Added filters and sorters for Tropo reachability, AS availability and new big fields / locators. Added reachability band selector for tropo calculation based on a choosen band

src/main/java/kst4contest/controller/ChatController.java

@@ -1077,6 +1077,10 @@ public class ChatController implements ThreadStatusCallback, PstRotatorEventList
 
 	private DBController dbHandler;
 
+	private ReachabilityService reachabilityService;
+	private final WorkedGrossFieldCache workedGrossFieldCache = new WorkedGrossFieldCache();
+
+
 	private Socket socket;
 	private ServerSocket cluster_telnetServerSocket; // socket that accepts telnet client connects (cluster client)
 //	private ServerSocketChannel cluster_telnetServerSocketChannel;
@@ -1624,6 +1628,8 @@ public class ChatController implements ThreadStatusCallback, PstRotatorEventList
 		});
 
 		dbHandler = new DBController();
+		reachabilityService = new ReachabilityService(this);
+		rebuildWorkedGrossFieldCacheFromDatabase();
 
 //		chatPreferences = new ChatPreferences();
 //		chatPreferences.readPreferencesFromXmlFile(); // set the praktikst Prefs by file or default if file is corrupted
@@ -2090,6 +2096,103 @@ public class ChatController implements ThreadStatusCallback, PstRotatorEventList
 
 	}
 
+
+	/**
+	 * Returns the background reachability service used by the station table.
+	 *
+	 * @return reachability service
+	 */
+	public ReachabilityService getReachabilityService() {
+		return reachabilityService;
+	}
+
+	/**
+	 * Returns the runtime gross-field cache used by the new-locator filter.
+	 *
+	 * @return worked gross-field cache
+	 */
+	public WorkedGrossFieldCache getWorkedGrossFieldCache() {
+		return workedGrossFieldCache;
+	}
+
+	/**
+	 * Rebuilds the gross-field cache from persistent SQLite data and enriches it with
+	 * legacy ChatMember worked/qra rows where possible.
+	 */
+	public void rebuildWorkedGrossFieldCacheFromDatabase() {
+		if (dbHandler == null) {
+			return;
+		}
+
+		try {
+			workedGrossFieldCache.rebuildFromDatabaseSnapshot(dbHandler.fetchWorkedGrossFieldsFromDB());
+			workedGrossFieldCache.addWorkedBandsFromStoredChatMembers(dbHandler.fetchChatMemberWkdDataFromDB().values());
+		} catch (Exception exception) {
+			System.out.println("[ChatController, warning]: could not rebuild worked gross-field cache: "
+					+ exception.getMessage());
+		}
+	}
+
+	/**
+	 * Persists and caches one worked gross field after a logger QSO packet.
+	 *
+	 * @param band worked band
+	 * @param locator6 six-character Maidenhead locator
+	 * @param workedCall worked station
+	 * @param source logger/source name
+	 */
+	public void registerWorkedGrossField(Band band, String locator6, ChatMember workedCall, String source) {
+		if (band == null || locator6 == null) {
+			return;
+		}
+
+		String normalizedLocator6 = WorkedGrossFieldCache.extractLocator6(locator6);
+		if (normalizedLocator6 == null) {
+			return;
+		}
+
+		String callSignRaw = workedCall == null ? null : workedCall.getCallSignRaw();
+
+		try {
+			dbHandler.upsertWorkedGrossField(band, normalizedLocator6, callSignRaw, source);
+		} catch (Exception exception) {
+			System.out.println("[ChatController, warning]: could not persist worked gross field: "
+					+ exception.getMessage());
+		}
+
+		workedGrossFieldCache.addWorked(band, normalizedLocator6);
+		fireUserListUpdate("Worked gross field updated");
+	}
+
+	/**
+	 * Returns true when the member's gross field is not worked on at least one enabled
+	 * station band. This is the predicate behind the "new locator" filter.
+	 *
+	 * @param member member to inspect
+	 * @return true if the station is still a new locator on any enabled band
+	 */
+	public boolean isNewLocatorOnAnyEnabledBand(ChatMember member) {
+		if (member == null || member.getQra() == null) {
+			return false;
+		}
+
+		EnumSet<Band> enabledBands = reachabilityService == null
+				? getMyEnabledBandsFromPrefs(chatPreferences)
+				: reachabilityService.getEnabledStationBands();
+
+		if (enabledBands.isEmpty()) {
+			return false;
+		}
+
+		for (Band band : enabledBands) {
+			if (!workedGrossFieldCache.isGrossFieldWorked(band, member.getQra())) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
 	public long getCurrentEpochTime() {
 
 		OffsetDateTime currentTimeInUtc = OffsetDateTime.now(ZoneOffset.UTC);

src/main/java/kst4contest/controller/DBController.java

@@ -14,6 +14,12 @@ import kst4contest.ApplicationConstants;
 import kst4contest.model.ChatMember;
 import kst4contest.utils.ApplicationFileUtils;
 
+import java.util.EnumMap;
+import java.util.HashSet;
+import java.util.Set;
+
+import kst4contest.model.Band;
+
 public class DBController {
 
 	/**
@@ -37,7 +43,7 @@ public class DBController {
 	 * marker. The marker is stored in SQLite PRAGMA user_version so the expensive
 	 * normalization rebuild is executed only once per database file.
 	 */
-	private static final int CURRENT_DATABASE_SCHEMA_VERSION = 13;
+	private static final int CURRENT_DATABASE_SCHEMA_VERSION = 14;
 
 	/**
 	 * Minimum interval between two expiration cleanup runs. This avoids repeated full
@@ -136,6 +142,7 @@ public class DBController {
 	 */
 	private synchronized void ensureChatMemberTableCompatibility() {
 		createChatMemberTableIfRequired();
+		createWorkedGrossFieldTableIfRequired();
 		versionUpdateOfDBCheckAndChangeV11ToV12();
 		versionUpdateOfDBCheckAndChangeV12ToV13();
 
@@ -240,6 +247,30 @@ public class DBController {
 		}
 	}
 
+	/**
+	 * Creates the persistent gross-field table used by the new-locator filter.
+	 * The primary key is band + gross field because the filter only needs to know
+	 * whether a large locator square has already been worked on a band.
+	 */
+	private synchronized void createWorkedGrossFieldTableIfRequired() {
+
+		String createTableSql =
+				"CREATE TABLE IF NOT EXISTS WorkedGrossField ("
+						+ "band TEXT NOT NULL, "
+						+ "grossField TEXT NOT NULL, "
+						+ "locator TEXT, "
+						+ "callsign TEXT, "
+						+ "source TEXT, "
+						+ "lastWorkedEpochMs INTEGER NOT NULL, "
+						+ "PRIMARY KEY (band, grossField)"
+						+ ");";
+
+		try (Statement statement = connection.createStatement()) {
+			statement.executeUpdate(createTableSql);
+		} catch (SQLException e) {
+			throw new RuntimeException("[DBH, ERROR:] Could not create WorkedGrossField table", e);
+		}
+	}
 	/**
 	 * Updates old v1.1 databases to the v1.2 schema by adding the not-QRV fields if
 	 * they are missing.
@@ -477,7 +508,15 @@ public class DBController {
 		} catch (SQLException e) {
 			throw new RuntimeException("[DBH, ERROR:] Could not reset expired worked data", e);
 		}
-	}
+
+		try (PreparedStatement deleteGrossFieldsStatement = connection.prepareStatement(
+				"DELETE FROM WorkedGrossField WHERE lastWorkedEpochMs > 0 AND lastWorkedEpochMs < ?;")) {
+			deleteGrossFieldsStatement.setLong(1, expirationThresholdEpochMs);
+			deleteGrossFieldsStatement.executeUpdate();
+		} catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
 
 	/**
 	 * Stores a chatmember with its metadata in the database. The unique key is always
@@ -612,8 +651,14 @@ public class DBController {
 						+ "lastFlagsChangeEpochMs = 0;";
 
 		try (Statement statement = connection.createStatement()) {
-			return statement.executeUpdate(resetAllWorkedDataSql);
+//			return statement.executeUpdate(resetAllWorkedDataSql);
+			int affectedRows = statement.executeUpdate(resetAllWorkedDataSql);
+			statement.executeUpdate("DELETE FROM WorkedGrossField;");
+			return affectedRows;
+
+
 		} catch (SQLException e) {
+
 			System.err.println("[DBH, ERROR:] Couldn't reset the worked data");
 			e.printStackTrace();
 			return -1;
@@ -641,12 +686,27 @@ public class DBController {
 			return false;
 		}
 
+//		String updateWorkedSql =
+//				"UPDATE ChatMember SET worked = 1, " + workedBandColumnName + " = 1, lastFlagsChangeEpochMs = ? WHERE callsign = ?;";
+
 		String updateWorkedSql =
-				"UPDATE ChatMember SET worked = 1, " + workedBandColumnName + " = 1, lastFlagsChangeEpochMs = ? WHERE callsign = ?;";
+				"UPDATE ChatMember SET worked = 1, "
+						+ workedBandColumnName
+						+ " = 1, "
+						+ "qra = CASE WHEN ? IS NOT NULL AND TRIM(?) <> '' AND LOWER(TRIM(?)) <> 'unknown' THEN ? ELSE qra END, "
+						+ "lastFlagsChangeEpochMs = ? WHERE callsign = ?;";
 
 		try (PreparedStatement preparedStatement = connection.prepareStatement(updateWorkedSql)) {
-			preparedStatement.setLong(1, System.currentTimeMillis());
+//			preparedStatement.setLong(1, System.currentTimeMillis());
-			preparedStatement.setString(2, chatMemberToStore.getCallSignRaw());
+//			preparedStatement.setString(2, chatMemberToStore.getCallSignRaw());
+
+			String qra = chatMemberToStore.getQra();
+			preparedStatement.setString(1, qra);
+			preparedStatement.setString(2, qra);
+			preparedStatement.setString(3, qra);
+			preparedStatement.setString(4, qra);
+			preparedStatement.setLong(5, System.currentTimeMillis());
+			preparedStatement.setString(6, chatMemberToStore.getCallSignRaw());
 
 			int affectedRows = preparedStatement.executeUpdate();
 			return affectedRows > 0;
@@ -955,4 +1015,79 @@ public class DBController {
 		// dbc.storeChatMember(dummy);
 		// dbc.updateWkdInfoOnChatMember(dummy);
 	}
+
+	/**
+	 * Inserts or updates a worked gross field for the new-locator filter.
+	 *
+	 * @param band worked band
+	 * @param locator6 six-character Maidenhead locator
+	 * @param callsignRaw normalized raw callsign or null
+	 * @param source source identifier such as UCXLOG or WINTEST
+	 */
+	public synchronized void upsertWorkedGrossField(Band band, String locator6, String callsignRaw, String source) {
+
+		String grossField = WorkedGrossFieldCache.extractGrossField(locator6);
+		String normalizedLocator6 = WorkedGrossFieldCache.extractLocator6(locator6);
+
+		if (band == null || grossField == null) {
+			return;
+		}
+
+		String upsertSql =
+				"INSERT INTO WorkedGrossField (band, grossField, locator, callsign, source, lastWorkedEpochMs) "
+						+ "VALUES (?, ?, ?, ?, ?, ?) "
+						+ "ON CONFLICT(band, grossField) DO UPDATE SET "
+						+ "locator = COALESCE(excluded.locator, WorkedGrossField.locator), "
+						+ "callsign = COALESCE(excluded.callsign, WorkedGrossField.callsign), "
+						+ "source = excluded.source, "
+						+ "lastWorkedEpochMs = excluded.lastWorkedEpochMs;";
+
+		try (PreparedStatement preparedStatement = connection.prepareStatement(upsertSql)) {
+			preparedStatement.setString(1, band.name());
+			preparedStatement.setString(2, grossField);
+			preparedStatement.setString(3, normalizedLocator6);
+			preparedStatement.setString(4, callsignRaw);
+			preparedStatement.setString(5, source == null ? "UNKNOWN" : source);
+			preparedStatement.setLong(6, System.currentTimeMillis());
+			preparedStatement.executeUpdate();
+		} catch (SQLException e) {
+			throw new RuntimeException("[DBH, ERROR:] Could not upsert worked gross field", e);
+		}
+	}
+
+	/**
+	 * Loads all non-expired worked gross fields from the database.
+	 *
+	 * @return map of band to worked gross fields
+	 */
+	public synchronized Map<Band, Set<String>> fetchWorkedGrossFieldsFromDB() {
+
+		resetExpiredWorkedDataIfRequired();
+
+		Map<Band, Set<String>> result = new EnumMap<>(Band.class);
+
+		try (Statement statement = connection.createStatement();
+		     ResultSet resultSet = statement.executeQuery("SELECT band, grossField FROM WorkedGrossField ORDER BY band, grossField;")) {
+
+			while (resultSet.next()) {
+				Band band;
+				try {
+					band = Band.valueOf(resultSet.getString("band"));
+				} catch (Exception ignored) {
+					continue;
+				}
+
+				String grossField = WorkedGrossFieldCache.extractGrossField(resultSet.getString("grossField"));
+				if (grossField == null) {
+					continue;
+				}
+
+				result.computeIfAbsent(band, ignored -> new HashSet<>()).add(grossField);
+			}
+		} catch (SQLException e) {
+			throw new RuntimeException("[DBH, ERROR:] Could not fetch worked gross fields", e);
+		}
+
+		return result;
+	}
 }

src/main/java/kst4contest/controller/MessageBusManagementThread.java

@@ -327,6 +327,7 @@ public class MessageBusManagementThread extends Thread {
 				// 1. Store in the new Map (for future context/history)
 
 				sender.addKnownFrequency(finalDetectedBand, finalDetectedFrequency);
+				client.getReachabilityService().ensureTropoMarginCalculated(sender, finalDetectedBand);
 
 				//propagate known frequency to all instances of the same callsign (callRaw may exist multiple times)
 				try {
@@ -335,7 +336,7 @@ public class MessageBusManagementThread extends Thread {
 						ChatMember cm = client.getLst_chatMemberList().get(idx);
 						if (cm != null && cm != sender) {
 							cm.addKnownFrequency(finalDetectedBand, finalDetectedFrequency);
-						}
+							client.getReachabilityService().ensureTropoMarginCalculated(cm, finalDetectedBand);						}
 					}
 				} catch (Exception e) {
 					System.out.println("[SmartParser, warning]: failed to propagate known frequency across duplicates: " + e.getMessage());
@@ -587,6 +588,7 @@ public class MessageBusManagementThread extends Thread {
 
 				if (!client.getChatPreferences().getStn_loginCallSign().equals(newMember.getCallSign())) {
 					this.client.getLst_chatMemberList().add(newMember); //the own call will not be in the list
+					this.client.getReachabilityService().ensureAutoTropoMarginCalculated(newMember);
 				}
 
 
@@ -632,6 +634,7 @@ public class MessageBusManagementThread extends Thread {
 					newMember = this.client.getDbHandler().fetchChatMemberWkdDataForOnlyOneCallsignFromDB(newMember);
 
 					this.client.getLst_chatMemberList().add(newMember);
+					this.client.getReachabilityService().ensureAutoTropoMarginCalculated(newMember);
 
 					this.client.getDbHandler().storeChatMember(newMember);
 				}
@@ -1754,190 +1757,6 @@ public class MessageBusManagementThread extends Thread {
 					break;// TODO Change at may24, avoid uncloadability. Check if this could lead to further errors on instable link!
 	//				client.getMessageRXBus().clear();
 				}
-			{
-//				System.out.println("MessagebusmgtThread: Readthread is interrupted! Queue will be resetted");
-//				this.interrupt();
-//				client.getMessageRXBus().clear();
-			} 
-
-//			if (client.getMessageRXBus().peek() == null) {
-//
-//				Timer doNothingTimer = new Timer();
-//				doNothingTimer.schedule(new TimerTask() {
-//
-//					@Override
-//					public void run() {
-//
-//						//do nothing
-//
-//					}
-//				}, 100);// TODO: Temporary
-//			}
-//
-//
-//			if (client.getMessageRXBus().peek() == null && client.getMessageTXBus().peek() == null) {
-//
-//				if (this.client.isDisconnectionPerformedByUser()) {
-//					break;//TODO: what if it´s not the finally closage but a band channel change?
-//				}
-//				// do nothing
-////				try {
-////					this.sleep(20);
-////				} catch (InterruptedException e) {
-////					// TODO Auto-generated catch block
-////					e.printStackTrace();
-////				} catch (Exception e2) {
-////					// TODO Auto-generated catch block
-////					e2.printStackTrace();
-////				}
-//			}
-//			else
-			{
-
-//				messageLine = messageTextRaw.getMessageText();
-//
-//				/***********************************************
-//				 * CASE RX
-//				 ***********************************************/
-//
-////				if (client.getMessageRXBus().peek() != null) {
-//
-////					try {
-////						messageTextRaw = client.getMessageRXBus().take();
-////
-//////						System.out.println("MSBGBUS: rxed: " + messageTextRaw);
-////					} catch (InterruptedException e) {
-////						// TODO Auto-generated catch block
-////						e.printStackTrace();
-////					}
-//
-//					if (messageTextRaw.getMessageText() == null) {
-//						System.out.println("[MSGBUSMGT:] ERROR! got NULL message! BYE!");
-////					this.interrupt();
-////					break;
-//					}
-//
-//					messageLine = messageTextRaw.getMessageText();
-//
-////					try {
-////						bufwrtrRawMSGOut.write(messageLine + "\n");
-////						bufwrtrRawMSGOut.flush();
-////
-////					} catch (IOException e) {
-////						// TODO Auto-generated catch block
-////						e.printStackTrace();
-////					}
-//
-//					System.out.println(messageTextRaw.getMessageText() + " <- RXed"); // Stdout at
-//					// Console#######################################################TODO:Wichtig
-//
-//					try {
-//						processRXMessage23001(messageTextRaw);
-//					} catch (IOException e) {
-//						// TODO Auto-generated catch block
-//						e.printStackTrace();
-//					} catch (SQLException e) {
-//						// TODO Auto-generated catch block
-//						e.printStackTrace();
-//					}
-
-//				} //end peek != null
-
-				/**************************************************************
-				 * End of case RX
-				 **************************************************************/
-
-				/**************************************************************
-				 * Start of case TX
-				 **************************************************************/
-
-//				if (client.getMessageTXBus().peek() != null) {
-//					/***********************************************
-//					 * CASE TX
-//					 ***********************************************/
-//
-//					if (this.isServerready()) {
-//						// then send the line
-//
-//						try {
-//							messageTextRaw = client.getMessageTXBus().take();
-////						this.setServerready(false); // after tx always wait for an answer prompt //23000
-//							this.setServerready(true);
-//
-//						} catch (InterruptedException e) {
-//							// TODO Auto-generated catch block
-//							e.printStackTrace();
-//						}
-//
-//						messageLine = messageTextRaw.getMessageText();
-//
-//						if (messageTextRaw.isMessageDirectedToServer()) {
-//							/**
-//							 * We have to check if we only commands the server (keepalive) or want do talk
-//							 * to the community
-//							 */
-//
-//							try {
-//								client.getWriteThread().tx(messageTextRaw);
-//								System.out.println("BUS: tx: " + messageTextRaw.getMessageText());
-//
-//							} catch (InterruptedException e) {
-//								// TODO Auto-generated catch block
-//								e.printStackTrace();
-//							}
-//
-//							//////////////////////// bgfx ab here//////////////////////////////
-////						try {
-////							bufwrtrRawMSGOut.write(messageLine + "\r");
-//////							bw.write(messageLine + "\n");//kst4contest.test 4 23001
-////							bufwrtrRawMSGOut.flush();
-////
-////						} catch (IOException e) {
-////							// TODO Auto-generated catch block
-////							e.printStackTrace();
-////						}
-//							///////////////////////////////////////////////////////////////////
-//						} else {
-//
-//							ChatMessage ownMSG = new ChatMessage();
-//
-////						ownMSG.setMessageText(
-////								"MSG|" + this.client.getCategory().getCategoryNumber() + "|0|" + messageLine + "|0|");
-//
-//							ownMSG.setMessageText(
-//									"MSG|" + this.client.getChatPreferences().getLoginChatCategory().getCategoryNumber()
-//											+ "|0|" + messageLine + "|0|");
-//
-//							try {
-//								client.getWriteThread().tx(ownMSG);
-//								System.out.println("BUS: tx: " + ownMSG.getMessageText());
-//
-//							} catch (InterruptedException e) {
-//								// TODO Auto-generated catch block
-//								e.printStackTrace();
-//							}
-//						}
-//
-//						if (messageTextRaw.equals("/QUIT")) {
-//							try {
-//								this.client.getReadThread().terminateConnection();
-//								this.client.getReadThread().interrupt();
-//								this.client.getWriteThread().terminateConnection();
-//								this.client.getWriteThread().interrupt();
-//								this.interrupt();
-//
-//							} catch (IOException e) {
-//								// TODO Auto-generated catch block
-//								e.printStackTrace();
-//							}
-//						}
-//
-//					} else {
-////					System.out.println("msgbus no elements yet");
-//					}
-//				} //end tx.peek != null
-			}
-
 			
 		} // while true end
 		System.out.println("Msgbusmgt: interrupt");

src/main/java/kst4contest/controller/ReachabilityService.java

@@ -0,0 +1,231 @@
+package kst4contest.controller;
+
+import javafx.application.Platform;
+import kst4contest.locatorUtils.Location;
+import kst4contest.model.Band;
+import kst4contest.model.ChatCategory;
+import kst4contest.model.ChatMember;
+import kst4contest.model.ChatPreferences;
+import kst4contest.view.map.GeometryOnlyPathAnalysisService;
+import kst4contest.view.map.OpenMeteoTerrainProfileProvider;
+import kst4contest.view.map.PathAnalysisRequest;
+import kst4contest.view.map.PathAnalysisResult;
+import kst4contest.view.map.PathAnalysisService;
+import kst4contest.view.map.PathGeometryUtils;
+
+import java.util.Comparator;
+import java.util.EnumSet;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadFactory;
+
+/**
+ * Background service for station reachability values used by the station table.
+ *
+ * <p>The service performs the expensive full path analysis off the JavaFX thread,
+ * stores the bidirectional SSB margin in the ChatMember, and leaves the UI with a
+ * simple numeric value for sorting/filtering.</p>
+ */
+public final class ReachabilityService {
+
+    private final ChatController chatController;
+    private final PathAnalysisService pathAnalysisService;
+    private final ExecutorService executor;
+
+    /**
+     * Prevents duplicate jobs for the same logical station/band while a calculation
+     * is already queued or running.
+     */
+    private final Set<String> queuedCalculationKeys = ConcurrentHashMap.newKeySet();
+
+    public ReachabilityService(ChatController chatController) {
+        this.chatController = Objects.requireNonNull(chatController, "chatController");
+        this.pathAnalysisService = new GeometryOnlyPathAnalysisService(new OpenMeteoTerrainProfileProvider());
+        this.executor = Executors.newSingleThreadExecutor(new ReachabilityThreadFactory());
+    }
+
+    /**
+     * Ensures that the automatically selected reachability band is calculated.
+     *
+     * @param member chatmember to evaluate
+     */
+    public void ensureAutoTropoMarginCalculated(ChatMember member) {
+        ensureTropoMarginCalculated(member, resolveAutoBand(member));
+    }
+
+    /**
+     * Ensures that a station/band SSB-margin value exists. Existing finite values
+     * and existing NaN failure markers are not recalculated automatically.
+     *
+     * @param member chatmember to evaluate
+     * @param band band to evaluate
+     */
+    public void ensureTropoMarginCalculated(ChatMember member, Band band) {
+        if (member == null || band == null) {
+            return;
+        }
+
+        if (member.hasTropoSsbMarginDb(band)) {
+            return;
+        }
+
+        String calculationKey = buildCalculationKey(member, band);
+        if (!queuedCalculationKeys.add(calculationKey)) {
+            return;
+        }
+
+        executor.submit(() -> {
+            double marginDb = Double.NaN;
+            try {
+                marginDb = calculateSsbMarginDb(member, band);
+            } catch (Exception exception) {
+                System.out.println("[ReachabilityService, warning]: analysis failed for "
+                        + member.getCallSignRaw() + " @" + band + ": " + exception.getMessage());
+            }
+
+            final double finalMarginDb = marginDb;
+            Runnable storeResult = () -> {
+                member.setTropoSsbMarginDb(band, finalMarginDb);
+                chatController.fireUserListUpdate("Reachability calculated");
+            };
+
+            if (Platform.isFxApplicationThread()) {
+                storeResult.run();
+            } else {
+                Platform.runLater(storeResult);
+            }
+        });
+    }
+
+    /**
+     * Resolves the auto reachability band.
+     *
+     * <ol>
+     *     <li>Use the lowest band detected in this session.</li>
+     *     <li>If no session band exists and the station is in the microwave category, use 1296 MHz.</li>
+     *     <li>Otherwise use 144 MHz.</li>
+     * </ol>
+     *
+     * @param member member to inspect
+     * @return resolved band
+     */
+    public Band resolveAutoBand(ChatMember member) {
+        if (member != null && member.getKnownActiveBands() != null && !member.getKnownActiveBands().isEmpty()) {
+            return member.getKnownActiveBands().keySet().stream()
+                    .filter(Objects::nonNull)
+                    .min(Comparator.comparingDouble(Band::getDefaultAnalysisFrequencyMHz))
+                    .orElse(Band.B_144);
+        }
+
+        if (member != null
+                && member.getChatCategory() != null
+                && member.getChatCategory().getCategoryNumber() == ChatCategory.MICROWAVE) {
+            return Band.B_1296;
+        }
+
+        return Band.B_144;
+    }
+
+    /**
+     * Returns the active own bands configured in the station preferences. High bands
+     * above 10 GHz are intentionally ignored for the first version.
+     *
+     * @return set of enabled bands
+     */
+    public EnumSet<Band> getEnabledStationBands() {
+        ChatPreferences preferences = chatController.getChatPreferences();
+        EnumSet<Band> enabledBands = EnumSet.noneOf(Band.class);
+
+        if (preferences == null) {
+            return enabledBands;
+        }
+
+        if (preferences.isStn_bandActive144()) enabledBands.add(Band.B_144);
+        if (preferences.isStn_bandActive432()) enabledBands.add(Band.B_432);
+        if (preferences.isStn_bandActive1240()) enabledBands.add(Band.B_1296);
+        if (preferences.isStn_bandActive2300()) enabledBands.add(Band.B_2320);
+        if (preferences.isStn_bandActive3400()) enabledBands.add(Band.B_3400);
+        if (preferences.isStn_bandActive5600()) enabledBands.add(Band.B_5760);
+        if (preferences.isStn_bandActive10G()) enabledBands.add(Band.B_10G);
+
+        return enabledBands;
+    }
+
+    /**
+     * Stops the background executor.
+     */
+    public void shutdown() {
+        executor.shutdownNow();
+    }
+
+    private double calculateSsbMarginDb(ChatMember member, Band band) {
+        String ownLocator6 = normalizeLocator6(chatController.getChatPreferences().getStn_loginLocatorMainCat());
+        String targetLocator6 = normalizeLocator6(member.getQra());
+
+        if (ownLocator6.length() != 6 || targetLocator6.length() != 6) {
+            return Double.NaN;
+        }
+
+        Location homeLocation = new Location(ownLocator6);
+        Location targetLocation = new Location(targetLocator6);
+
+        double analysisFrequencyMHz = resolveAnalysisFrequencyForBand(member, band);
+
+        PathAnalysisRequest request = new PathAnalysisRequest(
+                ownLocator6,
+                homeLocation.getLatitude().toDegrees(),
+                homeLocation.getLongitude().toDegrees(),
+                member.getCallSignRaw(),
+                targetLocator6,
+                targetLocation.getLatitude().toDegrees(),
+                targetLocation.getLongitude().toDegrees(),
+                analysisFrequencyMHz,
+                chatController.getChatPreferences().getStn_pathAnalysisOwnAntennaHeightMeters(),
+                chatController.getChatPreferences().getStn_pathAnalysisDefaultTargetAntennaHeightMeters(),
+                PathGeometryUtils.DEFAULT_EFFECTIVE_EARTH_RADIUS_FACTOR,
+                chatController.getChatPreferences().buildPathLinkBudgetSettings()
+        );
+
+        PathAnalysisResult result = pathAnalysisService.analyze(request);
+        if (result == null || result.linkBudgetSummary() == null || !result.linkBudgetSummary().hasUsableBudget()) {
+            return Double.NaN;
+        }
+
+        return result.linkBudgetSummary().bidirectionalSsbMarginDb();
+    }
+
+    private double resolveAnalysisFrequencyForBand(ChatMember member, Band band) {
+        if (member != null && member.getKnownActiveBands() != null) {
+            ChatMember.ActiveFrequencyInfo activeFrequencyInfo = member.getKnownActiveBands().get(band);
+            if (activeFrequencyInfo != null
+                    && Double.isFinite(activeFrequencyInfo.frequency)
+                    && activeFrequencyInfo.frequency > 0.0) {
+                return activeFrequencyInfo.frequency;
+            }
+        }
+
+        return band.getDefaultAnalysisFrequencyMHz();
+    }
+
+    private String buildCalculationKey(ChatMember member, Band band) {
+        String callSignRaw = member.getCallSignRaw() == null ? "" : member.getCallSignRaw();
+        String locator = member.getQra() == null ? "" : member.getQra();
+        return callSignRaw.trim().toUpperCase() + "|" + locator.trim().toUpperCase() + "|" + band.name();
+    }
+
+    private String normalizeLocator6(String locator) {
+        return locator == null ? "" : locator.trim().toUpperCase();
+    }
+
+    private static final class ReachabilityThreadFactory implements ThreadFactory {
+        @Override
+        public Thread newThread(Runnable runnable) {
+            Thread thread = new Thread(runnable, "reachability-service");
+            thread.setDaemon(true);
+            return thread;
+        }
+    }
+}

src/main/java/kst4contest/controller/ReadUDPbyUCXMessageThread.java

@@ -22,6 +22,9 @@ import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
 
 import kst4contest.model.ChatMember;
+import kst4contest.model.Band;
+
+import javafx.application.Platform;
 
 /**
  * This thread is responsible for reading server's input and printing it to the
@@ -63,7 +66,111 @@ public class ReadUDPbyUCXMessageThread extends Thread {
 			System.out.println("UCXUDPRDR: catched error " + e.getMessage());
 		}
 	}
-	
+
+	/**
+	 * Strips binary logger framing bytes before the XML payload. Some UCXLog packets
+	 * contain transport bytes before the XML declaration.
+	 *
+	 * @param rawPacket raw UDP payload
+	 * @return cleaned XML string or trimmed original text
+	 */
+	private String helper_extractXmlPayload(String rawPacket) {
+		if (rawPacket == null) {
+			return "";
+		}
+
+		int xmlStart = rawPacket.indexOf("<?xml");
+		if (xmlStart < 0) {
+			xmlStart = rawPacket.indexOf("<contactinfo");
+		}
+		if (xmlStart < 0) {
+			xmlStart = rawPacket.indexOf("<RadioInfo");
+		}
+
+		return xmlStart >= 0
+				? rawPacket.substring(xmlStart).trim()
+				: rawPacket.trim();
+	}
+
+	/**
+	 * Reads an optional XML child node.
+	 *
+	 * @param element parent element
+	 * @param tagName tag to read
+	 * @return trimmed value or empty string
+	 */
+	private String helper_getOptionalElementText(Element element, String tagName) {
+		if (element == null || tagName == null) {
+			return "";
+		}
+
+		NodeList nodeList = element.getElementsByTagName(tagName);
+		if (nodeList == null || nodeList.getLength() == 0 || nodeList.item(0) == null) {
+			return "";
+		}
+
+		String textContent = nodeList.item(0).getTextContent();
+		return textContent == null ? "" : textContent.trim();
+	}
+
+	/**
+	 * Resolves the QSO locator from UCXLog contactinfo. gridsquare is preferred,
+	 * rcvnr is used as fallback for exchanges such as 001JO41HK.
+	 *
+	 * @param element contactinfo XML element
+	 * @return normalized six-character locator or null
+	 */
+	private String helper_resolveLocatorFromContactInfo(Element element) {
+		String gridSquare = WorkedGrossFieldCache.extractLocator6(helper_getOptionalElementText(element, "gridsquare"));
+		if (gridSquare != null) {
+			return gridSquare;
+		}
+
+		return WorkedGrossFieldCache.extractLocator6(helper_getOptionalElementText(element, "rcvnr"));
+	}
+
+	/**
+	 * Resolves the project Band enum from logger band values.
+	 *
+	 * @param band logger band text
+	 * @return matching Band or null
+	 */
+	private Band helper_resolveBandFromLoggerBand(String band) {
+		if (band == null) {
+			return null;
+		}
+
+		switch (band.trim()) {
+			case "144":
+			case "2m":
+				return Band.B_144;
+			case "432":
+			case "70cm":
+				return Band.B_432;
+			case "1240":
+			case "1296":
+			case "23cm":
+				return Band.B_1296;
+			case "2300":
+			case "2320":
+			case "13cm":
+				return Band.B_2320;
+			case "3400":
+			case "9cm":
+				return Band.B_3400;
+			case "5600":
+			case "5760":
+			case "6cm":
+				return Band.B_5760;
+			case "10G":
+			case "10368":
+			case "3cm":
+				return Band.B_10G;
+			default:
+				return null;
+		}
+	}
+
 	public void run() {
 
         System.out.println("ReadUDPByUCXLogThread: started Thread for UCXLog getUDP");
@@ -177,7 +284,7 @@ public class ReadUDPbyUCXMessageThread extends Thread {
 
 		File logUDPMessageToThisFile;
 
-		String udpMsg = udpPacketToProcess;
+		String udpMsg = helper_extractXmlPayload(udpPacketToProcess);
 
 		ChatMember modifyThat = null;
 
@@ -221,10 +328,9 @@ public class ReadUDPbyUCXMessageThread extends Thread {
 						Element element = (Element) node;
 
 						String call = element.getElementsByTagName("call").item(0).getTextContent();
-//						call = call.toLowerCase();
+						String band = helper_getOptionalElementText(element, "band");
-						String band = element.getElementsByTagName("band").item(0).getTextContent();
+						String gridSquare = helper_resolveLocatorFromContactInfo(element);
-
+						String points = helper_getOptionalElementText(element, "points");
-						String points = element.getElementsByTagName("points").item(0).getTextContent();
 
 						System.out.println("[Readudp, info ]: received Current Element :" + node.getNodeName()
 								+ "call: " + call + " / " + band + " ----> " + points + " POINTS");
@@ -235,6 +341,12 @@ public class ReadUDPbyUCXMessageThread extends Thread {
 						workedCall.setCallSign(call);
 						workedCall.setWorked(true);
 
+						if (gridSquare != null) {
+							workedCall.setQra(gridSquare);
+						}
+
+						Band workedBand = helper_resolveBandFromLoggerBand(band);
+
 						switch (band) {
 						case "144": {
 							workedCall.setWorked144(true);
@@ -304,14 +416,14 @@ public class ReadUDPbyUCXMessageThread extends Thread {
 							break;
 						}
 
-						case "3cm": {
+							case "3cm": {
-							workedCall.setWorked10G(true);
+								workedCall.setWorked10G(true);
+								break;
+							}
 
-						}
+							default:
-
+								System.out.println("[ReadUDPFromUCX, Error:] unexpected band value: \"" + band + "\"");
-						default:
+								break;
-							System.out.println("[ReadUDPFromUCX, Error:] unexpected band value: \"" + band + "\"");
-							break;
 						}
 
 //						if (!client.getMap_ucxLogInfoWorkedCalls().containsKey("call")) {
@@ -452,14 +564,22 @@ public class ReadUDPbyUCXMessageThread extends Thread {
 							 */
 						}
 
+						if (workedBand != null && gridSquare != null) {
+							this.client.registerWorkedGrossField(workedBand, gridSquare, workedCall, "UCXLOG");
+						}
+
 						boolean isInChat = this.client.getDbHandler().updateWkdInfoOnChatMember(workedCall);
 						// This will update the worked info on a worked chatmember. DBHandler will
 						// check, if an entry at the db had been modified. If not, then the worked
 						// station had not been stored. DBHandler will store the information then.
 						if (!isInChat) {
-							
+
 							workedCall.setName("unknown");
-							workedCall.setQra("unknown");
+
+							if (workedCall.getQra() == null || workedCall.getQra().isBlank()) {
+								workedCall.setQra("unknown");
+							}
+
 							workedCall.setLastActivity(new Utils4KST().time_generateActualTimeInDateFormat());
 							this.client.getDbHandler().storeChatMember(workedCall);
 						}
@@ -550,8 +670,13 @@ public class ReadUDPbyUCXMessageThread extends Thread {
 //						System.out.println("Radio Mode: " + mode);
 //						System.out.println("[ReadUDPFromUCX, Info:] Setted QRG pref to: \"" + qrg + "\"" );
 
-						this.client.getChatPreferences().getMYQRGFirstCat().set(formattedQRG);
+//						this.client.getChatPreferences().getMYQRGFirstCat().set(formattedQRG);
-						
+
+						final String finalFormattedQRG = formattedQRG;
+						helper_runOnFxThread(() ->
+								this.client.getChatPreferences().getMYQRGFirstCat().set(finalFormattedQRG)
+						);
+
 //						System.out.println("[ReadUDPbyUCXTh: ] Radioinfo processed: " + formattedQRG);
 					}
 				}
@@ -604,6 +729,28 @@ public class ReadUDPbyUCXMessageThread extends Thread {
 		this.socket.close();
 
 		return true;
+
+	}
+
+	/**
+	 * Runs UI-bound changes on the JavaFX application thread.
+	 *
+	 * <p>UCXLog UDP packets are processed in a background thread. Some preference
+	 * properties are bound to JavaFX controls, so setting them directly from this
+	 * thread can crash JavaFX with "Not on FX application thread".</p>
+	 *
+	 * @param runnable UI-bound update
+	 */
+	private void helper_runOnFxThread(Runnable runnable) {
+		if (runnable == null) {
+			return;
+		}
+
+		if (Platform.isFxApplicationThread()) {
+			runnable.run();
+		} else {
+			Platform.runLater(runnable);
+		}
 	}
 
 }

src/main/java/kst4contest/controller/ScoreService.java

@@ -182,6 +182,7 @@ public final class ScoreService {
 
         // 4) Publish to UI in ONE batched runLater
         Platform.runLater(() -> {
+            applyScoreSnapshotToChatMembers(snap);
             topCandidatesFx.setAll(snap.getTopCandidates());
             updateSelectedScoreFromSnapshot(snap);
             uiPulse.set(uiPulse.get() + 1);
@@ -237,6 +238,31 @@ public final class ScoreService {
 
         return representative;
     }
+    /**
+     * Projects the immutable score snapshot back into ChatMember display fields so
+     * the normal station table can sort/filter by score without knowing the score
+     * calculation internals.
+     *
+     * @param snap latest score snapshot
+     */
+    private void applyScoreSnapshotToChatMembers(ScoreSnapshot snap) {
+        if (snap == null) {
+            return;
+        }
+
+        Map<String, Double> scoreByCallSignRaw = snap.getScoreByCallSignRaw();
+
+        for (ChatMember member : controller.snapshotChatMembers()) {
+            if (member == null || member.getCallSignRaw() == null) {
+                continue;
+            }
+
+            Double score = scoreByCallSignRaw.get(normalizeCallRaw(member.getCallSignRaw()));
+            member.setCurrentPriorityScore(score == null ? 0.0 : score);
+        }
+
+        controller.fireUserListUpdate("Priority scores projected to ChatMember");
+    }
 
     private void updateSelectedScoreFromSnapshot(ScoreSnapshot snap) {
         if (snap == null || selectedCallSignRaw == null) {

src/main/java/kst4contest/controller/WorkedGrossFieldCache.java

@@ -0,0 +1,175 @@
+package kst4contest.controller;
+
+import kst4contest.model.Band;
+import kst4contest.model.ChatMember;
+
+import java.util.Collection;
+import java.util.EnumMap;
+import java.util.HashSet;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Runtime cache for worked Maidenhead gross fields per band.
+ *
+ * <p>The cache is used by the "new locator" station filter. It is kept in memory
+ * for fast UI predicates and rebuilt from SQLite on startup/refresh. New QSO log
+ * packets update both SQLite and this cache immediately.</p>
+ */
+public final class WorkedGrossFieldCache {
+
+    private static final Pattern MAIDENHEAD_6_PATTERN =
+            Pattern.compile("(?i)([A-R]{2}[0-9]{2}[A-X]{2})");
+
+    private final Map<Band, Set<String>> workedGrossFieldsByBand = new EnumMap<>(Band.class);
+
+    /**
+     * Replaces the full cache content with data read from the database.
+     *
+     * @param databaseSnapshot map of band to worked gross fields
+     */
+    public synchronized void rebuildFromDatabaseSnapshot(Map<Band, Set<String>> databaseSnapshot) {
+        workedGrossFieldsByBand.clear();
+
+        if (databaseSnapshot == null) {
+            return;
+        }
+
+        for (Map.Entry<Band, Set<String>> entry : databaseSnapshot.entrySet()) {
+            Band band = entry.getKey();
+            Set<String> grossFields = entry.getValue();
+
+            if (band == null || grossFields == null) {
+                continue;
+            }
+
+            Set<String> normalizedGrossFields = workedGrossFieldsByBand.computeIfAbsent(band, ignored -> new HashSet<>());
+            for (String grossField : grossFields) {
+                String normalizedGrossField = normalizeGrossField(grossField);
+                if (normalizedGrossField != null) {
+                    normalizedGrossFields.add(normalizedGrossField);
+                }
+            }
+        }
+    }
+
+    /**
+     * Adds one worked locator to the cache.
+     *
+     * @param band worked band
+     * @param locatorOrGrossField six-character locator or four-character gross field
+     */
+    public synchronized void addWorked(Band band, String locatorOrGrossField) {
+        String grossField = extractGrossField(locatorOrGrossField);
+        if (band == null || grossField == null) {
+            return;
+        }
+
+        workedGrossFieldsByBand
+                .computeIfAbsent(band, ignored -> new HashSet<>())
+                .add(grossField);
+    }
+
+    /**
+     * Adds all worked-band flags from stored ChatMember rows. This is only a fallback
+     * for legacy data before WorkedGrossField existed or when logger packets did not
+     * provide a locator.
+     *
+     * @param storedMembers stored ChatMember rows
+     */
+    public synchronized void addWorkedBandsFromStoredChatMembers(Collection<ChatMember> storedMembers) {
+        if (storedMembers == null) {
+            return;
+        }
+
+        for (ChatMember member : storedMembers) {
+            if (member == null) {
+                continue;
+            }
+
+            String locator = member.getQra();
+            if (member.isWorked144()) addWorked(Band.B_144, locator);
+            if (member.isWorked432()) addWorked(Band.B_432, locator);
+            if (member.isWorked1240()) addWorked(Band.B_1296, locator);
+            if (member.isWorked2300()) addWorked(Band.B_2320, locator);
+            if (member.isWorked3400()) addWorked(Band.B_3400, locator);
+            if (member.isWorked5600()) addWorked(Band.B_5760, locator);
+            if (member.isWorked10G()) addWorked(Band.B_10G, locator);
+        }
+    }
+
+    /**
+     * Checks whether a locator gross field is already worked on a band.
+     *
+     * @param band band to check
+     * @param locatorOrGrossField six-character locator or four-character gross field
+     * @return true if the gross field is already worked on that band
+     */
+    public synchronized boolean isGrossFieldWorked(Band band, String locatorOrGrossField) {
+        String grossField = extractGrossField(locatorOrGrossField);
+        if (band == null || grossField == null) {
+            return false;
+        }
+
+        return workedGrossFieldsByBand
+                .getOrDefault(band, Set.of())
+                .contains(grossField);
+    }
+
+    /**
+     * Tries to normalize a locator. Accepts a plain six-character locator or extracts
+     * one from exchange strings such as "001JO41HK".
+     *
+     * @param rawLocatorOrExchange raw locator/exchange text
+     * @return normalized six-character locator, or null if none was found
+     */
+    public static String extractLocator6(String rawLocatorOrExchange) {
+        if (rawLocatorOrExchange == null || rawLocatorOrExchange.isBlank()) {
+            return null;
+        }
+
+        Matcher matcher = MAIDENHEAD_6_PATTERN.matcher(rawLocatorOrExchange.trim());
+        if (!matcher.find()) {
+            return null;
+        }
+
+        return matcher.group(1).toUpperCase(Locale.ROOT);
+    }
+
+    /**
+     * Extracts and normalizes the four-character gross field.
+     *
+     * @param rawLocatorOrGrossField six-character locator, four-character gross field or exchange text
+     * @return normalized gross field, or null if no valid value is available
+     */
+    public static String extractGrossField(String rawLocatorOrGrossField) {
+        if (rawLocatorOrGrossField == null || rawLocatorOrGrossField.isBlank()) {
+            return null;
+        }
+
+        String trimmed = rawLocatorOrGrossField.trim().toUpperCase(Locale.ROOT);
+
+        if (trimmed.matches("[A-R]{2}[0-9]{2}")) {
+            return trimmed;
+        }
+
+        String locator6 = extractLocator6(trimmed);
+        if (locator6 == null || locator6.length() < 4) {
+            return null;
+        }
+
+        return locator6.substring(0, 4);
+    }
+
+    private static String normalizeGrossField(String grossField) {
+        if (grossField == null) {
+            return null;
+        }
+
+        String normalized = grossField.trim().toUpperCase(Locale.ROOT);
+        return normalized.matches("[A-R]{2}[0-9]{2}") ? normalized : null;
+    }
+}

src/main/java/kst4contest/model/Band.java

@@ -29,6 +29,35 @@ public enum Band {
         return prefix;
     }
 
+    /**
+     * Returns the lower edge used as practical analysis frequency when only the band
+     * is known. This keeps the batch reachability calculation deterministic.
+     *
+     * @return frequency in MHz
+     */
+    public double getDefaultAnalysisFrequencyMHz() {
+        return minFreq;
+    }
+
+    /**
+     * Returns a compact label for table display and filter controls.
+     *
+     * @return human readable band label
+     */
+    public String getDisplayLabel() {
+        switch (this) {
+            case B_144: return "144";
+            case B_432: return "432";
+            case B_1296: return "1296";
+            case B_2320: return "2320";
+            case B_3400: return "3400";
+            case B_5760: return "5760";
+            case B_10G: return "10G";
+            case B_24G: return "24G";
+            default: return prefix;
+        }
+    }
+
     /**
      * Checks if a specific frequency falls within this band's limits.
      */

src/main/java/kst4contest/model/ChatMember.java

@@ -10,10 +10,13 @@ import javafx.beans.property.SimpleBooleanProperty;
 import javafx.beans.property.BooleanProperty;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
+import java.util.OptionalDouble;
 
 public class ChatMember {
 
 
+
+
 	long lastFlagsChangeEpochMs; // timestamp of the last worked/not-QRV flag change in the internal DB
 
 	//	private final BooleanProperty workedInfoChangeFireListEventTrigger = new SimpleBooleanProperty();
@@ -74,6 +77,10 @@ public class ChatMember {
 	// Stores the last known frequency per band (Context History)
 	private final Map<Band, ActiveFrequencyInfo> knownActiveBands = new ConcurrentHashMap<>();
 
+	// Stores the calculated bidirectional SSB tropo margin per band.
+	// Values are calculated by the reachability backend and used only for UI sorting/filtering.
+	private final Map<Band, Double> tropoSsbMarginDbByBand = new ConcurrentHashMap<>();
+
 
 	// --- INNER CLASS FOR QRG HISTORY ---
 	public class ActiveFrequencyInfo {
@@ -620,6 +627,74 @@ public class ChatMember {
 		return knownActiveBands;
 	}
 
+	/**
+	 * Stores the calculated bidirectional SSB tropo margin for one band.
+	 *
+	 * <p>The value is deliberately stored in ChatMember because the station table
+	 * can then sort and filter directly without triggering a new RF calculation.
+	 * The actual calculation stays outside ChatMember.</p>
+	 *
+	 * @param band band for which the margin was calculated
+	 * @param marginDb bidirectional SSB margin in dB; NaN marks an attempted but failed analysis
+	 */
+	public void setTropoSsbMarginDb(Band band, double marginDb) {
+		if (band == null) {
+			return;
+		}
+
+		this.tropoSsbMarginDbByBand.put(band, marginDb);
+	}
+
+	/**
+	 * Returns true if a tropo analysis result already exists for the given band.
+	 *
+	 * <p>A stored NaN also counts as an existing result because it means the analysis
+	 * was attempted and failed. This prevents endless retry loops when a terrain
+	 * provider is temporarily unavailable.</p>
+	 *
+	 * @param band band to check
+	 * @return true if a value or NaN marker is stored
+	 */
+	public boolean hasTropoSsbMarginDb(Band band) {
+		return band != null && this.tropoSsbMarginDbByBand.containsKey(band);
+	}
+
+	/**
+	 * Reads the calculated tropo SSB margin for one band.
+	 *
+	 * @param band band to read
+	 * @return OptionalDouble with the stored value, or empty if no calculation exists yet
+	 */
+	public OptionalDouble getTropoSsbMarginDb(Band band) {
+		if (band == null || !this.tropoSsbMarginDbByBand.containsKey(band)) {
+			return OptionalDouble.empty();
+		}
+
+		Double storedValue = this.tropoSsbMarginDbByBand.get(band);
+		if (storedValue == null) {
+			return OptionalDouble.empty();
+		}
+
+		return OptionalDouble.of(storedValue);
+	}
+
+	/**
+	 * Formats the calculated tropo margin for direct table display.
+	 *
+	 * @param band selected/auto-resolved reachability band
+	 * @return display text such as "+8.4 dB @144" or "- @144"
+	 */
+	public String formatTropoSsbMarginForBand(Band band) {
+		String bandLabel = band == null ? "?" : band.getDisplayLabel();
+		OptionalDouble marginDb = getTropoSsbMarginDb(band);
+
+		if (marginDb.isEmpty() || !Double.isFinite(marginDb.getAsDouble())) {
+			return "- @" + bandLabel;
+		}
+
+		return String.format(Locale.US, "%+.1f dB @%s", marginDb.getAsDouble(), bandLabel);
+	}
+
 
 	/**
 	 * If a sked fails and the user tells this to the client, this counter will be increased to give the station a

src/main/java/kst4contest/view/Kst4ContestApplication.java

@@ -71,6 +71,8 @@ import kst4contest.view.map.OfflineDemImportService;
 
 public class Kst4ContestApplication extends Application implements StatusUpdateListener  {
 //	private static final Kst4ContestApplication dbcontroller = new DBController();
+	// Null means Auto: use the lowest session band, or category fallback.
+	private Band selectedReachabilityBandOverride = null;
 
 	private StationMapView stationMapView; //view class for the avl stn map
 	private StationMapBridge stationMapBridge; //bridge for mapping actions between map and view
@@ -1387,6 +1389,29 @@ public class Kst4ContestApplication extends Application implements StatusUpdateL
 		 */
 
 
+		TableColumn<ChatMember, String> tropoCol = new TableColumn<ChatMember, String>("Tropo");
+		tropoCol.setCellValueFactory(new Callback<CellDataFeatures<ChatMember, String>, ObservableValue<String>>() {
+			@Override
+			public ObservableValue<String> call(CellDataFeatures<ChatMember, String> cellDataFeatures) {
+				ChatMember member = cellDataFeatures.getValue();
+				Band selectedBand = resolveReachabilityBandForUi(member);
+				chatcontroller.getReachabilityService().ensureTropoMarginCalculated(member, selectedBand);
+				return new SimpleStringProperty(member.formatTropoSsbMarginForBand(selectedBand));
+			}
+		});
+		tropoCol.setComparator((left, right) -> Double.compare(parseTableDouble(left), parseTableDouble(right)));
+		tropoCol.prefWidthProperty().bind(tbl_chatMemberTable.widthProperty().divide(13));
+
+		TableColumn<ChatMember, String> priorityScoreCol = new TableColumn<ChatMember, String>("Score");
+		priorityScoreCol.setCellValueFactory(new Callback<CellDataFeatures<ChatMember, String>, ObservableValue<String>>() {
+			@Override
+			public ObservableValue<String> call(CellDataFeatures<ChatMember, String> cellDataFeatures) {
+				return new SimpleStringProperty(formatPriorityScore(cellDataFeatures.getValue()));
+			}
+		});
+		priorityScoreCol.setComparator((left, right) -> Double.compare(parseTableDouble(left), parseTableDouble(right)));
+		priorityScoreCol.prefWidthProperty().bind(tbl_chatMemberTable.widthProperty().divide(18));
+
 		TableColumn<ChatMember, String> lastActCol = new TableColumn<ChatMember, String>("Act");
 		lastActCol.setCellValueFactory(new Callback<CellDataFeatures<ChatMember, String>, ObservableValue<String>>() {
 
@@ -1689,7 +1714,10 @@ public class Kst4ContestApplication extends Application implements StatusUpdateL
 
 
 
-		tbl_chatMemberTable.getColumns().addAll(callSignCol, nameCol, qraCol, qrBCol, qtfCol, qrgCol, lastActCol, airScoutCol, workedCol, notQRVCol, chatCategoryCol);
+//		tbl_chatMemberTable.getColumns().addAll(callSignCol, nameCol, qraCol, qrBCol, qtfCol, qrgCol, lastActCol, airScoutCol, workedCol, notQRVCol, chatCategoryCol);
+
+		tbl_chatMemberTable.getColumns().addAll(callSignCol, nameCol, qraCol, qrBCol, qtfCol, qrgCol, tropoCol, priorityScoreCol, lastActCol, airScoutCol, workedCol, notQRVCol, chatCategoryCol);
+
 
 //		tbl_chatMemberTable.setItems(chatcontroller.getLst_chatMemberListFiltered());
 
@@ -6061,6 +6089,84 @@ public class Kst4ContestApplication extends Application implements StatusUpdateL
 
 			TextField chatMemberTableFilterMaxQrbTF = new TextField(chatcontroller.getChatPreferences().getStn_maxQRBDefault() + "");
 			chatMemberTableFilterMaxQrbTF.setFocusTraversable(false);
+
+
+			ToggleButton btnTglNewLocator = new ToggleButton("New locator");
+			Predicate<ChatMember> newLocatorPredicate = new Predicate<ChatMember>() {
+				@Override
+				public boolean test(ChatMember chatMember) {
+					return chatcontroller.isNewLocatorOnAnyEnabledBand(chatMember);
+				}
+			};
+			btnTglNewLocator.setOnAction(new EventHandler<ActionEvent>() {
+				@Override
+				public void handle(ActionEvent actionEvent) {
+					if (btnTglNewLocator.isSelected()) {
+						chatcontroller.getLst_chatMemberListFilterPredicates().add(newLocatorPredicate);
+					} else {
+						chatcontroller.getLst_chatMemberListFilterPredicates().remove(newLocatorPredicate);
+					}
+				}
+			});
+			btnTglNewLocator.setTooltip(new Tooltip("Show only stations whose gross locator is still new on at least one active own band"));
+
+			ToggleButton btnTglReachableTropo = new ToggleButton("Tropo >=0dB");
+			Predicate<ChatMember> reachableTropoPredicate = new Predicate<ChatMember>() {
+				@Override
+				public boolean test(ChatMember chatMember) {
+					return isReachableViaTropoFilterMatch(chatMember);
+				}
+			};
+			btnTglReachableTropo.setOnAction(new EventHandler<ActionEvent>() {
+				@Override
+				public void handle(ActionEvent actionEvent) {
+					if (btnTglReachableTropo.isSelected()) {
+						chatcontroller.getLst_chatMemberListFilterPredicates().add(reachableTropoPredicate);
+					} else {
+						chatcontroller.getLst_chatMemberListFilterPredicates().remove(reachableTropoPredicate);
+					}
+				}
+			});
+			btnTglReachableTropo.setTooltip(new Tooltip("Show stations with non-negative SSB tropo margin. Pending/failed calculations stay visible."));
+
+			ToggleButton btnTglNewBands = new ToggleButton("New bands");
+			Predicate<ChatMember> newBandsPredicate = new Predicate<ChatMember>() {
+				@Override
+				public boolean test(ChatMember chatMember) {
+					return isNewBandOpportunity(chatMember);
+				}
+			};
+			btnTglNewBands.setOnAction(new EventHandler<ActionEvent>() {
+				@Override
+				public void handle(ActionEvent actionEvent) {
+					if (btnTglNewBands.isSelected()) {
+						chatcontroller.getLst_chatMemberListFilterPredicates().add(newBandsPredicate);
+					} else {
+						chatcontroller.getLst_chatMemberListFilterPredicates().remove(newBandsPredicate);
+					}
+				}
+			});
+			btnTglNewBands.setTooltip(new Tooltip("Show stations that are QRV on a known active band that has not been worked yet"));
+
+			ToggleButton btnTglAsNext5Min = new ToggleButton("AS next 5m");
+			Predicate<ChatMember> asNext5MinPredicate = new Predicate<ChatMember>() {
+				@Override
+				public boolean test(ChatMember chatMember) {
+					return hasAsWindowInNextMinutes(chatMember, 5);
+				}
+			};
+			btnTglAsNext5Min.setOnAction(new EventHandler<ActionEvent>() {
+				@Override
+				public void handle(ActionEvent actionEvent) {
+					if (btnTglAsNext5Min.isSelected()) {
+						chatcontroller.getLst_chatMemberListFilterPredicates().add(asNext5MinPredicate);
+					} else {
+						chatcontroller.getLst_chatMemberListFilterPredicates().remove(asNext5MinPredicate);
+					}
+				}
+			});
+			btnTglAsNext5Min.setTooltip(new Tooltip("Show stations with any AirScout window now or within the next 5 minutes"));
+
 			ToggleButton tglBtnQRBEnable = new ToggleButton("Show only QRB [km] <= ");
 			tglBtnQRBEnable.selectedProperty().addListener(new ChangeListener<Boolean>() {
 				Predicate<ChatMember> maxQrbPredicate = new Predicate<ChatMember>() {
@@ -6337,6 +6443,29 @@ public class Kst4ContestApplication extends Application implements StatusUpdateL
 
 			HBox chatMemberTableFilterWorkedBandFiltersHbx = new HBox();
 
+
+			ComboBox<String> cmbReachabilityBand = new ComboBox<>();
+			cmbReachabilityBand.getItems().add("Auto");
+			for (Band band : chatcontroller.getReachabilityService().getEnabledStationBands()) {
+				cmbReachabilityBand.getItems().add(band.getDisplayLabel());
+			}
+			cmbReachabilityBand.getSelectionModel().select("Auto");
+			cmbReachabilityBand.setTooltip(new Tooltip("Reachability band for Tropo column/filter. Auto uses the station's lowest session band."));
+			cmbReachabilityBand.setOnAction(new EventHandler<ActionEvent>() {
+				@Override
+				public void handle(ActionEvent event) {
+					selectedReachabilityBandOverride = parseReachabilityBandSelection(cmbReachabilityBand.getValue());
+					for (ChatMember member : chatcontroller.getLst_chatMemberList()) {
+						Band bandToCalculate = resolveReachabilityBandForUi(member);
+						chatcontroller.getReachabilityService().ensureTropoMarginCalculated(member, bandToCalculate);
+					}
+					chatcontroller.fireUserListUpdate("Reachability band changed");
+				}
+			});
+
+			chatMemberTableFilterWorkedBandFiltersHbx.getChildren().add(new Label("Reachability:"));
+			chatMemberTableFilterWorkedBandFiltersHbx.getChildren().add(cmbReachabilityBand);
+
 			ToggleButton btnTglwkd = new ToggleButton("wkd");
 
 			Predicate<ChatMember> wkdPredicate = new Predicate<ChatMember>() {
@@ -6602,6 +6731,14 @@ public class Kst4ContestApplication extends Application implements StatusUpdateL
 					"-fx-border-radius: 1;" +
 					"-fx-border-color: lightgrey;");
 
+
+			chatMemberTableFilterWorkedBandFiltersHbx.getChildren().addAll(
+					btnTglNewLocator,
+					btnTglReachableTropo,
+					btnTglNewBands,
+					btnTglAsNext5Min
+			);
+
 //			chatMemberTableFilterWorkedBandFilters
 
 
@@ -7895,8 +8032,15 @@ public class Kst4ContestApplication extends Application implements StatusUpdateL
 
 		// Unconditionally add listener to manually sync the textfield input to the button 
 		// (this listener also fires correctly when the value is updated by the binding)
+//		txt_ownqrgMainCategory.textProperty().addListener((observable, oldValue, newValue) -> {
+//			MYQRGButton.textProperty().set(newValue);
+//		});
 		txt_ownqrgMainCategory.textProperty().addListener((observable, oldValue, newValue) -> {
-			MYQRGButton.textProperty().set(newValue);
+			if (Platform.isFxApplicationThread()) {
+				MYQRGButton.textProperty().set(newValue);
+			} else {
+				Platform.runLater(() -> MYQRGButton.textProperty().set(newValue));
+			}
 		});
 
 		// That's the default behaviour of the myqrg textfield
@@ -9702,6 +9846,164 @@ public class Kst4ContestApplication extends Application implements StatusUpdateL
 		stage.setHeight(correctedHeight);
 	}
 
+	/**
+	 * Resolves the currently selected UI reachability band. Null override means Auto.
+	 *
+	 * @param member station row
+	 * @return manually selected band or automatic band
+	 */
+	private Band resolveReachabilityBandForUi(ChatMember member) {
+		if (selectedReachabilityBandOverride != null) {
+			return selectedReachabilityBandOverride;
+		}
+		return chatcontroller.getReachabilityService().resolveAutoBand(member);
+	}
+
+	/**
+	 * Parses the reachability ComboBox selection.
+	 *
+	 * @param selectedLabel selected UI text
+	 * @return selected band, or null for Auto
+	 */
+	private Band parseReachabilityBandSelection(String selectedLabel) {
+		if (selectedLabel == null || selectedLabel.isBlank() || "Auto".equalsIgnoreCase(selectedLabel)) {
+			return null;
+		}
+
+		for (Band band : Band.values()) {
+			if (selectedLabel.equalsIgnoreCase(band.getDisplayLabel())) {
+				return band;
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * Formats the projected priority score for the station table.
+	 *
+	 * @param member station row
+	 * @return score text
+	 */
+	private String formatPriorityScore(ChatMember member) {
+		if (member == null || !Double.isFinite(member.getCurrentPriorityScore())) {
+			return "-";
+		}
+		return String.format(Locale.US, "%.0f", member.getCurrentPriorityScore());
+	}
+
+	/**
+	 * Parses a numeric table value for custom score sorting.
+	 *
+	 * @param value table text
+	 * @return parsed value or negative infinity for missing values
+	 */
+	private double parseTableDouble(String value) {
+		if (value == null || value.isBlank() || value.equals("-") || value.startsWith("- @")) {
+			return Double.NEGATIVE_INFINITY;
+		}
+
+		String normalized = value.replace(",", ".").replace("+", "").trim();
+		int firstSpace = normalized.indexOf(' ');
+		if (firstSpace > 0) {
+			normalized = normalized.substring(0, firstSpace);
+		}
+
+		try {
+			return Double.parseDouble(normalized);
+		} catch (NumberFormatException ignored) {
+			return Double.NEGATIVE_INFINITY;
+		}
+	}
+
+	/**
+	 * Predicate helper for the tropo filter. Pending or failed calculations remain
+	 * visible as requested; only finite negative margins are hidden.
+	 *
+	 * @param member station row
+	 * @return true if station should remain visible under the tropo filter
+	 */
+	private boolean isReachableViaTropoFilterMatch(ChatMember member) {
+		if (member == null || chatcontroller.getReachabilityService() == null) {
+			return true;
+		}
+
+		Band selectedBand = resolveReachabilityBandForUi(member);
+		chatcontroller.getReachabilityService().ensureTropoMarginCalculated(member, selectedBand);
+
+		OptionalDouble marginDb = member.getTropoSsbMarginDb(selectedBand);
+		if (marginDb.isEmpty() || !Double.isFinite(marginDb.getAsDouble())) {
+			return true;
+		}
+
+		return marginDb.getAsDouble() >= 0.0;
+	}
+
+	/**
+	 * Returns true when a station has any AirScout window now or within maxMinutes.
+	 *
+	 * @param member station row
+	 * @param maxMinutes look-ahead window
+	 * @return true if any AS window is available
+	 */
+	private boolean hasAsWindowInNextMinutes(ChatMember member, int maxMinutes) {
+		if (member == null || member.getAirPlaneReflectInfo() == null
+				|| member.getAirPlaneReflectInfo().getRisingAirplanes() == null) {
+			return false;
+		}
+
+		return member.getAirPlaneReflectInfo().getRisingAirplanes().stream()
+				.filter(Objects::nonNull)
+				.anyMatch(airPlane -> airPlane.getArrivingDurationMinutes() >= 0
+						&& airPlane.getArrivingDurationMinutes() <= maxMinutes);
+	}
+
+	/**
+	 * Returns true when the station is known to be QRV on at least one enabled own band
+	 * that has not been worked yet.
+	 *
+	 * @param member station row
+	 * @return true if there is a new-band opportunity
+	 */
+	private boolean isNewBandOpportunity(ChatMember member) {
+		if (member == null || chatcontroller.getReachabilityService() == null
+				|| member.getKnownActiveBands() == null || member.getKnownActiveBands().isEmpty()) {
+			return false;
+		}
+
+		EnumSet<Band> enabledBands = chatcontroller.getReachabilityService().getEnabledStationBands();
+		for (Band band : member.getKnownActiveBands().keySet()) {
+			if (band != null && enabledBands.contains(band) && !isWorkedOnBand(member, band)) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Maps the existing per-band worked flags to the Band enum.
+	 *
+	 * @param member station row
+	 * @param band band to inspect
+	 * @return true if worked on that band
+	 */
+	private boolean isWorkedOnBand(ChatMember member, Band band) {
+		if (member == null || band == null) {
+			return false;
+		}
+
+		switch (band) {
+			case B_144: return member.isWorked144();
+			case B_432: return member.isWorked432();
+			case B_1296: return member.isWorked1240();
+			case B_2320: return member.isWorked2300();
+			case B_3400: return member.isWorked3400();
+			case B_5760: return member.isWorked5600();
+			case B_10G: return member.isWorked10G();
+			case B_24G: return member.isWorked24G();
+			default: return false;
+		}
+	}
+
 }
 
 /**

udpReaderBackup.txt

@@ -2365,4 +2365,5 @@ OZ1DLD/P;Bent;JO45SK;StringProperty [value: 144.285]; wkd true; wkd144 true; wkd
 OZ1FDH;Claus;JO55QX;StringProperty [value: null]; wkd true; wkd144 true; wkd432false; wkd1240false; wkd2300false; wkd3400false; wkd5600false; wkd10Gfalse ; 2: 144/432 MHz
 OZ7KJ;Skive Club;JO46ML;StringProperty [value: 144.225]; wkd true; wkd144 true; wkd432false; wkd1240false; wkd2300false; wkd3400false; wkd5600false; wkd10Gfalse ; 2: 144/432 MHz
 SM7VUK;Bengt;JO66LI;StringProperty [value: 144.304]; wkd true; wkd144 true; wkd432false; wkd1240false; wkd2300false; wkd3400false; wkd5600false; wkd10Gfalse ; 2: 144/432 MHz
-OZ1HDF;Ken;JO55UN;StringProperty [value: null]; wkd true; wkd144 true; wkd432false; wkd1240false; wkd2300false; wkd3400false; wkd5600false; wkd10Gfalse ; 2: 144/432 MHz
+OZ1HDF;Ken;JO55UN;StringProperty [value: null]; wkd true; wkd144 true; wkd432false; wkd1240false; wkd2300false; wkd3400false; wkd5600false; wkd10Gfalse ; 2: 144/432 MHz
+DO5SA;unknown;unknown;StringProperty [value: null]; wkd true; wkd144 true; wkd432false; wkd1240false; wkd2300false; wkd3400false; wkd5600false; wkd10Gfalse ; null