BDS50 if GS > 600 kts it is probably invalid as BDS50 message

terminal2 · Nov 15, 2020 · 580d944 · 580d944
1 parent b16aba5
commit 580d944
Showing 1 changed file with 10 additions and 3 deletions.
diff --git a/src/main/java/aero/t2s/modes/decoder/df/bds/Bds50.java b/src/main/java/aero/t2s/modes/decoder/df/bds/Bds50.java
@@ -168,9 +168,16 @@ public Bds50(short[] data) {
  trueTrack = trueTrack * TRUE_TRACK_ANGLE_ACCURACY + (isWest ? 180d : 0d);
 
  gs = ((data[7] << 2) | ((data[8] >>> 6) & 0x3)) * SPEED_ACCURACY;
- if (!statusGs && gs != 0) {
- invalidate();
- return;
+ if (statusGs) {
+ if (gs > 600) {
+ invalidate();
+ return;
+ }
+ } else {
+ if (gs != 0) {
+ invalidate();
+ return;
+ }
  }
 
  boolean isTrackAngleRateNegative = (data[8] & 0b00010000) != 0;