OptionalcallsignCurrent callsign, as available from the source (e.g. "UAL123").
OptionalcategoryAircraft category code for performance/weight class.
OptionaldestinationDestination airport information.
OptionalgroundGround speed in knots.
24-bit ICAO hexadecimal address (e.g. "A0B1C2").
OptionalindicatedIndicated airspeed in knots.
Unix epoch ms last seen timestamp.
OptionalmagneticMagnetic heading in degrees.
OptionalonTrue if aircraft is on the ground.
OptionaloriginOrigin airport information.
OptionalpositionCurrent geospatial position.
OptionalregistrationResolved aircraft registration details (N-number, make/model, etc.).
OptionalsquawkSquawk transponder code.
OptionaltrueTrue airspeed in knots.
OptionaltrueTrack over ground in degrees true.
OptionalverticalVertical rate in feet per minute.
Normalized flight state object for ADS-B/Mode-S tracking, used across packages.