Additional DF18 Airborne position data.

Author: IDBeswick

src/main/java/aero/t2s/modes/decoder/df/DF18.java

@@ -15,6 +15,22 @@ public DF18 decode() {
         int typeCode = data[4] >>> 3;
 
         switch (typeCode) {
+            case 0:
+            case 9:
+            case 10:
+            case 11:
+            case 12:
+            case 13:
+            case 14:
+            case 15:
+            case 16:
+            case 17:
+            case 18:
+            case 20:
+            case 21:
+            case 22:
+                extendedSquitter = new AirbornePosition(data, getIcao());
+                break;
             case 1:
             case 2:
             case 3:

src/main/java/aero/t2s/modes/decoder/df/df17/data/SurfaceOperationalMode.java

@@ -27,7 +27,7 @@ public SurfaceOperationalMode(int data) {
         acasRA = (data & 0b0010000000000000) != 0 ? AcasState.RA_ACTIVE : AcasState.RA_NOT_ACTIVE;
         acasIdent = (data & 0b0001000000000000) != 0;
         singleAntennaFlag = (data & 0b0000010000000000) != 0;
-        systemDesignAssurance = SourceIntegrityLevel.from((data & 0b0000001100000000) >>> 7);
+        systemDesignAssurance = SourceIntegrityLevel.from((data & 0b0000001100000000) >>> 8);
         int gpsAntennaOffset = (data & 0b0000000011111111);
 
         gpsLateralOffset = (gpsAntennaOffset & 0b11100000) >>> 5;