I couldn’t find any heading data in the MSG records from a dump1090 feed. The specs indicate that the Field 14 is for Track which is derived from the horizontal and vertical velocities. Is there any data field for heading? I’m not seeing any MSG4 records (perhaps these are sent at intervals that I did not trap).
The original source code does not have comments on heading data (only on Track that I noted above). Any guidance on estimating heading (other than using intermediate computation using successive coordinates) would be appreciated.
Also, is there an Easter Egg with JSON output on port 8080 under certain conditions?