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V5 fixes #46

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V5 fixes #46

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40e3457
Correct altitude type for FTC 0
fixje Mar 17, 2026
20eab1d
TCAS Resolution Advisory only for v2
fixje Mar 17, 2026
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4 changes: 2 additions & 2 deletions src/main/java/de/serosystems/lib1090/StatefulModeSDecoder.java
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Original file line number Diff line number Diff line change
Expand Up @@ -173,9 +173,9 @@ public ModeSDownlinkMsg decode(ModeSDownlinkMsg modes, long timestamp) throws Ba
if (ftc == 28) { // aircraft status message, check subtype
int subtype = es1090.getMessage()[0] & 0x7;

if (subtype == 1) // emergency/priority status
if (subtype == 1)
return new EmergencyOrPriorityStatusMsg(es1090);
if (subtype == 2) // TCAS resolution advisory report
if (subtype == 2 && dd.adsbVersion > 1)
return new TCASResolutionAdvisoryMsg(es1090);
}

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2 changes: 1 addition & 1 deletion src/main/java/de/serosystems/lib1090/msgs/adsb/AirbornePositionV0Msg.java
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Expand Up @@ -247,7 +247,7 @@ public Integer getAltitude() {

@Override
public Position.AltitudeType getAltitudeType () {
if (getFormatTypeCode() >= 9 && getFormatTypeCode() <= 18)
if (getFormatTypeCode() == 0 || (getFormatTypeCode() >= 9 && getFormatTypeCode() <= 18))
return Position.AltitudeType.BAROMETRIC_ALTITUDE;
else if (getFormatTypeCode() >= 20 && getFormatTypeCode() <= 22)
return Position.AltitudeType.ABOVE_WGS84_ELLIPSOID;
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2 changes: 1 addition & 1 deletion src/main/java/de/serosystems/lib1090/msgs/adsr/AirbornePositionV0Msg.java
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Expand Up @@ -229,7 +229,7 @@ public Integer getAltitude() {

@Override
public Position.AltitudeType getAltitudeType () {
if (getFormatTypeCode() >= 9 && getFormatTypeCode() <= 18)
if (getFormatTypeCode() == 0 || (getFormatTypeCode() >= 9 && getFormatTypeCode() <= 18))
return Position.AltitudeType.BAROMETRIC_ALTITUDE;
else if (getFormatTypeCode() >= 20 && getFormatTypeCode() <= 22)
return Position.AltitudeType.ABOVE_WGS84_ELLIPSOID;
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