+ <picture>
+   <source media="(prefers-color-scheme: dark)" srcset="https://star-history.dera.page/svg?repos=atsunatsu/Look4Sat&type=timeline&theme=dark&legend=top-left" />
+   <source media="(prefers-color-scheme: light)" srcset="https://star-history.dera.page/svg?repos=atsunatsu/Look4Sat&type=timeline&legend=top-left" />
+   <img alt="Star History Chart" src="https://star-history.dera.page/svg?repos=atsunatsu/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/MainApplication.kt

@@ -17,7 +17,10 @@
  */
 package com.rtbishop.look4sat
 
+import android.app.Activity
 import android.app.Application
+import android.app.Application.ActivityLifecycleCallbacks
+import android.os.Bundle
 import com.rtbishop.look4sat.core.data.injection.MainContainer
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.domain.repository.IMainContainer
@@ -35,12 +38,34 @@ class MainApplication : Application(), IContainerProvider {
     override fun onCreate() {
         super.onCreate()
         container = MainContainer(this)
+        clearAmSatCacheOnAppBackground()
         // trigger automatic update every 48 hours
         container.appScope.launch { checkAutoUpdate() }
         // load satellite data on every app start
         container.appScope.launch { container.satelliteRepo.initRepository() }
     }
 
+    private fun clearAmSatCacheOnAppBackground() {
+        registerActivityLifecycleCallbacks(object : ActivityLifecycleCallbacks {
+            private var startedActivityCount = 0
+
+            override fun onActivityStarted(activity: Activity) {
+                startedActivityCount += 1
+            }
+
+            override fun onActivityStopped(activity: Activity) {
+                startedActivityCount = (startedActivityCount - 1).coerceAtLeast(0)
+                if (startedActivityCount == 0) container.amSatRepo.clearStatusCache()
+            }
+
+            override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) = Unit
+            override fun onActivityResumed(activity: Activity) = Unit
+            override fun onActivityPaused(activity: Activity) = Unit
+            override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle) = Unit
+            override fun onActivityDestroyed(activity: Activity) = Unit
+        })
+    }
+
     private suspend fun checkAutoUpdate(timeNow: Long = System.currentTimeMillis()) {
         if (container.settingsRepo.otherSettings.value.stateOfAutoUpdate) {
             val timeDelta = timeNow - container.settingsRepo.databaseState.value.updateTimestamp

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
@@ -87,38 +85,42 @@ 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.SatStatusScreen
+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()
                 }
             }
         }
@@ -130,8 +132,12 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
     val backStack = rememberNavBackStack(Screen.Passes)
     val currentKey = backStack.lastOrNull()
     val navigateBack: () -> Unit = { backStack.removeLastOrNull() }
+    val navigateToMap: () -> Unit = {
+        while (backStack.size > 1) backStack.removeAt(backStack.size - 1)
+        backStack.add(Screen.Map)
+    }
     val fadeTransition = fadeIn(animationSpec = tween(350)) togetherWith fadeOut(animationSpec = tween(350))
-    val navItems = listOf(Screen.Satellites, Screen.Passes, Screen.Radar, Screen.Mutual, Screen.Map, Screen.AMSAT, Screen.Settings)
+    val navItems = listOf(Screen.Satellites, Screen.Passes, Screen.AMSAT, Screen.Mutual, Screen.Settings)
 
     val context = LocalContext.current
     val container = (context.applicationContext as IContainerProvider).getMainContainer()
@@ -155,10 +161,9 @@ 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.Mutual -> screen is Screen.Mutual
-                        is Screen.Map -> screen is Screen.Map
+                        is Screen.Map -> screen is Screen.Passes
                         is Screen.AMSAT -> screen is Screen.AMSAT
+                        is Screen.Mutual -> screen is Screen.Mutual
                         is Screen.Settings -> screen is Screen.Settings
                         else -> false
                     }
@@ -167,7 +172,7 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
                         label = { Text(stringResource(screen.titleResId)) },
                         selected = isSelected,
                         onClick = {
-                            if (isSelected) return@item
+                            if (isSelected && !(currentKey is Screen.Map && screen is Screen.Passes)) return@item
                             while (backStack.size > 1) backStack.removeAt(backStack.size - 1)
                             if (screen !is Screen.Passes) backStack.add(screen)
                         }
@@ -202,15 +207,14 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
                             SatellitesDestination(navigateUp = navigateBack)
                         }
                         entry<Screen.Passes> {
-                            PassesDestination { catNum, aosTime ->
-                                container.setMutualPassData(MutualPassData())
-                                container.satelliteRepo.selectPass(catNum, aosTime)
-                                backStack.add(Screen.Radar)
-//                            navigateToRadar()
-                            }
-                        }
-                        entry<Screen.Radar> {
-                            RadarDestination(navigateUp = navigateBack)
+                            PassesDestination(
+                                navigateToRadar = { catNum, aosTime ->
+                                    container.setMutualPassData(MutualPassData())
+                                    container.satelliteRepo.selectPass(catNum, aosTime)
+                                    navigateToRadar()
+                                },
+                                navigateToMap = navigateToMap
+                            )
                         }
                         entry<Screen.Map> {
                             MapDestination()
@@ -218,17 +222,14 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
                         entry<Screen.Mutual> {
                             MutualScreen(
                                 viewModel = mutualViewModel,
-                                navigateUp = navigateBack,
                                 navigateToRadar = { catNum, aosTime, pass ->
                                     container.setMutualPassData(pass ?: MutualPassData())
                                     container.satelliteRepo.selectPass(catNum, aosTime)
-                                    backStack.add(Screen.Radar)
+                                    navigateToRadar()
                                 }
                             )
                         }
-                        entry<Screen.AMSAT> {
-                            SatStatusScreen(container = container)
-                        }
+                        entry<Screen.AMSAT> { SatStatusDestination() }
                         entry<Screen.Settings> {
                             SettingsDestination()
                         }
@@ -254,7 +255,7 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
                                 if (pass != null) {
                                     container.setMutualPassData(MutualPassData())
                                     container.satelliteRepo.selectPass(pass.catNum, pass.aosTime)
-                                    backStack.add(Screen.Radar)
+                                    navigateToRadar()
                                 }
                             }
                             .padding(horizontal = 12.dp, vertical = 6.dp)

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 {
@@ -53,51 +67,48 @@ class NetworkReporter(
                 .replace($$"$AZ", azimuth.toString())
                 .replace($$"$EL", el.toString())
                 .unescapeControlChars()
-            write(rotatorSocket, command) { rotatorConnected = false }
+            write(rotatorSocket, command) { resetRotatorConnection() }
         }
     }
 
     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 +127,34 @@ 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")
+        replace("""\r""", 13.toChar().toString())
+            .replace("""\n""", 10.toChar().toString())
+            .replace("""\t""", 9.toChar().toString())
 }

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

@@ -117,7 +117,8 @@ 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

@@ -1,5 +1,7 @@
 package com.rtbishop.look4sat.core.data.repository
 
+import com.rtbishop.look4sat.core.domain.model.AmSatReportSubmission
+import com.rtbishop.look4sat.core.domain.model.AmSatReportSubmitResult
 import com.rtbishop.look4sat.core.domain.model.SatDay
 import com.rtbishop.look4sat.core.domain.model.SatReport
 import com.rtbishop.look4sat.core.domain.model.SatSlot
@@ -8,10 +10,12 @@ 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.sync.Mutex
 import kotlinx.coroutines.withContext
 import org.json.JSONObject
 import java.text.SimpleDateFormat
 import java.util.Calendar
+import java.util.Date
 import java.util.Locale
 import java.util.TimeZone
 
@@ -28,23 +32,90 @@ private data class ApiReport(
 /** AMSAT status repository using RemoteSource (Clean Architecture: data layer handles HTTP). */
 class AmSatRepository(private val remoteSource: IRemoteSource) : IAmSatRepository {
 
+    private val statusCacheMutex = Mutex()
+
+    @Volatile
+    private var statusCache: SatStatusPage? = null
+
+    @Volatile
+    private var cacheGeneration = 0
+
     private val isoUtcFormat = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US).apply {
         timeZone = TimeZone.getTimeZone("UTC")
     }
 
-    override suspend fun fetchStatus(): SatStatusPage? = withContext(Dispatchers.IO) {
-        val nowSec = System.currentTimeMillis() / 1000
-        val catalogJson = remoteSource.getAmSatCatalog() ?: return@withContext null
-        val reportsJson = remoteSource.getAmSatReports(hours = 168, limit = 500) ?: return@withContext null
-        
-        val names = parseCatalog(catalogJson)
-        val reports = parseReports(reportsJson)
-        
-        if (names.isEmpty() && reports.isEmpty()) return@withContext null
-        
-        val statuses = buildStatuses(names, reports, nowSec)
-        val reportMap = reports.associate { it.id to toSatReport(it) }
-        SatStatusPage(System.currentTimeMillis(), statuses, reportMap)
+    override fun getCachedStatus(): SatStatusPage? = statusCache
+
+    override suspend fun fetchStatus(forceRefresh: Boolean): SatStatusPage? = withContext(Dispatchers.IO) {
+        statusCacheMutex.lock()
+        try {
+            if (!forceRefresh) statusCache?.let { return@withContext it }
+            val generation = cacheGeneration
+            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).also { page ->
+                if (generation == cacheGeneration) statusCache = page
+            }
+        } finally {
+            statusCacheMutex.unlock()
+        }
+    }
+
+    override fun clearStatusCache() {
+        statusCache = null
+        cacheGeneration += 1
+    }
+
+    override suspend fun submitReport(submission: AmSatReportSubmission): AmSatReportSubmitResult = withContext(Dispatchers.IO) {
+        val payload = JSONObject().apply {
+            put("name", submission.name)
+            put("report", submission.report)
+            put("callsign", submission.callsign)
+            put("reported_at", isoUtcFormat.format(Date(submission.reportedAtUtcMillis)))
+            if (submission.gridSquare.isNotBlank()) put("grid_square", submission.gridSquare)
+        }
+        val response = remoteSource.submitAmSatReport(payload.toString())
+            ?: return@withContext AmSatReportSubmitResult(success = false, message = "Network request failed")
+        val (code, body) = response
+        val errorMessage = parseSubmitError(body)
+        return@withContext if (code in 200..299 && errorMessage.isBlank()) {
+            AmSatReportSubmitResult(success = true, reportId = parseSubmitReportId(body))
+        } else {
+            AmSatReportSubmitResult(
+                success = false,
+                message = errorMessage.ifBlank { "HTTP $code" }
+            )
+        }
+    }
+
+    private fun parseSubmitError(json: String): String {
+        return try {
+            JSONObject(json).optJSONObject("error")?.optString("message").orEmpty()
+        } catch (_: Exception) {
+            ""
+        }
+    }
+
+    private fun parseSubmitReportId(json: String): String? {
+        return try {
+            val obj = JSONObject(json)
+            obj.optJSONObject("data")?.optString("id")?.takeIf { it.isNotBlank() }
+                ?: obj.optString("id").takeIf { it.isNotBlank() }
+        } catch (_: Exception) {
+            null
+        }
     }
 
     /** Parse catalog JSON to list of satellite names */
@@ -52,7 +123,7 @@ class AmSatRepository(private val remoteSource: IRemoteSource) : IAmSatRepositor
         return try {
             val arr = JSONObject(json).getJSONArray("data")
             (0 until arr.length()).map { arr.getJSONObject(it).getString("name") }
-        } catch (e: Exception) {
+        } catch (_: Exception) {
             emptyList()
         }
     }
@@ -73,7 +144,7 @@ class AmSatRepository(private val remoteSource: IRemoteSource) : IAmSatRepositor
                     reportedTimeUtcSec = parseIsoUtcSec(iso)
                 )
             }
-        } catch (e: Exception) {
+        } catch (_: Exception) {
             emptyList()
         }
     }
@@ -82,22 +153,22 @@ class AmSatRepository(private val remoteSource: IRemoteSource) : IAmSatRepositor
     private fun parseIsoUtcSec(iso: String): Long {
         return try {
             (isoUtcFormat.parse(iso)?.time ?: 0L) / 1000
-        } catch (e: Exception) {
+        } catch (_: Exception) {
             0L
         }
     }
 
-    /** Build one SatStatus (6 days x 12 slots) per catalog satellite, slotting reports by age. */
+    /** Build one SatStatus (3 days x 12 slots) per catalog satellite, slotting reports by age. */
     private fun buildStatuses(names: List<String>, reports: List<ApiReport>, nowSec: Long): List<SatStatus> {
         val byName = reports.groupBy { it.name }
         val monthAbbr = arrayOf("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec")
         val utc = Calendar.getInstance(TimeZone.getTimeZone("UTC"))
-        val labels = (0 until 6).map { d ->
+        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 72).map { slotIdx ->
+            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 }
@@ -112,7 +183,7 @@ class AmSatRepository(private val remoteSource: IRemoteSource) : IAmSatRepositor
                     )
                 }
             }
-            val days = (0 until 6).map { d ->
+            val days = (0 until 3).map { d ->
                 SatDay(dateLabel = labels[d], slots = slots.subList(d * 12, (d + 1) * 12))
             }
             SatStatus(name = name, days = days)

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

@@ -66,25 +66,26 @@ 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
+        val tleUrls = settings.satelliteUrls.filter { it.isNotBlank() }.map(::normalizeUrl).distinct()
+        val radioUrls = settings.transceiversUrls.filter { it.isNotBlank() }.map(::normalizeUrl).distinct()
+        val builtinTypesByUrl = Sources.satelliteDataUrls
+            .filterValues { it.isNotBlank() }
+            .mapValues { normalizeUrl(it.value) }
+            .entries
+            .associate { (type, url) -> url to type }
+        val importedTypeIds = mutableMapOf<String, MutableList<Int>>()
         // launch all network requests concurrently
-        val tleJobs = tleUrls.values.map { url -> async { url to remoteSource.getNetworkStream(url) } }
-        val radioJobs = radioUrls.values.map { url -> async { url to remoteSource.getNetworkStream(url) } }
-        // parse fetched data concurrently and associate with types
+        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 and associate known built-in URLs with existing type filters.
         val importedEntries = tleJobs.awaitAll().flatMap { (url, stream) ->
-            val type = tleUrls.entries.find { it.value == url }?.key ?: customSourceType
-            stream?.let { parseSatelliteStream(url, unwrapIfZipped(url, it)) }.orEmpty().also { entries ->
-                settingsRepo.setSatelliteTypeIds(type, entries.map { it.catnum })
-            }
+            val entries = stream?.let { parseSatelliteStream(url, unwrapIfZipped(url, it)) }.orEmpty()
+            val type = builtinTypesByUrl[url] ?: customSourceType
+            importedTypeIds.getOrPut(type) { mutableListOf() }.addAll(entries.map { it.catnum })
+            entries
         }
+        importedTypeIds.forEach { (type, ids) -> settingsRepo.setSatelliteTypeIds(type, ids.distinct()) }
         val importedRadios = radioJobs.awaitAll().flatMap { (url, stream) ->
             stream?.let { dataParser.parseJSONStream(unwrapIfZipped(url, it)) }.orEmpty()
         }
@@ -100,6 +101,9 @@ class DatabaseRepo(
         setUpdateSuccessful(0L)
     }
 
+    private fun normalizeUrl(url: String): String =
+        if (url.startsWith("http", ignoreCase = true)) url else "https://$url"
+
     private suspend fun parseSatelliteStream(url: String, stream: InputStream): List<OrbitalData> {
         val bufferedStream = stream.buffered()
         return when {

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

@@ -37,6 +37,10 @@ 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
+import java.util.Locale
+import com.rtbishop.look4sat.core.domain.model.Constants
+import com.rtbishop.look4sat.core.domain.source.Sources
 
 class SettingsRepo(
     private val locationManager: LocationManager,
@@ -67,6 +71,7 @@ class SettingsRepo(
     private val keyFrequencyAddress = "frequencyAddress"
     private val keyFrequencyPort = "frequencyPort"
     private val keyFrequencyFormat = "frequencyFormat"
+    private val keyFrequencyOffsetHz = "frequencyOffsetHz"
     private val keySelectedIds = "selectedIds"
     private val keySelectedTypes = "selectedTypes"
     private val keySelectedModes = "selectedModes"
@@ -91,7 +96,10 @@ class SettingsRepo(
     private val keyUseCustomTransceivers = "useCustomTransceivers"
     private val keyTleUrl = "tleUrl"
     private val keyTransceiversUrl = "transceiversUrl"
+    private val keySatelliteUrls = "satelliteUrls"
+    private val keyTransceiversUrls = "transceiversUrls"
     private val separatorComma = ","
+    private val separatorUrl = "\n"
 
     //region # Satellites selection settings
     private val _satelliteSelection = MutableStateFlow(getSelectedIds())
@@ -298,6 +306,10 @@ 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)
@@ -307,6 +319,7 @@ 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)
@@ -315,7 +328,7 @@ class SettingsRepo(
             putString(keyBluetoothFrequencyFormat, settings.bluetoothFrequencyFormat)
             putString(keyBluetoothFrequencyAddress, settings.bluetoothFrequencyAddress)
         }
-        _rcSettings.value = settings
+        _rcSettings.value = settings.copy(frequencyOffsetHz = clampedFreqOffsetHz)
     }
 
     private fun getRCSettings(): RCSettings = RCSettings(
@@ -327,6 +340,8 @@ 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",
@@ -382,20 +397,45 @@ 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 = getDataSourceUrls(
+            key = keySatelliteUrls,
+            defaultUrls = Sources.satelliteDataUrls.values.filter { it.isNotBlank() },
+            legacyEnabledKey = keyUseCustomTle,
+            legacyUrlKey = keyTleUrl
+        ),
+        transceiversUrls = getDataSourceUrls(
+            key = keyTransceiversUrls,
+            defaultUrls = Sources.transceiversDataUrls.values.filter { it.isNotBlank() },
+            legacyEnabledKey = keyUseCustomTransceivers,
+            legacyUrlKey = keyTransceiversUrl
+        )
     )
+
+    private fun getDataSourceUrls(
+        key: String,
+        defaultUrls: List<String>,
+        legacyEnabledKey: String,
+        legacyUrlKey: String
+    ): List<String> {
+        val stored = preferences.getString(key, null)
+            ?.split(separatorUrl)
+            ?.map { it.trim() }
+            ?.filter { it.isNotBlank() }
+        if (stored != null) return stored
+        val legacyCustomUrl = preferences.getString(legacyUrlKey, null)?.trim().orEmpty()
+        return if (preferences.getBoolean(legacyEnabledKey, false) && legacyCustomUrl.isNotBlank()) {
+            (defaultUrls + legacyCustomUrl).distinct()
+        } else {
+            defaultUrls
+        }
+    }
     //endregion
 
     //region # Radio control settings
@@ -436,4 +476,55 @@ class SettingsRepo(
         splitMode = preferences.getBoolean(keyRadioSplitMode, false)
     )
     //endregion
+
+    //region # Per-satellite calculator offset settings
+    private val keySatelliteOffsets = "satelliteOffsets"
+    private val keyLegacySatelliteOffsetPrefix = "offset_khz_"
+
+    override fun getSatelliteOffset(catnum: Int): String {
+        val json = preferences.getString(keySatelliteOffsets, "{}") ?: "{}"
+        val stored = try {
+            JSONObject(json).optString(catnum.toString(), "")
+        } catch (_: Exception) {
+            ""
+        }
+        if (stored.isNotEmpty()) return stored
+
+        // Lazy migration from the fork's old UI-layer implementation, which stored
+        // one SharedPreferences entry per satellite directly from TransceiversPage.
+        val legacyKey = "$keyLegacySatelliteOffsetPrefix$catnum"
+        val legacy = preferences.getString(legacyKey, "").orEmpty()
+        if (legacy.isNotEmpty()) {
+            setSatelliteOffset(catnum, legacy)
+        }
+        return legacy
+    }
+
+    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) {
+            if (offset.isEmpty()) "{}" else """{"$catnum": "$offset"}"""
+        }
+        preferences.edit {
+            putString(keySatelliteOffsets, updated)
+            remove("$keyLegacySatelliteOffsetPrefix$catnum")
+        }
+    }
+    //endregion
+
+    //region # AMSAT status report settings
+    private val keyAmSatCallsign = "amSatCallsign"
+
+    override fun getAmSatCallsign(): String {
+        return preferences.getString(keyAmSatCallsign, "").orEmpty()
+    }
+
+    override fun setAmSatCallsign(callsign: String) {
+        preferences.edit { putString(keyAmSatCallsign, callsign.trim().uppercase(Locale.US)) }
+    }
+    //endregion
 }

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

@@ -22,9 +22,10 @@ import androidx.core.net.toUri
 import com.rtbishop.look4sat.core.domain.source.IRemoteSource
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.withContext
+import okhttp3.MediaType.Companion.toMediaType
 import okhttp3.OkHttpClient
 import okhttp3.Request
-import java.io.ByteArrayInputStream
+import okhttp3.RequestBody.Companion.toRequestBody
 import java.io.InputStream
 
 class RemoteSource(
@@ -46,10 +47,14 @@ 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.
+            // Closing the stream returns the connection to OkHttp's pool.
+            response.body.byteStream().buffered()
         } catch (exception: Exception) {
             println("RemoteSource network stream exception: $exception")
             null
@@ -87,4 +92,21 @@ class RemoteSource(
             null
         }
     }
+
+    override suspend fun submitAmSatReport(payloadJson: String): Pair<Int, String>? = withContext(dispatcher) {
+        try {
+            val body = payloadJson.toRequestBody("application/json; charset=utf-8".toMediaType())
+            val request = Request.Builder()
+                .url("https://www.amsat.org/status/api/v1/reports.php")
+                .header("User-Agent", "Look4Sat")
+                .post(body)
+                .build()
+            httpClient.newCall(request).execute().use { response ->
+                response.code to response.body.string()
+            }
+        } catch (exception: Exception) {
+            println("RemoteSource submitAmSatReport exception: $exception")
+            null
+        }
+    }
 }

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

@@ -0,0 +1,87 @@
+package com.rtbishop.look4sat.core.data.repository
+
+import com.rtbishop.look4sat.core.domain.model.SatStatus
+import com.rtbishop.look4sat.core.domain.model.SatStatusPage
+import com.rtbishop.look4sat.core.domain.source.IRemoteSource
+import kotlinx.coroutines.test.runTest
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertSame
+import org.junit.Test
+import java.io.InputStream
+
+class AmSatRepositoryTest {
+
+    @Test
+    fun fetchStatusReturnsSeededCacheUntilCacheIsCleared() = runTest {
+        val remoteSource = FakeAmSatRemoteSource()
+        val repository = AmSatRepository(remoteSource)
+        val cachedPage = SatStatusPage(
+            fetchedAtUtcMs = 123L,
+            statuses = listOf(SatStatus(name = "AO-7", days = emptyList())),
+            reports = emptyMap()
+        )
+        repository.seedStatusCache(cachedPage)
+
+        val firstPage = repository.fetchStatus()
+        val secondPage = repository.fetchStatus()
+
+        assertSame(cachedPage, firstPage)
+        assertSame(cachedPage, secondPage)
+        assertSame(cachedPage, repository.getCachedStatus())
+        assertEquals(0, remoteSource.catalogRequests)
+        assertEquals(0, remoteSource.reportRequests)
+
+        repository.clearStatusCache()
+        assertNull(repository.getCachedStatus())
+        repository.fetchStatus()
+
+        assertEquals(1, remoteSource.catalogRequests)
+        assertEquals(1, remoteSource.reportRequests)
+    }
+
+    @Test
+    fun forceRefreshBypassesCachedPage() = runTest {
+        val remoteSource = FakeAmSatRemoteSource()
+        val repository = AmSatRepository(remoteSource)
+        repository.seedStatusCache(
+            SatStatusPage(
+                fetchedAtUtcMs = 123L,
+                statuses = listOf(SatStatus(name = "AO-7", days = emptyList())),
+                reports = emptyMap()
+            )
+        )
+
+        repository.fetchStatus(forceRefresh = true)
+
+        assertEquals(1, remoteSource.catalogRequests)
+        assertEquals(1, remoteSource.reportRequests)
+    }
+}
+
+private fun AmSatRepository.seedStatusCache(page: SatStatusPage) {
+    val cacheField = AmSatRepository::class.java.getDeclaredField("statusCache")
+    cacheField.isAccessible = true
+    cacheField.set(this, page)
+}
+
+private class FakeAmSatRemoteSource : IRemoteSource {
+    var catalogRequests = 0
+    var reportRequests = 0
+
+    override suspend fun getFileStream(uri: String): InputStream? = null
+
+    override suspend fun getNetworkStream(url: String): InputStream? = null
+
+    override suspend fun getAmSatCatalog(): String? {
+        catalogRequests += 1
+        return """{"data":[{"name":"AO-7"}]}"""
+    }
+
+    override suspend fun getAmSatReports(hours: Int, limit: Int): String? {
+        reportRequests += 1
+        return """{"data":[]}"""
+    }
+
+    override suspend fun submitAmSatReport(payloadJson: String): Pair<Int, String>? = null
+}

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

@@ -91,10 +91,8 @@ 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)
@@ -124,6 +122,12 @@ 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
+
+    override suspend fun submitAmSatReport(payloadJson: String): Pair<Int, String>? = null
 }
 
 private class FakeLocalSource : ILocalSource {
@@ -176,7 +180,7 @@ 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(
@@ -222,13 +226,19 @@ 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
+
+    override fun getAmSatCallsign(): String = ""
+
+    override fun setAmSatCallsign(callsign: String) = Unit
 }
 
 private fun defaultDataSourcesSettings(): DataSourcesSettings {
     return DataSourcesSettings(
-        useCustomTLE = false,
-        useCustomTransceivers = false,
-        tleUrl = "",
-        transceiversUrl = ""
+        satelliteUrls = emptyList(),
+        transceiversUrls = emptyList()
     )
 }

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

@@ -0,0 +1,17 @@
+package com.rtbishop.look4sat.core.domain.model
+
+/** One public AMSAT satellite status report submission. */
+data class AmSatReportSubmission(
+    val name: String,
+    val report: String,
+    val callsign: String,
+    val gridSquare: String,
+    val reportedAtUtcMillis: Long
+)
+
+/** Result of submitting an AMSAT satellite status report. */
+data class AmSatReportSubmitResult(
+    val success: Boolean,
+    val message: String = "",
+    val reportId: String? = null
+)

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

@@ -23,10 +23,10 @@ data class SatDay(
     val slots: List<SatSlot> // 12 槽(00-02 ... 22-24)
 )
 
-/** One satellite, 6 days of state */
+/** One satellite, 3 days of state */
 data class SatStatus(
     val name: String,        // "AO-123_[FM]"
-    val days: List<SatDay>   // 6 天(新→旧)
+    val days: List<SatDay>   // 3 days (newest first)
 )
 
 /** Overall page parse result */

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

@@ -42,6 +42,7 @@ 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,
@@ -66,10 +67,8 @@ data class OtherSettings(
 )
 
 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/predict/CelestialComputer.kt

@@ -424,11 +424,15 @@ object CelestialComputer {
         }
         if (sunrise == 0.0) sunrise = daynum
 
-        // Phase 4: fast-forward through the day until sun drops back below threshold
-        daynum = sunrise
+        // Phase 4: fast-forward through the day until sun drops back below threshold.
+        // Start from just after sunrise (small offset) so the sun is clearly above
+        // the threshold. This prevents a bug where Phase 3 converges to a point
+        // slightly below -threshold, causing Phase 4 to skip and Phase 5 to converge
+        // to the same time as sunrise, producing identical sunrise/sunset times.
+        daynum = sunrise + 0.001
         sunPos = getSunPosition(observer, daynumToMillis(daynum))
         guard = 0
-        while (sunPos.elevation > -threshold && guard++ < 500) {
+        while (sunPos.elevation >= -threshold && guard++ < 500) {
             daynum += 0.008
             sunPos = getSunPosition(observer, daynumToMillis(daynum))
         }

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

@@ -1,9 +1,20 @@
 package com.rtbishop.look4sat.core.domain.repository
 
+import com.rtbishop.look4sat.core.domain.model.AmSatReportSubmission
+import com.rtbishop.look4sat.core.domain.model.AmSatReportSubmitResult
 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?
+    /** Cached AMSAT status page for the current foreground session, if any. */
+    fun getCachedStatus(): SatStatusPage?
+
+    /** Fetch and parse the AMSAT status page; null on failure. */
+    suspend fun fetchStatus(forceRefresh: Boolean = false): SatStatusPage?
+
+    /** Clear the foreground-session status cache. */
+    fun clearStatusCache()
+
+    /** Submit a public AMSAT satellite status report. */
+    suspend fun submitReport(submission: AmSatReportSubmission): AmSatReportSubmitResult
 }

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

@@ -77,4 +77,14 @@ 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
+
+    //region # AMSAT status report settings
+    fun getAmSatCallsign(): String
+    fun setAmSatCallsign(callsign: String)
+    //endregion
 }

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

@@ -24,4 +24,5 @@ interface IRemoteSource {
     suspend fun getNetworkStream(url: String): InputStream?
     suspend fun getAmSatCatalog(): String?
     suspend fun getAmSatReports(hours: Int, limit: Int): String?
+    suspend fun submitAmSatReport(payloadJson: String): Pair<Int, String>?
 }

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

@@ -46,9 +46,11 @@ object Sources {
         "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",
+        "ARISS" to "https://live.ariss.org/iss.txt",
         "Other" to "" // key for sats filter
     )
     val transceiversDataUrls = mapOf(
-        "SatNOGS" to "https://db.satnogs.org/api/transmitters/?format=json&status=active"
+        "SatNOGS" to "https://db.satnogs.org/api/transmitters/?format=json&status=active",
+        "R4UAB" to "https://r4uab.ru/transmitters.json"
     )
 }

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

@@ -280,6 +280,40 @@ fun getDefaultPass(): OrbitalPass = OrbitalPass(
     altitude = 0, maxElevation = 0.0, orbitalObject = NearEarthObject(defaultOrbitalData), progress = 0f
 )
 
+@Composable
+fun InfoDialog(
+    title: String,
+    onDismiss: () -> Unit,
+    onAccept: () -> Unit,
+    extraAction: (@Composable () -> Unit)? = null,
+    content: @Composable () -> Unit
+) {
+    DialogShell(onDismissRequest = onDismiss) { padding ->
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(start = padding, top = padding, end = padding)
+        ) {
+            Text(
+                text = title,
+                fontSize = 16.sp,
+                fontWeight = FontWeight.Medium,
+                color = MaterialTheme.colorScheme.primary,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis,
+                modifier = Modifier.weight(1f)
+            )
+            extraAction?.let {
+                it()
+                Spacer(modifier = Modifier.width(8.dp))
+            }
+            CardButton(onClick = onAccept, text = stringResource(R.string.btn_accept))
+        }
+        content()
+    }
+}
+
 @Composable
 fun SharedDialog(
     title: String, onCancel: () -> Unit, onAccept: () -> Unit, content: @Composable () -> Unit

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

@@ -29,9 +29,6 @@ sealed class Screen(val iconResId: Int, val titleResId: Int) : NavKey {
     @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)
-
     @Serializable
     data object Map : Screen(R.drawable.ic_map, R.string.nav_map)
 

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

@@ -0,0 +1,3 @@
+<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="M19,13H13V19H11V13H5V11H11V5H13V11H19V13Z" />
+</vector>

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

@@ -9,4 +9,4 @@
     <path
         android:fillColor="#FF000000"
         android:pathData="M17.65,6.35C16.2,4.9 14.21,4 12,4c-4.42,0 -7.99,3.58 -7.99,8s3.57,8 7.99,8c3.73,0 6.84,-2.55 7.73,-6h-2.08c-0.82,2.33 -3.04,4 -5.65,4 -3.31,0 -6,-2.69 -6,-6s2.69,-6 6,-6c1.66,0 3.14,0.69 4.22,1.78L13,11h7V4l-2.35,2.35z" />
-</vector>
+</vector>

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

@@ -112,6 +112,13 @@
     <string name="prefs_data_update_success">Actualización completada con éxito</string>
 
     <string name="prefs_data_sources_title">Custom data sources</string>
+    <string name="prefs_data_import_satellites_error">No satellites imported. Select a valid TLE/3LE (.txt) or OMM (.csv) file.</string>
+    <string name="prefs_data_import_transceivers_error">No transceivers imported. Select a valid SatNOGS (.json) file.</string>
+    <string name="prefs_data_sources_url_title" translatable="false">URL</string>
+    <string name="prefs_data_sources_satellites_label" translatable="false">Satellites data</string>
+    <string name="prefs_data_sources_transceivers_label" translatable="false">Transceivers data</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_data_sources_tle_switch">Custom TLE URL</string>
     <string name="prefs_data_sources_transceivers_switch">Custom transceivers URL</string>
 

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

@@ -111,6 +111,13 @@
     <string name="prefs_data_update_success">Обновление прошло успешно</string>
 
     <string name="prefs_data_sources_title">Свои источники данных</string>
+    <string name="prefs_data_import_satellites_error">No satellites imported. Select a valid TLE/3LE (.txt) or OMM (.csv) file.</string>
+    <string name="prefs_data_import_transceivers_error">No transceivers imported. Select a valid SatNOGS (.json) file.</string>
+    <string name="prefs_data_sources_url_title" translatable="false">URL</string>
+    <string name="prefs_data_sources_satellites_label" translatable="false">Satellites data</string>
+    <string name="prefs_data_sources_transceivers_label" translatable="false">Transceivers data</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_data_sources_tle_switch">Custom TLE URL</string>
     <string name="prefs_data_sources_transceivers_switch">Custom Transceivers URL</string>
 

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

@@ -112,6 +112,13 @@
     <string name="prefs_data_update_success">යාවත්කාලීනය සම්පූර්ණ කිරීම සාර්ථකයි</string>
 
     <string name="prefs_data_sources_title">Custom data sources</string>
+    <string name="prefs_data_import_satellites_error">No satellites imported. Select a valid TLE/3LE (.txt) or OMM (.csv) file.</string>
+    <string name="prefs_data_import_transceivers_error">No transceivers imported. Select a valid SatNOGS (.json) file.</string>
+    <string name="prefs_data_sources_url_title" translatable="false">URL</string>
+    <string name="prefs_data_sources_satellites_label" translatable="false">Satellites data</string>
+    <string name="prefs_data_sources_transceivers_label" translatable="false">Transceivers data</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_data_sources_tle_switch">Custom TLE URL</string>
     <string name="prefs_data_sources_transceivers_switch">Custom transceivers URL</string>
 

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

@@ -143,6 +143,12 @@
     <string name="prefs_data_update_success">Güncelleme başarıyla tamamlandı</string>
 
     <string name="prefs_data_sources_title">Özel veri kaynakları</string>
+    <string name="prefs_data_import_satellites_error">No satellites imported. Select a valid TLE/3LE (.txt) or OMM (.csv) file.</string>
+    <string name="prefs_data_import_transceivers_error">No transceivers imported. Select a valid SatNOGS (.json) file.</string>
+    <string name="prefs_data_sources_satellites_label" translatable="false">Satellites data</string>
+    <string name="prefs_data_sources_transceivers_label" translatable="false">Transceivers data</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_data_sources_tle_switch">Özel TLE URL</string>
     <string name="prefs_data_sources_transceivers_switch">Özel transceiver URL</string>
     <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>

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

@@ -112,6 +112,13 @@
     <string name="prefs_data_update_success">Оновлення успішне</string>
 
     <string name="prefs_data_sources_title">Custom data sources</string>
+    <string name="prefs_data_import_satellites_error">No satellites imported. Select a valid TLE/3LE (.txt) or OMM (.csv) file.</string>
+    <string name="prefs_data_import_transceivers_error">No transceivers imported. Select a valid SatNOGS (.json) file.</string>
+    <string name="prefs_data_sources_url_title" translatable="false">URL</string>
+    <string name="prefs_data_sources_satellites_label" translatable="false">Satellites data</string>
+    <string name="prefs_data_sources_transceivers_label" translatable="false">Transceivers data</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_data_sources_tle_switch">Custom TLE URL</string>
     <string name="prefs_data_sources_transceivers_switch">Custom transceivers URL</string>
 

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

@@ -53,6 +53,26 @@
     <string name="amsat_load_failed">加载失败 - 检查网络后重试</string>
     <string name="amsat_no_reports">此时间段无报告</string>
     <string name="amsat_close">关闭</string>
+    <string name="amsat_upload">上传</string>
+    <string name="amsat_upload_back">返回</string>
+    <string name="amsat_upload_report">上传报告到 AMSAT</string>
+    <string name="amsat_upload_status">状态</string>
+    <string name="amsat_upload_callsign">呼号</string>
+    <string name="amsat_upload_grid">网格</string>
+    <string name="amsat_upload_time_now">时间：当前 UTC %s</string>
+    <string name="amsat_upload_submit">提交到 AMSAT</string>
+    <string name="amsat_upload_confirm">确认上传</string>
+    <string name="amsat_upload_confirm_title">确认上传到 AMSAT</string>
+    <string name="amsat_upload_confirm_message">这条公开报告将上传到 AMSAT。\n卫星：%1$s\n状态：%2$s\n呼号：%3$s\n网格：%4$s</string>
+    <string name="amsat_upload_grid_none">未填写</string>
+    <string name="amsat_upload_success">报告已上传</string>
+    <string name="amsat_upload_failed">上传失败：%s</string>
+    <string name="amsat_upload_callsign_required">请填写呼号</string>
+    <string name="amsat_upload_grid_invalid">网格应为 4 或 6 位 Maidenhead 定位符</string>
+    <string name="amsat_upload_active">活跃</string>
+    <string name="amsat_upload_tlm">遥测/信标</string>
+    <string name="amsat_upload_not_heard">未听到</string>
+    <string name="amsat_upload_crew_active">ISS 语音</string>
 
     <!-- Radar screen -->
     <string name="radar_back">后退</string>
@@ -136,6 +156,9 @@
     <string name="prefs_data_sources_title">自定义数据源</string>
     <string name="prefs_data_sources_tle_switch">自定义TLE URL</string>
     <string name="prefs_data_sources_transceivers_switch">自定义收发器URL</string>
+    <string name="prefs_data_sources_url_title" translatable="false">URL</string>
+    <string name="prefs_data_sources_satellites_label">卫星数据</string>
+    <string name="prefs_data_sources_transceivers_label">收发器数据</string>
 
     <string name="prefs_data_output_title">数据输出</string>
     <string name="prefs_net_output">网络</string>
@@ -149,6 +172,8 @@
     <string name="prefs_net_frequency_switch">启用多普勒频率输出</string>
     <string name="prefs_net_frequency_address_hint">IP:端口</string>
     <string name="prefs_net_frequency_format_hint">数据格式</string>
+    <string name="prefs_net_frequency_offset_hint" translatable="false">频率偏移 (Hz)</string>
+    <string name="prefs_net_frequency_offset_help" translatable="false">范围：-50000 到 50000 Hz。正值提高上报频率，负值降低上报频率。</string>
 
     <string name="prefs_bt_title">蓝牙数据输出</string>
     <string name="prefs_bt_rotator_switch">启用方位俯仰角输出</string>

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

@@ -70,6 +70,26 @@
     <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>
+    <string name="amsat_upload">Upload</string>
+    <string name="amsat_upload_back">Back</string>
+    <string name="amsat_upload_report">Upload report to AMSAT</string>
+    <string name="amsat_upload_status">Status</string>
+    <string name="amsat_upload_callsign">Callsign</string>
+    <string name="amsat_upload_grid">Grid</string>
+    <string name="amsat_upload_time_now">Time: current UTC %s</string>
+    <string name="amsat_upload_submit">Submit to AMSAT</string>
+    <string name="amsat_upload_confirm">Upload</string>
+    <string name="amsat_upload_confirm_title">Confirm AMSAT upload</string>
+    <string name="amsat_upload_confirm_message">This public report will be uploaded to AMSAT.\nSatellite: %1$s\nStatus: %2$s\nCallsign: %3$s\nGrid: %4$s</string>
+    <string name="amsat_upload_grid_none">Not provided</string>
+    <string name="amsat_upload_success">Report uploaded</string>
+    <string name="amsat_upload_failed">Upload failed: %s</string>
+    <string name="amsat_upload_callsign_required">Callsign is required</string>
+    <string name="amsat_upload_grid_invalid">Grid must be a 4 or 6 character Maidenhead locator</string>
+    <string name="amsat_upload_active">Active</string>
+    <string name="amsat_upload_tlm">TLM/Beacon</string>
+    <string name="amsat_upload_not_heard">Not Heard</string>
+    <string name="amsat_upload_crew_active">Crew Active</string>
 
     <!-- Radar screen -->
     <string name="radar_back">Back</string>
@@ -171,6 +191,8 @@
     <string name="prefs_data_sources_tle_switch">Custom TLE URL</string>
     <string name="prefs_data_sources_transceivers_switch">Custom transceivers URL</string>
     <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>
+    <string name="prefs_data_sources_satellites_label">Satellites data</string>
+    <string name="prefs_data_sources_transceivers_label">Transceivers data</string>
 
     <string name="prefs_data_output_title">Data output</string>
     <string name="prefs_net_output">Network</string>
@@ -194,6 +216,8 @@
     <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 data output</string>
     <string name="prefs_bt_rotator_switch">Enable rotation output</string>

feature/mutual/src/main/java/com/rtbishop/look4sat/feature/mutual/MutualScreen.kt

@@ -63,7 +63,6 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.rtbishop.look4sat.core.domain.repository.MutualPassData
 import com.rtbishop.look4sat.core.domain.repository.TrackSampleData
-import com.rtbishop.look4sat.core.presentation.IconCard
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.ScreenColumn
 import com.rtbishop.look4sat.core.presentation.TopBar
@@ -75,7 +74,6 @@ import java.util.Locale
 @Composable
 fun MutualScreen(
     viewModel: MutualViewModel,
-    navigateUp: () -> Unit = {},
     navigateToRadar: (Int, Long, MutualPassData?) -> Unit = { _, _, _ -> },
     modifier: Modifier = Modifier
 ) {
@@ -85,9 +83,7 @@ fun MutualScreen(
         topBar = { isVertical ->
             TopBar(
                 isVerticalLayout = isVertical,
-                startAction = {
-                    IconCard(action = navigateUp, resId = R.drawable.ic_back)
-                },
+                startAction = {},
                 topInfo = {
                     Text(
                         text = stringResource(R.string.mutual_title),

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

@@ -84,19 +84,23 @@ import java.util.Locale
 import java.util.TimeZone
 
 @Composable
-fun PassesDestination(navigateToRadar: (Int, Long) -> Unit) {
+fun PassesDestination(
+    navigateToRadar: (Int, Long) -> Unit,
+    navigateToMap: () -> Unit
+) {
     val context = LocalContext.current
     val container = (context.applicationContext as IContainerProvider).getMainContainer()
     val viewModel: PassesViewModel = viewModel(factory = PassesViewModel.factory(container))
     val uiState = viewModel.uiState.collectAsStateWithLifecycle().value
-    PassesScreen(uiState, viewModel::onAction, navigateToRadar)
+    PassesScreen(uiState, viewModel::onAction, navigateToRadar, navigateToMap)
 }
 
 @Composable
 private fun PassesScreen(
     uiState: PassesState,
     onAction: (PassesAction) -> Unit,
-    navigateToRadar: (Int, Long) -> Unit
+    navigateToRadar: (Int, Long) -> Unit,
+    navigateToMap: () -> Unit
 ) {
     if (uiState.isPassesDialogShown) {
         PassesFilterDialog(
@@ -163,7 +167,7 @@ private fun PassesScreen(
                     NextPassRow(pass = uiState.nextPass, isUtc = uiState.isUtc)
                 },
                 endAction = {
-                    IconCard(action = { onAction(PassesAction.ToggleRadiosDialog) }, resId = R.drawable.ic_radios)
+                    IconCard(action = navigateToMap, resId = R.drawable.ic_map)
                 }
             )
         }

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

@@ -23,6 +23,7 @@ import androidx.lifecycle.viewmodel.initializer
 import androidx.lifecycle.viewmodel.viewModelFactory
 import com.rtbishop.look4sat.core.domain.model.PassesSettings
 import com.rtbishop.look4sat.core.domain.predict.CelestialComputer
+import com.rtbishop.look4sat.core.domain.predict.GeoPos
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPass
 import com.rtbishop.look4sat.core.domain.repository.IMainContainer
 import com.rtbishop.look4sat.core.domain.repository.ISatelliteRepo
@@ -167,6 +168,7 @@ class PassesViewModel(
     // CelestialComputer.findSunRiseSet() returns the next rise/set after the supplied time, so pass
     // the calendar day's 00:00 in the same timezone used by the visible date group. Passing a pass's
     // AOS time can jump to the following day's sunrise/sunset when that AOS is after the local event.
+    // For white nights / polar day edge cases, we fall back to searching from the previous day.
     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()
@@ -175,7 +177,7 @@ class PassesViewModel(
         val result = LinkedHashMap<String, Pair<String, String>>()
         // DeepSpace group always shows today's sun times
         if (passes.any { it.isDeepSpace }) {
-            val riseSet = CelestialComputer.findSunRiseSet(stationPos, startOfDayMillis(System.currentTimeMillis(), tz))
+            val riseSet = findTodaySunRiseSet(stationPos, startOfDayMillis(System.currentTimeMillis(), tz))
             val rise = if (riseSet.riseTimeMillis > 0) sdfTime.format(Date(riseSet.riseTimeMillis)) else "--:--"
             val set = if (riseSet.setTimeMillis > 0) sdfTime.format(Date(riseSet.setTimeMillis)) else "--:--"
             result["DeepSpace (period >225min)"] = rise to set
@@ -184,7 +186,7 @@ class PassesViewModel(
             if (pass.isDeepSpace) continue
             val label = sdfDate.format(Date(pass.aosTime))
             if (label in result) continue
-            val riseSet = CelestialComputer.findSunRiseSet(stationPos, startOfDayMillis(pass.aosTime, tz))
+            val riseSet = findTodaySunRiseSet(stationPos, startOfDayMillis(pass.aosTime, tz))
             val rise = if (riseSet.riseTimeMillis > 0) sdfTime.format(Date(riseSet.riseTimeMillis)) else "--:--"
             val set = if (riseSet.setTimeMillis > 0) sdfTime.format(Date(riseSet.setTimeMillis)) else "--:--"
             result[label] = rise to set
@@ -192,6 +194,33 @@ class PassesViewModel(
         return result
     }
 
+    /**
+     * Find today's sunrise and sunset by starting from local midnight.
+     * Handles the white nights / polar day edge case where the sun is still above
+     * the -0.8333° threshold at midnight: in that case we search from the previous
+     * day's midnight to find a valid sunrise/sunset pair within the target day.
+     */
+    private fun findTodaySunRiseSet(observer: GeoPos, localMidnightMillis: Long): CelestialComputer.RiseSetTimes {
+        val threshold = 0.8333
+        val sunPos = CelestialComputer.getSunPosition(observer, localMidnightMillis)
+        if (sunPos.elevation > -threshold) {
+            // White nights / polar day: the sun is too high at midnight.
+            // Search from earlier days so the algorithm goes through a full
+            // sunset → sunrise → sunset cycle, landing in the target day.
+            val dayEnd = localMidnightMillis + 86400000L
+            for (offset in 1..3) {
+                val result = CelestialComputer.findSunRiseSet(observer, localMidnightMillis - offset * 86400000L)
+                if (result.riseTimeMillis in localMidnightMillis..dayEnd &&
+                    result.setTimeMillis in localMidnightMillis..dayEnd) {
+                    return result
+                }
+            }
+            // No valid pair found (midnight sun / polar day)
+            return CelestialComputer.RiseSetTimes(0L, 0L)
+        }
+        return CelestialComputer.findSunRiseSet(observer, localMidnightMillis)
+    }
+
     private fun startOfDayMillis(timeMillis: Long, tz: TimeZone): Long {
         return Calendar.getInstance(tz, Locale.getDefault()).apply {
             timeInMillis = timeMillis

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

@@ -249,6 +249,7 @@ private fun PagerCard(
                         selectedUuid = uiState.transceivers.selectedUuid,
                         orbitalPos = uiState.orbitalPos,
                         cw = uiState.cw,
+                        calculatorOffsetKHz = uiState.calculatorOffsetKHz,
                         onAction = onAction,
                         requestMicPermission = requestMicPermission
                     )

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

@@ -69,7 +69,8 @@ data class RadarState(
     val mutualEndTime: Long = 0L,
     val mutualMaxElev: Double = 10.0,
     val mutualLabelA: String = "你",
-    val mutualLabelB: String = "友台"
+    val mutualLabelB: String = "友台",
+    val calculatorOffsetKHz: String = ""
 )
 
 enum class SstvStatus { Idle, Recording }
@@ -124,4 +125,7 @@ sealed interface RadarAction {
     data class CwSetToneFreq(val freq: Float) : RadarAction
     data class CwToggleExpanded(val expanded: Boolean) : RadarAction
     data class CwPermissionResult(val granted: Boolean) : RadarAction
+
+    // Calculator actions
+    data class ChangeCalculatorOffset(val offsetKHz: String) : RadarAction
 }

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

@@ -151,7 +151,13 @@ class RadarViewModel(
         transponders = allRadios.filter { it.downlinkLow != null }
         if (allRadios.isNotEmpty()) {
             val firstUuid = allRadios.first().uuid
-            _uiState.update { it.copy(transceivers = it.transceivers.copy(selectedUuid = firstUuid)) }
+            val offsetKHz = allRadios.first().catnum?.let { settingsRepo.getSatelliteOffset(it) } ?: ""
+            _uiState.update {
+                it.copy(
+                    transceivers = it.transceivers.copy(selectedUuid = firstUuid),
+                    calculatorOffsetKHz = offsetKHz
+                )
+            }
             transponders.find { it.uuid == firstUuid }?.let { trackingService.setTransponder(it) }
         }
         if (!pass.isDeepSpace) {
@@ -228,7 +234,16 @@ 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)) }
+                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) {
@@ -296,6 +311,15 @@ class RadarViewModel(
             is RadarAction.CwToggleExpanded -> {
                 _uiState.update { it.copy(cw = it.cw.copy(isExpanded = action.expanded)) }
             }
+            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) }
+            }
         }
     }
 

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

@@ -26,6 +26,8 @@ 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.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.text.BasicTextField
@@ -66,6 +68,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -89,7 +92,6 @@ import androidx.constraintlayout.widget.ConstraintLayout
 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
@@ -142,6 +144,7 @@ fun CalculatorPage(
     selectedUuid: String?,
     orbitalPos: OrbitalPos?,
     cw: CwSubState,
+    calculatorOffsetKHz: String = "",
     onAction: (RadarAction) -> Unit,
     requestMicPermission: () -> Unit = {},
     modifier: Modifier = Modifier
@@ -160,59 +163,55 @@ fun CalculatorPage(
         return
     }
 
-    LazyColumn(
-        modifier = modifier.fillMaxSize(),
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState()),
         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
-                                )
-                            }
-                        )
-                    }
+            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,
-                modifier = Modifier.fillMaxWidth()
-            )
-        }
+        DopplerFrequencyCalculator(
+            transponder = selectedTransceiver,
+            orbitalPos = orbitalPos,
+            offsetKHz = calculatorOffsetKHz,
+            onOffsetChange = { onAction(RadarAction.ChangeCalculatorOffset(it)) },
+            modifier = Modifier.fillMaxWidth()
+        )
 
-        item {
-            HorizontalDivider(
-                thickness = 1.dp,
-                color = MaterialTheme.colorScheme.outline.copy(alpha = 0.3f)
-            )
-        }
+        HorizontalDivider(
+            thickness = 1.dp,
+            color = MaterialTheme.colorScheme.outline.copy(alpha = 0.3f)
+        )
 
-        item {
-            CwDecoderPanel(
-                cw = cw,
-                onAction = onAction,
-                requestMicPermission = requestMicPermission,
-                modifier = Modifier.fillMaxWidth()
-            )
-        }
+        CwDecoderPanel(
+            cw = cw,
+            onAction = onAction,
+            requestMicPermission = requestMicPermission,
+            modifier = Modifier.fillMaxWidth()
+        )
     }
 }
 
@@ -551,15 +550,16 @@ private enum class EditedField { TX, PASSBAND, RX }
 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 offsetKHz by remember { mutableStateOf("") }
+    var lastEditedField by rememberSaveable(transponder.uuid) { mutableStateOf(EditedField.TX) }
+    var txFrequencyHz by rememberSaveable(transponder.uuid) { mutableStateOf(0L) }
+    var rxFrequencyHz by rememberSaveable(transponder.uuid) { mutableStateOf(0L) }
+    var passbandPosition by rememberSaveable(transponder.uuid) { mutableStateOf(0.5f) }
     var stepSizeKHz by remember { mutableIntStateOf(1) }
 
     val offsetHz = offsetKHz.toDoubleOrNull()?.let { it * 1000 }?.toLong() ?: 0L
@@ -649,12 +649,15 @@ private fun DopplerFrequencyCalculator(
     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)
+                // Passband 模式：从 RX 经完整往返路径（含多普勒补偿）反推 TX 位置
+                val txFromRx = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
+                    newRxHz, rawTransponder, orbitalPos, offsetHz
+                )
                 passbandPosition = if (txFromRx != null) {
-                    ((txFromRx - rawTxLow).toFloat() / rawTxRange).coerceIn(0f, 1f)
-                } else pos
+                    ((txFromRx - txLow).toFloat() / txRange).coerceIn(0f, 1f)
+                } else {
+                    ((rxFrequencyHz - rxLow).toFloat() / rxRange).coerceIn(0f, 1f)
+                }
                 txFrequencyHz = txLow + (passbandPosition * txRange).toLong()
                 rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
                     txFrequencyHz, rawTransponder, orbitalPos, offsetHz
@@ -742,7 +745,7 @@ private fun DopplerFrequencyCalculator(
                 ) {
                     BasicTextField(
                         value = offsetKHz,
-                        onValueChange = { offsetKHz = it },
+                        onValueChange = onOffsetChange,
                         singleLine = true,
                         textStyle = TextStyle(
                             fontSize = 16.sp,

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

@@ -52,6 +52,21 @@ 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 androidx.compose.animation.core.spring
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListScope
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.mutableLongStateOf
+import androidx.compose.runtime.toMutableStateList
+import androidx.compose.ui.draw.rotate
+import androidx.compose.ui.res.painterResource
+import com.rtbishop.look4sat.core.domain.model.Constants
+import com.rtbishop.look4sat.core.presentation.IconCard
 
 @Preview(showBackground = true)
 @Composable
@@ -116,128 +131,150 @@ 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) }
+    // Stable Long IDs avoid key collisions when several entries are empty or duplicated.
+    val nextId = remember { mutableLongStateOf((satelliteUrls.size + transceiversUrls.size).toLong()) }
+    val satUrls = remember {
+        satelliteUrls.mapIndexed { i, url -> i.toLong() to url }.toMutableStateList()
+    }
+    val txUrls = remember {
+        transceiversUrls.mapIndexed { i, url -> (satelliteUrls.size + i).toLong() to url }.toMutableStateList()
+    }
     val onAccept = {
-        onSave(isEnabledCustomTle.value, isEnabledCustomTransceivers.value, urlTle.value, urlTransceivers.value)
+        onSave(
+            satUrls.map { it.second.trim() }.filter { it.isNotBlank() },
+            txUrls.map { it.second.trim() }.filter { it.isNotBlank() }
+        )
         onDismiss()
     }
-    val onCancel = { onDismiss() }
     SharedDialog(
         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",
+                labelResId = R.string.prefs_data_sources_satellites_label,
+                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",
+                labelResId = R.string.prefs_data_sources_transceivers_label,
+                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,
+    labelResId: Int,
+    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 = stringResource(labelResId),
+                fontWeight = FontWeight.Medium,
+                color = MaterialTheme.colorScheme.primary,
+                modifier = Modifier.weight(1f)
+            )
+            IconCard(action = onAdd, resId = R.drawable.ic_add)
+        }
+    }
+    itemsIndexed(urls, key = { _, entry -> "$sectionKey-${entry.first}" }) { index, (_, url) ->
+        val enabledTint = MaterialTheme.colorScheme.onSurfaceVariant
+        OutlinedTextField(
+            value = url,
+            onValueChange = { onUrlChange(index, it) },
+            label = { Text(stringResource(R.string.prefs_data_sources_url_title)) },
+            leadingIcon = {
+                IconButton(onClick = { onMoveUp(index) }, enabled = index > 0) {
+                    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() {
@@ -252,6 +289,7 @@ fun PreviewNetworkOutputDialog() {
                 frequencyAddress = "127.0.0.1",
                 frequencyPort = "4532",
                 frequencyFormat = $$"F $FREQ",
+                frequencyOffsetHz = 0L,
                 bluetoothRotatorState = false,
                 bluetoothRotatorFormat = $$"P $AZ $EL",
                 bluetoothRotatorName = "Default",
@@ -261,7 +299,7 @@ fun PreviewNetworkOutputDialog() {
                 bluetoothFrequencyFormat = $$"F $FREQ"
             ),
             onDismiss = {},
-            onSave = { _, _, _, _, _, _, _, _ -> }
+            onSave = { _, _, _, _, _, _, _, _, _ -> }
         )
     }
 }
@@ -272,7 +310,7 @@ fun NetworkOutputDialog(
     onDismiss: () -> Unit,
     onSave: (
         Boolean, String, String, String,
-        Boolean, String, String, String
+        Boolean, String, String, String, Long
     ) -> Unit
 ) {
     val padding = LocalSpacing.current.large
@@ -286,12 +324,15 @@ 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()
     }
@@ -324,6 +365,24 @@ 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))
         }
     }
@@ -352,6 +411,7 @@ fun PreviewBluetoothOutputDialog() {
                 frequencyAddress = "127.0.0.1",
                 frequencyPort = "4532",
                 frequencyFormat = $$"F $FREQ",
+                frequencyOffsetHz = 0L,
                 bluetoothRotatorState = false,
                 bluetoothRotatorFormat = $$"P $AZ $EL",
                 bluetoothRotatorName = "Default",

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

@@ -61,6 +61,7 @@ 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
@@ -125,30 +126,15 @@ 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 +142,15 @@ 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
                         )
                     )
                 )

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

@@ -1,40 +1,38 @@
 package com.rtbishop.look4sat.feature.status
 
-import androidx.compose.animation.core.RepeatMode
-import androidx.compose.animation.core.animateFloat
-import androidx.compose.animation.core.infiniteRepeatable
-import androidx.compose.animation.core.rememberInfiniteTransition
-import androidx.compose.animation.core.tween
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
-import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.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.PaddingValues
-import androidx.compose.foundation.layout.navigationBarsPadding
-import androidx.compose.foundation.layout.statusBarsPadding
+import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
-import androidx.compose.ui.graphics.ColorFilter
-import androidx.compose.ui.res.painterResource
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Button
 import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.FilterChipDefaults
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -42,23 +40,52 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
-import androidx.compose.ui.draw.rotate
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.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.Lifecycle
+import androidx.lifecycle.LifecycleEventObserver
+import androidx.lifecycle.compose.LocalLifecycleOwner
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.rtbishop.look4sat.core.domain.model.SatDay
 import com.rtbishop.look4sat.core.domain.model.SatReport
 import com.rtbishop.look4sat.core.domain.model.SatSlot
 import com.rtbishop.look4sat.core.domain.model.SatStatus
-import com.rtbishop.look4sat.core.domain.repository.IMainContainer
+import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
+import com.rtbishop.look4sat.core.presentation.CardButton
+import com.rtbishop.look4sat.core.presentation.InfoDialog
 import com.rtbishop.look4sat.core.presentation.R
-import com.rtbishop.look4sat.feature.status.R as StatusR
+import com.rtbishop.look4sat.core.presentation.layoutPadding
+import java.text.SimpleDateFormat
 import java.util.Calendar
+import java.util.Date
+import java.util.Locale
+import java.util.TimeZone
+
+/** Fixed width per day tile — tablet-safe; name column absorbs remaining space. */
+private val TILE_WIDTH: Dp = 64.dp
+
+private data class UploadOption(
+    val apiValue: String,
+    val labelResId: Int,
+    val color: Color
+)
+
+private val UPLOAD_OPTIONS = listOf(
+    UploadOption(AMSAT_REPORT_HEARD, R.string.amsat_upload_active, Color(0xFF648FFF)),
+    UploadOption(AMSAT_REPORT_TELEMETRY_ONLY, R.string.amsat_upload_tlm, Color(0xFFFFB000)),
+    UploadOption(AMSAT_REPORT_NOT_HEARD, R.string.amsat_upload_not_heard, Color(0xFFDC267F)),
+    UploadOption(AMSAT_REPORT_CREW_ACTIVE, R.string.amsat_upload_crew_active, Color(0xFFFE6100))
+)
 
 /**
  * Map AMSAT status text to Material3 colorScheme colors.
@@ -68,37 +95,67 @@ import java.util.Calendar
 private fun statusColorOf(statusText: String): Color {
     return when {
         statusText.contains("Heard", ignoreCase = true) && !statusText.contains("Not", ignoreCase = true) ->
-            MaterialTheme.colorScheme.tertiary // Active
+            MaterialTheme.colorScheme.tertiary
         statusText.contains("Telemetry", ignoreCase = true) || statusText.contains("Beacon", ignoreCase = true) ->
-            MaterialTheme.colorScheme.tertiaryContainer // Telemetry
+            MaterialTheme.colorScheme.tertiaryContainer
         statusText.contains("Not Heard", ignoreCase = true) ->
-            Color(0xFFDC267F) // NotHeard pink (no semantic slot)
+            Color(0xFFDC267F)
         else ->
-            MaterialTheme.colorScheme.error // Conflict
+            MaterialTheme.colorScheme.error
     }
 }
 
-private val NoReportGray = Color(0xFFC0C0C0) // Neutral state
+@Composable
+fun SatStatusDestination() {
+    val context = LocalContext.current
+    val container = (context.applicationContext as IContainerProvider).getMainContainer()
+    val viewModel: SatStatusViewModel = viewModel(factory = SatStatusViewModel.factory(container))
+    val lifecycleOwner = LocalLifecycleOwner.current
+    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+    DisposableEffect(lifecycleOwner, viewModel) {
+        var skipInitialStart = true
+        val observer = LifecycleEventObserver { _, event ->
+            if (event == Lifecycle.Event.ON_START) {
+                if (skipInitialStart) {
+                    skipInitialStart = false
+                } else {
+                    viewModel.fetch()
+                }
+            }
+        }
+        lifecycleOwner.lifecycle.addObserver(observer)
+        onDispose { lifecycleOwner.lifecycle.removeObserver(observer) }
+    }
+    SatStatusScreen(
+        uiState = uiState,
+        refresh = viewModel::refresh,
+        onToggleUpload = viewModel::toggleUploadPanel,
+        onUploadReportChange = viewModel::setUploadReport,
+        onUploadCallsignChange = viewModel::setUploadCallsign,
+        onUploadGridChange = viewModel::setUploadGrid,
+        onRequestSubmitUpload = viewModel::requestSubmitConfirmation,
+        onConfirmSubmitUpload = viewModel::confirmSubmitReport,
+        onDismissSubmitConfirmation = viewModel::dismissSubmitConfirmation,
+        onDismissUpload = viewModel::collapseUploadPanel
+    )
+}
 
 @Composable
-fun SatStatusScreen(container: IMainContainer) {
-    val viewModel: SatStatusViewModel = viewModel(factory = SatStatusViewModel.factory(container))
-    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+private fun SatStatusScreen(
+    uiState: SatStatusUiState,
+    refresh: () -> Unit,
+    onToggleUpload: () -> Unit,
+    onUploadReportChange: (String) -> Unit,
+    onUploadCallsignChange: (String) -> Unit,
+    onUploadGridChange: (String) -> Unit,
+    onRequestSubmitUpload: () -> Unit,
+    onConfirmSubmitUpload: (String) -> Unit,
+    onDismissSubmitConfirmation: () -> Unit,
+    onDismissUpload: () -> Unit
+) {
     var selectedDay by remember { mutableStateOf<Pair<SatStatus, SatDay>?>(null) }
-
-    Column(
-        modifier = Modifier
-            .fillMaxSize()
-            .statusBarsPadding()
-            .navigationBarsPadding()
-            .padding(horizontal = 8.dp)
-    ) {
-        // Top: legend + refresh
-        StatusHeader(
-            fetchedAtUtcMs = uiState.fetchedAtUtcMs,
-            isRefreshing = uiState.isRefreshing,
-            onRefresh = { viewModel.refresh() }
-        )
+    Column(modifier = Modifier.fillMaxSize().layoutPadding()) {
+        StatusHeader(fetchedAtUtcMs = uiState.fetchedAtUtcMs, isRefreshing = uiState.isRefreshing, onRefresh = refresh)
         LegendRow()
 
         when {
@@ -113,29 +170,16 @@ fun SatStatusScreen(container: IMainContainer) {
                     verticalArrangement = Arrangement.Center,
                     horizontalAlignment = Alignment.CenterHorizontally
                 ) {
-                    Text(
-                        text = stringResource(id = R.string.amsat_load_failed),
-                        color = MaterialTheme.colorScheme.error
-                    )
-                    TextButton(onClick = { viewModel.refresh() }) {
-                        Text(text = stringResource(id = R.string.amsat_retry))
-                    }
+                    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 -> {
-                // Header
                 HeaderRow(statuses = uiState.statuses)
                 HorizontalDivider(thickness = 1.dp)
-                // Row
-                LazyColumn(
-                    modifier = Modifier.fillMaxSize(),
-                    contentPadding = PaddingValues(bottom = 16.dp)
-                ) {
+                LazyColumn(modifier = Modifier.fillMaxSize()) {
                     items(uiState.statuses, key = { it.name }) { status ->
-                        StatusRow(
-                            status = status,
-                            onClickDay = { day -> selectedDay = status to day }
-                        )
+                        StatusRow(status = status, onClickDay = { day -> selectedDay = status to day })
                     }
                 }
             }
@@ -147,52 +191,53 @@ fun SatStatusScreen(container: IMainContainer) {
             statusName = status.name,
             day = day,
             reports = uiState.reports,
-            onDismiss = { selectedDay = null }
+            upload = uiState.upload,
+            onToggleUpload = onToggleUpload,
+            onReportChange = onUploadReportChange,
+            onCallsignChange = onUploadCallsignChange,
+            onGridChange = onUploadGridChange,
+            onRequestSubmitReport = onRequestSubmitUpload,
+            onConfirmSubmitReport = { onConfirmSubmitUpload(status.name) },
+            onDismissSubmitConfirmation = onDismissSubmitConfirmation,
+            onDismiss = {
+                selectedDay = null
+                onDismissUpload()
+            }
         )
     }
 }
 
 /** Top: update time + refresh button (spinner while loading) */
 @Composable
-private fun StatusHeader(
-    fetchedAtUtcMs: Long,
-    isRefreshing: Boolean,
-    onRefresh: () -> Unit
-) {
-    val infiniteTransition = rememberInfiniteTransition(label = "refresh")
-    val angle by infiniteTransition.animateFloat(
-        initialValue = 0f,
-        targetValue = 360f,
-        animationSpec = infiniteRepeatable(tween(800), RepeatMode.Restart),
-        label = "angle"
-    )
+private fun StatusHeader(fetchedAtUtcMs: Long, isRefreshing: Boolean, onRefresh: () -> Unit) {
     Row(
-        modifier = Modifier.fillMaxWidth().padding(vertical = 6.dp),
+        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 = 13.sp,
+            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(34.dp)
+                .size(32.dp)
                 .clip(CircleShape)
                 .background(MaterialTheme.colorScheme.surfaceVariant)
                 .clickable(onClick = onRefresh),
             contentAlignment = Alignment.Center
         ) {
             if (isRefreshing) {
-                CircularProgressIndicator(modifier = Modifier.size(18.dp), strokeWidth = 2.dp)
+                CircularProgressIndicator(modifier = Modifier.size(16.dp), strokeWidth = 2.dp)
             } else {
                 Image(
-                    painter = painterResource(id = StatusR.drawable.ic_refresh),
+                    painter = painterResource(id = R.drawable.ic_refresh),
                     contentDescription = stringResource(id = R.string.amsat_refresh),
-                    modifier = Modifier
-                        .size(18.dp)
-                        .rotate(angle),
+                    modifier = Modifier.size(16.dp),
                     colorFilter = ColorFilter.tint(MaterialTheme.colorScheme.primary)
                 )
             }
@@ -200,171 +245,380 @@ private fun StatusHeader(
     }
 }
 
-/** Legend (official four colors) */
+/** 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 MaterialTheme.colorScheme.tertiary,
-        stringResource(id = R.string.amsat_tlm) to MaterialTheme.colorScheme.tertiaryContainer,
+        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 MaterialTheme.colorScheme.error
+        stringResource(id = R.string.amsat_conflict) to Color(0xFFFE6100)
     )
-    Row(
-        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
-        horizontalArrangement = Arrangement.spacedBy(8.dp)
+    FlowRow(
+        modifier = Modifier.fillMaxWidth().padding(bottom = 6.dp),
+        horizontalArrangement = Arrangement.spacedBy(6.dp),
+        verticalArrangement = Arrangement.spacedBy(6.dp)
     ) {
         legend.forEach { (label, color) ->
-            Row(verticalAlignment = Alignment.CenterVertically) {
+            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(10.dp)
-                        .clip(RoundedCornerShape(2.dp))
+                        .size(8.dp)
+                        .clip(RoundedCornerShape(4.dp))
                         .background(color)
                 )
-                Spacer(modifier = Modifier.width(3.dp))
-                Text(text = label, fontSize = 10.sp, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                Spacer(modifier = Modifier.width(6.dp))
+                Text(
+                    text = label,
+                    fontSize = 14.sp,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
             }
         }
     }
 }
 
-/** Header: satellite name + 6 day dates */
+/** 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 = 4.dp),
+        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
         verticalAlignment = Alignment.CenterVertically
     ) {
         Text(
             text = stringResource(id = R.string.amsat_name),
-            fontSize = 11.sp,
-            fontWeight = FontWeight.Bold,
+            fontSize = 12.sp,
+            fontWeight = FontWeight.Medium,
             color = MaterialTheme.colorScheme.primary,
-            modifier = Modifier.weight(2f).padding(start = 4.dp)
+            modifier = Modifier.weight(1f).padding(start = 4.dp)
         )
         dates.forEach { date ->
             Text(
                 text = date,
-                fontSize = 10.sp,
-                fontWeight = FontWeight.Bold,
+                fontSize = 12.sp,
+                fontWeight = FontWeight.Medium,
                 textAlign = TextAlign.Center,
                 color = MaterialTheme.colorScheme.primary,
-                modifier = Modifier.weight(0.8f)
+                modifier = Modifier.width(TILE_WIDTH)
             )
         }
     }
 }
 
-/** Satellite row: name + 6 day color blocks (displays the newest non-gray status) */
+/** 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 = 3.dp),
+        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
         verticalAlignment = Alignment.CenterVertically
     ) {
         Text(
             text = status.name,
-            fontSize = 11.sp,
+            fontSize = 14.sp,
             maxLines = 1,
-            overflow = androidx.compose.ui.text.style.TextOverflow.Ellipsis,
-            modifier = Modifier.weight(2f).padding(start = 4.dp)
+            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.weight(0.8f).padding(horizontal = 1.dp),
+                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 */
+/** Day block: newest reported status among the day's 12 slots; gray when none. */
 @Composable
 private fun DayCell(slot: SatSlot, modifier: Modifier, onClick: () -> Unit) {
     val color = Color(slot.statusColor)
     Box(
         modifier = modifier
-            .height(24.dp)
+            .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 = 11.sp,
-                fontWeight = FontWeight.Bold,
-                color = Color.White
-            )
+            Text(text = slot.count.toString(), fontSize = 13.sp, fontWeight = FontWeight.Bold, color = Color.White)
         }
     }
 }
 
-/** Report detail dialog (3 levels: callsign/date/time/grid) */
+/** Report detail dialog (callsign / date / time / grid) */
 @Composable
 private fun ReportDialog(
     statusName: String,
     day: SatDay,
     reports: Map<String, SatReport>,
+    upload: AmSatUploadUiState,
+    onToggleUpload: () -> Unit,
+    onReportChange: (String) -> Unit,
+    onCallsignChange: (String) -> Unit,
+    onGridChange: (String) -> Unit,
+    onRequestSubmitReport: () -> Unit,
+    onConfirmSubmitReport: () -> Unit,
+    onDismissSubmitConfirmation: () -> Unit,
     onDismiss: () -> Unit
 ) {
-    val dayReports = day.slots.flatMap { it.reportIds }
-        .mapNotNull { reports[it] }
-    AlertDialog(
-        onDismissRequest = onDismiss,
-        title = { Text(text = "$statusName · ${day.dateLabel}") },
-        text = {
-            if (dayReports.isEmpty()) {
-                Text(stringResource(id = R.string.amsat_no_reports))
-            } else {
-                LazyColumn(modifier = Modifier.height(320.dp)) {
-                    items(dayReports) { report ->
-                        Column(modifier = Modifier.fillMaxWidth().padding(vertical = 4.dp)) {
-                            Row(verticalAlignment = Alignment.CenterVertically) {
-                                Box(
-                                    modifier = Modifier
-                                        .size(8.dp)
-                                        .clip(CircleShape)
-                                        .background(statusColorOf(report.statusText))
-                                )
-                                Spacer(modifier = Modifier.width(6.dp))
-                                Text(
-                                    text = report.statusText,
-                                    fontSize = 13.sp,
-                                    fontWeight = FontWeight.Bold
-                                )
-                            }
-                            Text(
-                                text = "${report.call}  ${report.dateUtc}  ${report.timeUtc}" +
-                                    if (report.grid.isNotBlank() && report.grid != "-") "  ${report.grid}" else "",
-                                fontSize = 12.sp,
-                                color = MaterialTheme.colorScheme.onSurfaceVariant
+    val dayReports = day.slots.flatMap { it.reportIds }.mapNotNull { reports[it] }
+    InfoDialog(
+        title = "$statusName · ${day.dateLabel}",
+        onDismiss = onDismiss,
+        onAccept = onDismiss,
+        extraAction = {
+            CardButton(
+                onClick = onToggleUpload,
+                text = stringResource(if (upload.isExpanded) R.string.amsat_upload_back else R.string.amsat_upload)
+            )
+        }
+    ) {
+        AnimatedVisibility(visible = upload.isExpanded) {
+            AmSatUploadPanel(
+                statusName = statusName,
+                upload = upload,
+                onReportChange = onReportChange,
+                onCallsignChange = onCallsignChange,
+                onGridChange = onGridChange,
+                onRequestSubmitReport = onRequestSubmitReport
+            )
+        }
+        if (upload.isConfirmingSubmit) {
+            AmSatUploadConfirmDialog(
+                statusName = statusName,
+                upload = upload,
+                onConfirm = onConfirmSubmitReport,
+                onDismiss = onDismissSubmitConfirmation
+            )
+        }
+        if (dayReports.isEmpty()) {
+            Text(
+                text = stringResource(id = R.string.amsat_no_reports),
+                modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp)
+            )
+            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)
                         }
-                        HorizontalDivider(thickness = 0.5.dp)
+                        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)
                 }
             }
+        }
+    }
+}
+
+@Composable
+private fun AmSatUploadPanel(
+    statusName: String,
+    upload: AmSatUploadUiState,
+    onReportChange: (String) -> Unit,
+    onCallsignChange: (String) -> Unit,
+    onGridChange: (String) -> Unit,
+    onRequestSubmitReport: () -> Unit
+) {
+    val options = remember(statusName) {
+        if (statusName.startsWith("ISS")) UPLOAD_OPTIONS else UPLOAD_OPTIONS.filter { it.apiValue != AMSAT_REPORT_CREW_ACTIVE }
+    }
+    Column(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(horizontal = 16.dp, vertical = 8.dp)
+            .clip(RoundedCornerShape(16.dp))
+            .background(MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.45f))
+            .padding(12.dp),
+        verticalArrangement = Arrangement.spacedBy(10.dp)
+    ) {
+        Text(
+            text = stringResource(R.string.amsat_upload_report),
+            fontSize = 16.sp,
+            fontWeight = FontWeight.Medium,
+            color = MaterialTheme.colorScheme.primary
+        )
+        Text(
+            text = stringResource(R.string.amsat_upload_time_now, formatUtcNowForUpload(System.currentTimeMillis())),
+            fontSize = 12.sp,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+        Text(
+            text = stringResource(R.string.amsat_upload_status),
+            fontSize = 12.sp,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+        FlowRow(
+            horizontalArrangement = Arrangement.spacedBy(6.dp),
+            verticalArrangement = Arrangement.spacedBy(4.dp)
+        ) {
+            options.forEach { option ->
+                val selected = upload.selectedReport == option.apiValue
+                FilterChip(
+                    selected = selected,
+                    onClick = { onReportChange(option.apiValue) },
+                    label = {
+                        Row(verticalAlignment = Alignment.CenterVertically) {
+                            Box(
+                                modifier = Modifier
+                                    .size(8.dp)
+                                    .clip(CircleShape)
+                                    .background(if (selected) Color.White else option.color)
+                            )
+                            Spacer(modifier = Modifier.width(6.dp))
+                            Text(stringResource(option.labelResId), maxLines = 1)
+                        }
+                    },
+                    colors = FilterChipDefaults.filterChipColors(
+                        containerColor = option.color.copy(alpha = 0.10f),
+                        labelColor = MaterialTheme.colorScheme.onSurface,
+                        selectedContainerColor = option.color,
+                        selectedLabelColor = Color.White
+                    ),
+                    border = FilterChipDefaults.filterChipBorder(
+                        enabled = true,
+                        selected = selected,
+                        borderColor = option.color.copy(alpha = 0.60f),
+                        selectedBorderColor = option.color
+                    )
+                )
+            }
+        }
+        Row(horizontalArrangement = Arrangement.spacedBy(8.dp), modifier = Modifier.fillMaxWidth()) {
+            OutlinedTextField(
+                value = upload.callsign,
+                onValueChange = onCallsignChange,
+                label = { Text(stringResource(R.string.amsat_upload_callsign)) },
+                singleLine = true,
+                modifier = Modifier.weight(1f)
+            )
+            OutlinedTextField(
+                value = upload.gridSquare,
+                onValueChange = onGridChange,
+                label = { Text(stringResource(R.string.amsat_upload_grid)) },
+                singleLine = true,
+                modifier = Modifier.weight(1f)
+            )
+        }
+        Button(
+            onClick = onRequestSubmitReport,
+            enabled = !upload.isSubmitting && upload.callsign.isNotBlank(),
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            if (upload.isSubmitting) {
+                CircularProgressIndicator(modifier = Modifier.size(16.dp), strokeWidth = 2.dp)
+            } else {
+                Text(stringResource(R.string.amsat_upload_submit))
+            }
+        }
+        upload.message?.let { message ->
+            if (message == UPLOAD_MESSAGE_SUCCESS) {
+                Text(
+                    text = stringResource(R.string.amsat_upload_success),
+                    fontSize = 12.sp,
+                    color = MaterialTheme.colorScheme.primary
+                )
+            }
+        }
+        upload.error?.let { error ->
+            Text(
+                text = uploadErrorText(error),
+                fontSize = 12.sp,
+                color = MaterialTheme.colorScheme.error
+            )
+        }
+    }
+}
+
+@Composable
+private fun AmSatUploadConfirmDialog(
+    statusName: String,
+    upload: AmSatUploadUiState,
+    onConfirm: () -> Unit,
+    onDismiss: () -> Unit
+) {
+    val option = UPLOAD_OPTIONS.firstOrNull { it.apiValue == upload.selectedReport } ?: UPLOAD_OPTIONS.first()
+    val statusLabel = stringResource(option.labelResId)
+    val grid = upload.gridSquare.ifBlank { stringResource(R.string.amsat_upload_grid_none) }
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(stringResource(R.string.amsat_upload_confirm_title)) },
+        text = {
+            Text(
+                text = stringResource(
+                    R.string.amsat_upload_confirm_message,
+                    statusName,
+                    statusLabel,
+                    upload.callsign,
+                    grid
+                )
+            )
         },
         confirmButton = {
-            TextButton(onClick = onDismiss) { Text(stringResource(id = R.string.amsat_close)) }
+            TextButton(onClick = onConfirm, enabled = !upload.isSubmitting) {
+                Text(stringResource(R.string.amsat_upload_confirm))
+            }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss, enabled = !upload.isSubmitting) {
+                Text(stringResource(R.string.btn_cancel))
+            }
         }
     )
 }
 
+@Composable
+private fun uploadErrorText(error: String): String {
+    return when (error) {
+        UPLOAD_ERROR_CALLSIGN_REQUIRED -> stringResource(R.string.amsat_upload_callsign_required)
+        UPLOAD_ERROR_GRID_INVALID -> stringResource(R.string.amsat_upload_grid_invalid)
+        else -> stringResource(R.string.amsat_upload_failed, error)
+    }
+}
+
+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
-    return "%02d-%02d %02d:%02d".format(
-        cal.get(Calendar.MONTH) + 1, cal.get(Calendar.DAY_OF_MONTH),
-        cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE)
-    )
+    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"
+}
+
+private fun formatUtcNowForUpload(utcMs: Long): String {
+    val formatter = SimpleDateFormat("yyyy-MM-dd HH:mm", Locale.US).apply {
+        timeZone = TimeZone.getTimeZone("UTC")
+    }
+    return formatter.format(Date(utcMs))
 }

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

@@ -4,13 +4,38 @@ 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.AmSatReportSubmission
 import com.rtbishop.look4sat.core.domain.model.SatReport
 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.repository.IMainContainer
+import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
+import java.util.Locale
+
+const val AMSAT_REPORT_HEARD = "Heard"
+const val AMSAT_REPORT_TELEMETRY_ONLY = "Telemetry Only"
+const val AMSAT_REPORT_NOT_HEARD = "Not Heard"
+const val AMSAT_REPORT_CREW_ACTIVE = "Crew Active"
+
+const val UPLOAD_ERROR_CALLSIGN_REQUIRED = "callsign_required"
+const val UPLOAD_ERROR_GRID_INVALID = "grid_invalid"
+const val UPLOAD_MESSAGE_SUCCESS = "success"
+
+data class AmSatUploadUiState(
+    val isExpanded: Boolean = false,
+    val selectedReport: String = AMSAT_REPORT_HEARD,
+    val callsign: String = "",
+    val gridSquare: String = "",
+    val isSubmitting: Boolean = false,
+    val isConfirmingSubmit: Boolean = false,
+    val message: String? = null,
+    val error: String? = null
+)
 
 data class SatStatusUiState(
     val isLoading: Boolean = false,
@@ -18,35 +43,34 @@ data class SatStatusUiState(
     val statuses: List<SatStatus> = emptyList(),
     val reports: Map<String, SatReport> = emptyMap(),
     val fetchedAtUtcMs: Long = 0L,
-    val error: String? = null
+    val error: String? = null,
+    val upload: AmSatUploadUiState = AmSatUploadUiState()
 )
 
 class SatStatusViewModel(
-    private val container: IMainContainer
+    private val amSatRepo: IAmSatRepository,
+    private val settingsRepo: ISettingsRepo
 ) : ViewModel() {
 
-    private val _uiState = MutableStateFlow(SatStatusUiState(isLoading = true))
+    private val cachedStatusPage = amSatRepo.getCachedStatus()
+    private val _uiState = MutableStateFlow(cachedStatusPage?.toUiState() ?: SatStatusUiState(isLoading = true))
     val uiState: StateFlow<SatStatusUiState> = _uiState
 
     init {
-        fetch()
+        if (cachedStatusPage == null) fetch()
     }
 
     fun fetch() {
+        amSatRepo.getCachedStatus()?.let { page ->
+            applyStatusPage(page)
+            return
+        }
         viewModelScope.launch {
             _uiState.update { it.copy(isLoading = true, error = null) }
             try {
-                val page = container.amSatRepo.fetchStatus()
+                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
-                        )
-                    }
+                    applyStatusPage(page)
                 } else {
                     _uiState.update {
                         it.copy(isLoading = false, isRefreshing = false, error = "fetch_failed")
@@ -65,16 +89,9 @@ class SatStatusViewModel(
         _uiState.update { it.copy(isRefreshing = true, error = null) }
         viewModelScope.launch {
             try {
-                val page = container.amSatRepo.fetchStatus()
+                val page = amSatRepo.fetchStatus(forceRefresh = true)
                 if (page != null && page.statuses.isNotEmpty()) {
-                    _uiState.update {
-                        it.copy(
-                            isRefreshing = false,
-                            statuses = page.statuses,
-                            reports = page.reports,
-                            fetchedAtUtcMs = page.fetchedAtUtcMs
-                        )
-                    }
+                    applyStatusPage(page)
                 } else {
                     _uiState.update { it.copy(isRefreshing = false, error = "fetch_failed") }
                 }
@@ -84,11 +101,194 @@ class SatStatusViewModel(
         }
     }
 
+    private fun applyStatusPage(page: SatStatusPage) {
+        _uiState.update {
+            it.copy(
+                isLoading = false,
+                isRefreshing = false,
+                statuses = page.statuses,
+                reports = page.reports,
+                fetchedAtUtcMs = page.fetchedAtUtcMs,
+                error = null
+            )
+        }
+    }
+
+    fun toggleUploadPanel() {
+        val storedCallsign = settingsRepo.getAmSatCallsign()
+        val defaultGrid = defaultGridSquare()
+        _uiState.update { state ->
+            val upload = state.upload
+            val expanded = !upload.isExpanded
+            state.copy(
+                upload = if (expanded) {
+                    upload.copy(
+                        isExpanded = true,
+                        callsign = upload.callsign.ifBlank { storedCallsign },
+                        gridSquare = upload.gridSquare.ifBlank { defaultGrid },
+                        message = null,
+                        error = null
+                    )
+                } else {
+                    upload.copy(isExpanded = false, isConfirmingSubmit = false, message = null, error = null)
+                }
+            )
+        }
+    }
+
+    fun collapseUploadPanel() {
+        _uiState.update { it.copy(upload = it.upload.copy(isExpanded = false, isConfirmingSubmit = false, message = null, error = null)) }
+    }
+
+    fun setUploadReport(report: String) {
+        _uiState.update { it.copy(upload = it.upload.copy(selectedReport = report, isConfirmingSubmit = false, message = null, error = null)) }
+    }
+
+    fun setUploadCallsign(callsign: String) {
+        val normalized = callsign.trim().uppercase(Locale.US)
+        settingsRepo.setAmSatCallsign(normalized)
+        _uiState.update { it.copy(upload = it.upload.copy(callsign = normalized, isConfirmingSubmit = false, message = null, error = null)) }
+    }
+
+    fun setUploadGrid(grid: String) {
+        val normalized = grid.trim().uppercase(Locale.US)
+        _uiState.update { it.copy(upload = it.upload.copy(gridSquare = normalized, isConfirmingSubmit = false, message = null, error = null)) }
+    }
+
+    fun requestSubmitConfirmation() {
+        val prepared = validateUpload(_uiState.value.upload) ?: return
+        _uiState.update {
+            it.copy(
+                upload = it.upload.copy(
+                    callsign = prepared.callsign,
+                    gridSquare = prepared.grid,
+                    isConfirmingSubmit = true,
+                    message = null,
+                    error = null
+                )
+            )
+        }
+    }
+
+    fun dismissSubmitConfirmation() {
+        _uiState.update { it.copy(upload = it.upload.copy(isConfirmingSubmit = false)) }
+    }
+
+    fun confirmSubmitReport(satelliteName: String) {
+        val upload = _uiState.value.upload
+        if (upload.isSubmitting) return
+        val prepared = validateUpload(upload) ?: return
+
+        settingsRepo.setAmSatCallsign(prepared.callsign)
+        _uiState.update {
+            it.copy(
+                upload = it.upload.copy(
+                    callsign = prepared.callsign,
+                    gridSquare = prepared.grid,
+                    isSubmitting = true,
+                    isConfirmingSubmit = false,
+                    error = null,
+                    message = null
+                )
+            )
+        }
+        viewModelScope.launch {
+            val result = amSatRepo.submitReport(
+                AmSatReportSubmission(
+                    name = satelliteName,
+                    report = prepared.report,
+                    callsign = prepared.callsign,
+                    gridSquare = prepared.grid,
+                    reportedAtUtcMillis = System.currentTimeMillis()
+                )
+            )
+            if (result.success) {
+                _uiState.update {
+                    it.copy(
+                        upload = it.upload.copy(
+                            isSubmitting = false,
+                            callsign = prepared.callsign,
+                            gridSquare = prepared.grid,
+                            message = UPLOAD_MESSAGE_SUCCESS,
+                            error = null
+                        )
+                    )
+                }
+                refresh()
+            } else {
+                _uiState.update {
+                    it.copy(
+                        upload = it.upload.copy(
+                            isSubmitting = false,
+                            message = null,
+                            error = result.message.ifBlank { "Upload failed" }
+                        )
+                    )
+                }
+            }
+        }
+    }
+
+    private fun validateUpload(upload: AmSatUploadUiState): PreparedUpload? {
+        val callsign = upload.callsign.trim().uppercase(Locale.US)
+        val grid = upload.gridSquare.trim().uppercase(Locale.US)
+        return when {
+            callsign.isBlank() -> {
+                _uiState.update {
+                    it.copy(
+                        upload = it.upload.copy(
+                            isConfirmingSubmit = false,
+                            error = UPLOAD_ERROR_CALLSIGN_REQUIRED,
+                            message = null
+                        )
+                    )
+                }
+                null
+            }
+            grid.isNotBlank() && !MAIDENHEAD_GRID.matches(grid) -> {
+                _uiState.update {
+                    it.copy(
+                        upload = it.upload.copy(
+                            isConfirmingSubmit = false,
+                            error = UPLOAD_ERROR_GRID_INVALID,
+                            message = null
+                        )
+                    )
+                }
+                null
+            }
+            else -> PreparedUpload(
+                report = upload.selectedReport,
+                callsign = callsign,
+                grid = grid
+            )
+        }
+    }
+
+    private fun defaultGridSquare(): String {
+        val grid = settingsRepo.stationPosition.value.qthLocator.trim().uppercase(Locale.US)
+        return grid.takeUnless { it == "JJ00AA" }.orEmpty()
+    }
+
     companion object {
         fun factory(container: IMainContainer) = viewModelFactory {
             initializer {
-                SatStatusViewModel(container)
+                SatStatusViewModel(container.amSatRepo, container.settingsRepo)
             }
         }
     }
 }
+
+private fun SatStatusPage.toUiState() = SatStatusUiState(
+    statuses = statuses,
+    reports = reports,
+    fetchedAtUtcMs = fetchedAtUtcMs
+)
+
+private data class PreparedUpload(
+    val report: String,
+    val callsign: String,
+    val grid: String
+)
+
+private val MAIDENHEAD_GRID = Regex("^[A-R]{2}[0-9]{2}([A-X]{2})?$")

gradle/libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 #noinspection UnusedVersionCatalogEntry
-appVersionCode = "443"
+appVersionCode = "448"
 #noinspection UnusedVersionCatalogEntry
-appVersionName = "4.4.3"
+appVersionName = "4.4.6-ba7opf.4"
 #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"