Originally Posted by
DaveReidUK
Thanks, that's a useful exposition.
One point of potential confusion:
Downlinked Aircraft Parameters (DAPs) aren't actually part of ADS-B. Both are sent via the ATC transponder, but DAPs only in response to interrogation from the ground, whereas ADS-B is broadcast ("squittered") continuously.
Technically, absolutely correct of course, but however you may look at it in this context, emitted by the airframe and not interfered with by humans (put cyber to one side) and able to be consumed by the atm system as part of the service design … that was my point, thanks for the clarification.