Originally Posted by
threemiles
It is Ground Speed indeed. It comes in a packet called Velocity from which Ground Speed and True Track can be derived.
No further speculations on the values, could be a number of reasons.
I think it depends on whether the FR24 data is derived from ADS-B or Multi-Lateration (MLAT)… GS is calculated simply by time between horizontal fixes…
https://www.flightradar24.com/blog/h...hts-with-mlat/