Originally Posted by
mbriscoe
But the time on the data is that added when it was transmitted, not when it was received or sent by the server.
Then it's even less likely to be synchronised across different receivers. The basic ADS-B data that most of them supply to FR24 is timestamped by using the PC's clock. We all know how accurate those are.
How else do you account for the wild variations in speed and VS? For example between 04:13:00.0Z and 04:13:00.6Z the three sources reported the groundspeed variously as 404kts, 398kts and 347kts. That's a longitudinal deceleration of around 5g.
