fix: recalculate passes when station position changes

Use combine(selectedIds, stationPosition) in SatelliteRepo.initRepository
so that passes are recalculated on either satellite selection change or
station position change. StateFlow already emits distinct values.

.gitignore

@@ -18,6 +18,7 @@ out/
 # Gradle files
 .gradle/
 build/
+.cxx/
 
 # Local configuration file (sdk path, etc)
 local.properties

README.md

@@ -1,6 +1,6 @@
 # Look4Sat-BA7OPF
 
-[![Look4Sat CI](https://github.com/atsunatsu/Look4Sat/actions/workflows/release.yml/badge.svg)](https://github.com/atsunatsu/Look4Sat/actions/workflows/release.yml)
+[![Release](https://img.shields.io/github/v/release/atsunatsu/Look4Sat)](https://github.com/atsunatsu/Look4Sat/releases)
 
 **BA7OPF 定制版** — 基于 [rt-bishop/Look4Sat](https://github.com/rt-bishop/Look4Sat) 的业余无线电卫星追踪器，增加了线性卫星频率计算器等功能。
 

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

@@ -34,6 +34,7 @@ import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.withContext
 import java.util.TimeZone
@@ -63,19 +64,23 @@ class SatelliteRepo(
     override suspend fun getRadiosWithId(id: Int) = localStorage.getRadiosWithId(id)
 
     override suspend fun initRepository() = withContext(dispatcher) {
-        settingsRepo.selectedIds.collect { selectedIds ->
+        combine(
-            _satellites.update { localStorage.getEntriesWithIds(selectedIds) }
+            settingsRepo.selectedIds,
-            val settings = settingsRepo.passesSettings.value
+            settingsRepo.stationPosition
-            calculatePasses(
+        ) { selectedIds, _ -> selectedIds }
-                time = System.currentTimeMillis(),
+            .collect { selectedIds ->
-                hoursAhead = settings.hoursAhead,
+                _satellites.update { localStorage.getEntriesWithIds(selectedIds) }
-                minElevation = settings.minElevation,
+                val settings = settingsRepo.passesSettings.value
-                aosStartMinute = settings.aosStartMinute,
+                calculatePasses(
-                aosEndMinute = settings.aosEndMinute,
+                    time = System.currentTimeMillis(),
-                invertAosTimeWindow = settings.invertAosTimeWindow,
+                    hoursAhead = settings.hoursAhead,
-                modes = settings.selectedModes
+                    minElevation = settings.minElevation,
-            )
+                    aosStartMinute = settings.aosStartMinute,
-        }
+                    aosEndMinute = settings.aosEndMinute,
+                    invertAosTimeWindow = settings.invertAosTimeWindow,
+                    modes = settings.selectedModes
+                )
+            }
     }
 
     override suspend fun getPosition(sat: OrbitalObject, pos: GeoPos, time: Long): OrbitalPos {

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

@@ -144,11 +144,30 @@ object DopplerFrequencyCalculator {
         val modes = listOfNotNull(transponder.downlinkMode, transponder.uplinkMode)
             .joinToString(separator = " ")
             .lowercase(Locale.ENGLISH)
-        val hasLinearName = info.contains("linear")
+        val hasLinearName = info.contains("linear") || info.contains(" lin") || info.startsWith("lin")
         val hasTransponderName = info.contains("transponder") || info.contains("transp") ||
                 info.contains("xponder") || info.contains("xpdr")
         val hasLinearMode = listOf("ssb", "usb", "lsb", "cw").any { modes.contains(it) }
 
-        return (hasLinearName && hasTransponderName) || (hasTransponderName && hasLinearMode)
+        return (hasLinearName && hasTransponderName) || (hasTransponderName && hasLinearMode) ||
+                (hasLinearName && hasLinearMode)
+    }
+
+    /**
+     * Removes duplicate transponder entries that describe the same physical
+     * transponder with different mode labels (e.g. SatNOGS lists AO-7's Mode A
+     * as both "Lin SSB" and "Lin CW", and JO-97's U/V transponder as both
+     * "CW Transponder" and "SSB Transponder").
+     *
+     * Entries sharing the same uplink/downlink frequency range are considered
+     * the same transponder. The non-CW entry is preferred because its invert
+     * flag is more reliable (e.g. JO-97's CW entry wrongly has invert=false).
+     */
+    fun deduplicateTransponders(radios: List<SatRadio>): List<SatRadio> {
+        return radios.groupBy { radio ->
+            listOf(radio.uplinkLow, radio.uplinkHigh, radio.downlinkLow, radio.downlinkHigh)
+        }.values.map { group ->
+            group.firstOrNull { it.downlinkMode?.equals("CW", ignoreCase = true) != true } ?: group.first()
+        }
     }
 }

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

@@ -9,6 +9,7 @@ import org.junit.Test
 class DopplerFrequencyCalculatorTest {
 
     private fun linearTransponder(
+        uuid: String = "linear",
         upLow: Long = 145_000_000L,
         upHigh: Long = 145_500_000L,
         downLow: Long = 435_000_000L,
@@ -18,7 +19,7 @@ class DopplerFrequencyCalculatorTest {
         downlinkMode: String? = "USB",
         uplinkMode: String? = "LSB"
     ) = SatRadio(
-        uuid = "linear", info = info, isAlive = true,
+        uuid = uuid, info = info, isAlive = true,
         downlinkLow = downLow, downlinkHigh = downHigh,
         downlinkMode = downlinkMode, uplinkLow = upLow, uplinkHigh = upHigh,
         uplinkMode = uplinkMode, isInverted = inverted, catnum = 12345
@@ -68,11 +69,93 @@ class DopplerFrequencyCalculatorTest {
         assertFalse(DopplerFrequencyCalculator.isNamedLinearTransponder(driftingRangeEntry))
     }
 
+    @Test
+    fun isNamedLinearTransponder_returnsTrueForAbbreviatedLinName() {
+        // AO-7 style: "Mode V/A (A) Lin SSB" — "Lin" abbreviation, no "transponder" word
+        val ao7Entry = linearTransponder(info = "Mode V/A (A) Lin SSB", downlinkMode = "USB", uplinkMode = "USB")
+        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(ao7Entry))
+        val ao7CwEntry = linearTransponder(info = "Mode V/A (A) Lin CW", downlinkMode = "CW", uplinkMode = "CW")
+        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(ao7CwEntry))
+        val ao7ModeBEntry = linearTransponder(info = "Mode U/V (B) Lin", downlinkMode = "USB", uplinkMode = "LSB")
+        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(ao7ModeBEntry))
+    }
+
+    @Test
+    fun isNamedLinearTransponder_returnsTrueForLinearWithoutTransponderWord() {
+        // AO-73 style: "Mode U/V Linear" — has "Linear" but no "transponder"
+        val ao73Entry = linearTransponder(info = "Mode U/V Linear", downlinkMode = "USB", uplinkMode = "LSB")
+        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(ao73Entry))
+    }
+
+    @Test
+    fun isNamedLinearTransponder_returnsFalseForDownlinkContainingLinInsideWord() {
+        // "Downlink" contains "lin" but is not a linear-transponder name
+        val downlinkEntry = linearTransponder(info = "Mode U Downlink", downlinkMode = "FM", uplinkMode = "FM")
+        assertFalse(DopplerFrequencyCalculator.isNamedLinearTransponder(downlinkEntry))
+    }
+
     @Test
     fun isNamedLinearTransponder_returnsFalseForFmRepeater() {
         assertFalse(DopplerFrequencyCalculator.isNamedLinearTransponder(fmTransponder()))
     }
 
+    @Test
+    fun deduplicateTransponders_mergesSameFrequencyRange() {
+        // AO-7's Mode A: same range, SSB and CW entries
+        val ssb = linearTransponder(
+            uuid = "ssb-uuid", info = "Mode V/A (A) Lin SSB",
+            downlinkMode = "USB", uplinkMode = "USB"
+        )
+        val cw = linearTransponder(
+            uuid = "cw-uuid", info = "Mode V/A (A) Lin CW",
+            downlinkMode = "CW", uplinkMode = "CW"
+        )
+        val modeB = linearTransponder(
+            uuid = "modeb-uuid", info = "Mode U/V (B) Lin",
+            upLow = 432_125_000L, upHigh = 432_175_000L,
+            downLow = 145_925_000L, downHigh = 145_975_000L,
+            downlinkMode = "USB", uplinkMode = "LSB"
+        )
+        val result = DopplerFrequencyCalculator.deduplicateTransponders(listOf(ssb, cw, modeB))
+        assertEquals(2, result.size)
+        // SSB entry should be preferred over CW (same range)
+        assertEquals("ssb-uuid", result[0].uuid)
+        assertEquals("modeb-uuid", result[1].uuid)
+    }
+
+    @Test
+    fun deduplicateTransponders_prefersNonCwEntry() {
+        // JO-97: CW entry has invert=false (wrong), SSB has invert=true (correct)
+        val cw = linearTransponder(
+            uuid = "cw-uuid", info = "U/V CW Transponder",
+            downlinkMode = "CW", uplinkMode = "CW",
+            upLow = 435_100_000L, upHigh = 435_120_000L,
+            downLow = 145_855_000L, downHigh = 145_875_000L
+        )
+        val ssb = linearTransponder(
+            uuid = "ssb-uuid", info = "U/V SSB Transponder",
+            downlinkMode = "USB", uplinkMode = "LSB",
+            upLow = 435_100_000L, upHigh = 435_120_000L,
+            downLow = 145_855_000L, downHigh = 145_875_000L,
+            inverted = true
+        )
+        val result = DopplerFrequencyCalculator.deduplicateTransponders(listOf(cw, ssb))
+        assertEquals(1, result.size)
+        assertEquals("ssb-uuid", result[0].uuid)
+        // Verify the correct invert flag is preserved
+        assertTrue(result[0].isInverted)
+    }
+
+    @Test
+    fun deduplicateTransponders_preservesUniqueEntries() {
+        val t1 = linearTransponder(uuid = "t1", upLow = 145_000_000L, upHigh = 145_500_000L,
+            downLow = 435_000_000L, downHigh = 435_500_000L)
+        val t2 = linearTransponder(uuid = "t2", upLow = 435_000_000L, upHigh = 435_500_000L,
+            downLow = 145_000_000L, downHigh = 145_500_000L)
+        val result = DopplerFrequencyCalculator.deduplicateTransponders(listOf(t1, t2))
+        assertEquals(2, result.size)
+    }
+
     @Test
     fun computeUplinkFromDownlink_linear_noDoppler() {
         val xpdr = linearTransponder()

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

@@ -199,7 +199,8 @@
         \n• Dave Moten (predict4java)
         \n• Alexandru Csete (Gpredict)
         \n• Dr T.S. Kelso (Celestrak)
-        \n• Libre Space Foundation (SatNOGS)</string>
+        \n• Libre Space Foundation (SatNOGS)
+        \n• BG7NTA (CW decoding feature)</string>
     <string name="prefs_outro_license">Bu uygulama herhangi bir garanti sunmaz</string>
 
 </resources>

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

@@ -175,7 +175,40 @@
         \n• Alexandru Csete (Gpredict)
         \n• Dr T.S. Kelso (Celestrak)
         \n• Libre Space Foundation (SatNOGS)
-        \n• xdsopl 和 Robot36 贡献者!</string>
+        \n• xdsopl 和 Robot36 贡献者!
+        \n• BG7NTA（CW解码功能）</string>
     <string name="prefs_outro_license">该应用程序不提供任何保修.</string>
 
+    <!-- 匹配页 Mutual match page -->
+    <string name="mutual_title">过境匹配</string>
+    <string name="mutual_station_you">你的位置</string>
+    <string name="mutual_station_opposite">友台位置</string>
+    <string name="mutual_label_you">你</string>
+    <string name="mutual_label_opposite">友台</string>
+    <string name="mutual_status_calculating">正在计算双方共同可见窗口…</string>
+    <string name="mutual_status_error">请修正提示后重新查询</string>
+    <string name="mutual_status_matches">找到 %d 个匹配 · 点击卡片展开曲线</string>
+    <string name="mutual_status_none">未找到共同可见窗口，调整时间或仰角后重试</string>
+    <string name="mutual_status_idle">输入双方位置后点击查询</string>
+    <string name="mutual_chip_calculating">计算中</string>
+    <string name="mutual_chip_error">有错误</string>
+    <string name="mutual_chip_matches">%d 个匹配</string>
+    <string name="mutual_chip_none">无匹配</string>
+    <string name="mutual_chip_idle">待查询</string>
+    <string name="mutual_use_current">填入当前位置</string>
+    <string name="mutual_lat">纬度</string>
+    <string name="mutual_lon">经度</string>
+    <string name="mutual_grid">网格</string>
+    <string name="mutual_grid_hint">支持 4/6/8 位 Maidenhead 网格；也可直接输入经纬度</string>
+    <string name="mutual_min_elevation">最小仰角：%d°</string>
+    <string name="mutual_time_range">时间范围</string>
+    <string name="mutual_calculating">计算中…</string>
+    <string name="mutual_query">查询匹配</string>
+    <string name="mutual_elevation_you">你：%d°</string>
+    <string name="mutual_elevation_opposite">友台：%d°</string>
+    <string name="mutual_both_tracks">双方轨迹</string>
+    <string name="mutual_open_radar">查看雷达</string>
+    <string name="mutual_station_a">站点A</string>
+    <string name="mutual_station_b">站点B</string>
+
 </resources>

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

@@ -211,7 +211,40 @@
         \n* Dr T.S. Kelso (Celestrak)
         \n* Libre Space Foundation (SatNOGS)
         \n* xdsopl and Robot36 contributors!
+        \n* BG7NTA (CW decoding feature)
     </string>
     <string name="prefs_outro_license">The app comes with no warranty</string>
 
+    <!-- Mutual match page -->
+    <string name="mutual_title">Pass Match</string>
+    <string name="mutual_station_you">Your Station</string>
+    <string name="mutual_station_opposite">Opposite Station</string>
+    <string name="mutual_label_you">You</string>
+    <string name="mutual_label_opposite">Opposite</string>
+    <string name="mutual_status_calculating">Calculating mutual visibility windows…</string>
+    <string name="mutual_status_error">Fix the reported issues and retry</string>
+    <string name="mutual_status_matches">%d matches found · tap a card to expand</string>
+    <string name="mutual_status_none">No mutual windows found. Adjust time or min elevation and retry</string>
+    <string name="mutual_status_idle">Enter both stations, then tap Query</string>
+    <string name="mutual_chip_calculating">Calculating</string>
+    <string name="mutual_chip_error">Error</string>
+    <string name="mutual_chip_matches">%d matches</string>
+    <string name="mutual_chip_none">No matches</string>
+    <string name="mutual_chip_idle">Idle</string>
+    <string name="mutual_use_current">Use current</string>
+    <string name="mutual_lat">Lat</string>
+    <string name="mutual_lon">Lon</string>
+    <string name="mutual_grid">Grid</string>
+    <string name="mutual_grid_hint">Supports 4/6/8-char Maidenhead grid; or enter lat/lon directly</string>
+    <string name="mutual_min_elevation">Min elevation: %d°</string>
+    <string name="mutual_time_range">Time range</string>
+    <string name="mutual_calculating">Calculating…</string>
+    <string name="mutual_query">Query Match</string>
+    <string name="mutual_elevation_you">You: %d°</string>
+    <string name="mutual_elevation_opposite">Opposite: %d°</string>
+    <string name="mutual_both_tracks">Both tracks</string>
+    <string name="mutual_open_radar">Open Radar</string>
+    <string name="mutual_station_a">Station A</string>
+    <string name="mutual_station_b">Station B</string>
+
 </resources>

feature/cw/src/main/java/com/ve3nea/morse_expert/MainActivity.java

@@ -139,7 +139,7 @@ public class MainActivity {
     public void onResume() {
         android.content.SharedPreferences prefs = mActivity.getSharedPreferences(
             mActivity.getPackageName() + "_preferences", Context.MODE_PRIVATE);
-        String messageType = prefs.getString("message_type", "general_text");
+        String messageType = prefs.getString("message_type", "ham_radio_qso");
         b bVar = this.f11037F;
         if (bVar != null) {
             bVar.f623s.set(messageType.equals("ham_radio_qso"));

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

@@ -24,6 +24,7 @@ import androidx.compose.foundation.gestures.detectTapGestures
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
+import androidx.compose.ui.res.stringResource
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
@@ -40,6 +41,7 @@ import androidx.compose.ui.graphics.nativeCanvas
 import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import com.rtbishop.look4sat.core.presentation.R
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
@@ -226,8 +228,8 @@ fun ElevationCurveChart(
             modifier = Modifier.fillMaxWidth().padding(horizontal = 8.dp, vertical = 4.dp),
             horizontalArrangement = Arrangement.SpaceEvenly
         ) {
-            Text("● 站点A", color = colorA, fontSize = 12.sp)
+            Text(stringResource(R.string.mutual_station_a), color = colorA, fontSize = 12.sp)
-            Text("● 站点B", color = colorB, fontSize = 12.sp)
+            Text(stringResource(R.string.mutual_station_b), color = colorB, fontSize = 12.sp)
         }
     }
 }

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

@@ -57,8 +57,8 @@ private const val STROKE_WIDTH = 2.5f
 fun MutualRadarView(
     trackSamples: List<TrackSample>,
     progress: Float = 0.5f,
-    labelA: String = "站点A",
+    labelA: String = "Station A",
-    labelB: String = "站点B",
+    labelB: String = "Station B",
     modifier: Modifier = Modifier
 ) {
     if (trackSamples.isEmpty()) return

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

@@ -90,7 +90,7 @@ fun MutualScreen(
                 },
                 topInfo = {
                     Text(
-                        text = "过境匹配",
+                        text = stringResource(R.string.mutual_title),
                         style = MaterialTheme.typography.titleMedium,
                         fontWeight = FontWeight.Bold
                     )
@@ -198,7 +198,7 @@ private fun MutualContent(
             ) {
                 if (isVertical) {
                     StationInputCard(
-                        title = "你的位置",
+                        title = stringResource(R.string.mutual_station_you),
                         titleColor = MaterialTheme.colorScheme.primary,
                         lat = state.stationALat,
                         lon = state.stationALon,
@@ -214,7 +214,7 @@ private fun MutualContent(
                         currentPositionAction = onUseCurrentPosition
                     )
                     StationInputCard(
-                        title = "友台位置",
+                        title = stringResource(R.string.mutual_station_opposite),
                         titleColor = MaterialTheme.colorScheme.tertiary,
                         lat = state.stationBLat,
                         lon = state.stationBLon,
@@ -234,7 +234,7 @@ private fun MutualContent(
                         horizontalArrangement = Arrangement.spacedBy(6.dp)
                     ) {
                         StationInputCard(
-                            title = "你的位置",
+                            title = stringResource(R.string.mutual_station_you),
                             titleColor = MaterialTheme.colorScheme.primary,
                             lat = state.stationALat,
                             lon = state.stationALon,
@@ -251,7 +251,7 @@ private fun MutualContent(
                             modifier = Modifier.weight(1f)
                         )
                         StationInputCard(
-                            title = "友台位置",
+                            title = stringResource(R.string.mutual_station_opposite),
                             titleColor = MaterialTheme.colorScheme.tertiary,
                             lat = state.stationBLat,
                             lon = state.stationBLon,
@@ -294,8 +294,8 @@ private fun MutualContent(
                 startTime = pass.startTime,
                 endTime = pass.endTime,
                 maxElev = maxOf(pass.maxElevationA, pass.maxElevationB, 10.0),
-                labelA = "你",
+                labelA = stringResource(R.string.mutual_label_you),
-                labelB = "友台"
+                labelB = stringResource(R.string.mutual_label_opposite)
             )
             MutualPassCard(
                 pass = pass,
@@ -341,20 +341,22 @@ private fun MutualStatusChip(state: MutualUiState) {
     }
 }
 
+@Composable
 private fun mutualStatusText(state: MutualUiState): String = when {
-    state.isCalculating -> "正在计算双方共同可见窗口…"
+    state.isCalculating -> stringResource(R.string.mutual_status_calculating)
-    state.errorMessage != null -> "请修正提示后重新查询"
+    state.errorMessage != null -> stringResource(R.string.mutual_status_error)
-    state.mutualPasses.isNotEmpty() -> "找到 ${state.mutualPasses.size} 个匹配 · 点击卡片展开曲线"
+    state.mutualPasses.isNotEmpty() -> stringResource(R.string.mutual_status_matches, state.mutualPasses.size)
-    state.hasSearched -> "未找到共同可见窗口，调整时间或仰角后重试"
+    state.hasSearched -> stringResource(R.string.mutual_status_none)
-    else -> "输入双方位置后点击查询"
+    else -> stringResource(R.string.mutual_status_idle)
 }
 
+@Composable
 private fun mutualStatusChipText(state: MutualUiState): String = when {
-    state.isCalculating -> "计算中"
+    state.isCalculating -> stringResource(R.string.mutual_chip_calculating)
-    state.errorMessage != null -> "有错误"
+    state.errorMessage != null -> stringResource(R.string.mutual_chip_error)
-    state.mutualPasses.isNotEmpty() -> "${state.mutualPasses.size}个匹配"
+    state.mutualPasses.isNotEmpty() -> stringResource(R.string.mutual_chip_matches, state.mutualPasses.size)
-    state.hasSearched -> "无匹配"
+    state.hasSearched -> stringResource(R.string.mutual_chip_none)
-    else -> "待查询"
+    else -> stringResource(R.string.mutual_chip_idle)
 }
 
 @Composable
@@ -393,7 +395,7 @@ private fun StationInputCard(
                 )
                 if (currentPositionAction != null) {
                     OutlinedButton(onClick = currentPositionAction) {
-                        Text("填入当前位置", style = MaterialTheme.typography.bodySmall)
+                        Text(stringResource(R.string.mutual_use_current), style = MaterialTheme.typography.bodySmall)
                     }
                 }
             }
@@ -405,7 +407,7 @@ private fun StationInputCard(
                 OutlinedTextField(
                     value = lat,
                     onValueChange = onLatChange,
-                    label = { Text("纬度") },
+                    label = { Text(stringResource(R.string.mutual_lat)) },
                     placeholder = { Text(latPlaceholder) },
                     keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
                     singleLine = true,
@@ -414,7 +416,7 @@ private fun StationInputCard(
                 OutlinedTextField(
                     value = lon,
                     onValueChange = onLonChange,
-                    label = { Text("经度") },
+                    label = { Text(stringResource(R.string.mutual_lon)) },
                     placeholder = { Text(lonPlaceholder) },
                     keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
                     singleLine = true,
@@ -425,15 +427,15 @@ private fun StationInputCard(
             OutlinedTextField(
                 value = grid,
                 onValueChange = onGridChange,
-                label = { Text("网格") },
+                label = { Text(stringResource(R.string.mutual_grid)) },
                 placeholder = { Text(gridPlaceholder) },
-                supportingText = { Text("支持 4/6/8 位 Maidenhead 网格；也可直接输入经纬度") },
+                supportingText = { Text(stringResource(R.string.mutual_grid_hint)) },
                 singleLine = true,
                 modifier = Modifier.fillMaxWidth()
             )
 
             Text(
-                text = "最小仰角：${minElev.toInt()}°",
+                text = stringResource(R.string.mutual_min_elevation, minElev.toInt()),
                 style = MaterialTheme.typography.bodySmall,
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )
@@ -461,7 +463,7 @@ private fun MatchSearchCard(
             verticalArrangement = Arrangement.spacedBy(10.dp)
         ) {
             Text(
-                text = "时间范围",
+                text = stringResource(R.string.mutual_time_range),
                 style = MaterialTheme.typography.titleSmall,
                 fontWeight = FontWeight.Medium
             )
@@ -492,7 +494,7 @@ private fun MatchSearchCard(
                     )
                     Spacer(Modifier.width(8.dp))
                 }
-                Text(if (isCalculating) "计算中..." else "查询匹配")
+                Text(if (isCalculating) stringResource(R.string.mutual_calculating) else stringResource(R.string.mutual_query))
             }
         }
     }
@@ -558,12 +560,12 @@ private fun MutualPassCard(
                 horizontalArrangement = Arrangement.SpaceBetween
             ) {
                 Text(
-                    text = "你: ${pass.maxElevationA}°",
+                    text = stringResource(R.string.mutual_elevation_you, pass.maxElevationA.toInt()),
                     style = MaterialTheme.typography.bodySmall,
                     color = MaterialTheme.colorScheme.primary
                 )
                 Text(
-                    text = "友台: ${pass.maxElevationB}°",
+                    text = stringResource(R.string.mutual_elevation_opposite, pass.maxElevationB.toInt()),
                     style = MaterialTheme.typography.bodySmall,
                     color = MaterialTheme.colorScheme.tertiary
                 )
@@ -579,7 +581,7 @@ private fun MutualPassCard(
                     // Dual-station radar track (polar plot)
                     if (visibleTracks.isNotEmpty()) {
                         Text(
-                            text = "双方轨迹",
+                            text = stringResource(R.string.mutual_both_tracks),
                             style = MaterialTheme.typography.titleSmall,
                             fontWeight = FontWeight.Medium,
                             color = MaterialTheme.colorScheme.onSurfaceVariant
@@ -587,8 +589,8 @@ private fun MutualPassCard(
                         MutualRadarView(
                             trackSamples = visibleTracks,
                             progress = dragProgress,
-                            labelA = "你",
+                            labelA = stringResource(R.string.mutual_label_you),
-                            labelB = "友台"
+                            labelB = stringResource(R.string.mutual_label_opposite)
                         )
                         Spacer(Modifier.height(8.dp))
                     }
@@ -613,7 +615,7 @@ private fun MutualPassCard(
                             modifier = Modifier.height(16.dp).width(16.dp)
                         )
                         Spacer(Modifier.width(6.dp))
-                        Text("查看雷达")
+                        Text(stringResource(R.string.mutual_open_radar))
                     }
                 }
             }

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

@@ -158,13 +158,13 @@ class MutualViewModel(
         var posB = resolvePosition(state.stationBLat, state.stationBLon, state.stationBGrid)
 
         if (posA == null || posB == null) {
-            _uiState.update { it.copy(errorMessage = "请输入有效的位置坐标或网格（4/6/8位）") }
+            _uiState.update { it.copy(errorMessage = "Please enter valid coordinates or a Maidenhead grid (4/6/8 chars)") }
             return
         }
 
         val satellites = satelliteRepo.satellites.value
         if (satellites.isEmpty()) {
-            _uiState.update { it.copy(errorMessage = "没有卫星数据，请先在卫星列表中选择卫星") }
+            _uiState.update { it.copy(errorMessage = "No satellite data. Select satellites from the list first.") }
             return
         }
 
@@ -193,9 +193,9 @@ class MutualViewModel(
                 val passCount = satelliteRepo.passes.value.size
                 val satCount = satellites.size
                 when {
-                    passCount == 0 -> "过境列表为空，请先在卫星列表中选择卫星"
+                    passCount == 0 -> "Pass list is empty. Select satellites from the list first."
-                    satCount == 0 -> "没有已选中的卫星"
+                    satCount == 0 -> "No satellites selected."
-                    else -> "未找到共同过境（${passCount}个过境，${satCount}颗卫星）"
+                    else -> "No mutual passes found (${passCount} passes, ${satCount} satellites)."
                 }
             } else null
 

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

@@ -148,6 +148,7 @@ fun CalculatorPage(
 ) {
     val calculatorTransceivers = remember(transceivers) {
         transceivers.filter(DopplerFrequencyCalculator::isNamedLinearTransponder)
+            .let(DopplerFrequencyCalculator::deduplicateTransponders)
     }
     val selectedTransceiver = remember(calculatorTransceivers, selectedUuid) {
         calculatorTransceivers.firstOrNull { it.uuid == selectedUuid }