Timestamps - davewalker5/ADS-B-BaseStationReader GitHub Wiki

The following table summarises which date and timestamps are UTC versus local time, with rationale:

Context	Field	Date Type	Comments
AircraftPosition	Timestamp	Local	Records local observation time
Message	Generated	UTC	ADS-B messages use UTC for date and time
Message	LastSeen	UTC	ADS-B messages use UTC for date and time
Sighting	Timestamp	Local	Records local observation time
TrackedAircraft	FirstSeen	Local	Records local observation time
TrackedAircraft	LastSeen	Local	Records local observation time
TrackedAircraft	LookupTimestamp	Local	-
TrackedAircraft	PositionLastUpdated	Local	Only used in the simulator