Originally Posted by
Airbubba
It looks like the ADS-B was certainly sending out positions for a while, it probably defaults to IRS or whatever it's called on a B-738 if GPS is not available. Cue DaveReidUK, he would possibly know.
I would be very surprised if the ADS-B data sent from the flight wasn't GPS derived.
And equally surprised if the abrupt end of transmissions from the aircraft didn't coincide with the missile strike, give or take a second or so.