[[ excuse me for linguistic nitpicking ]]
It is not from the ASI, it is satellite derived. However GPS is only one satellite constellation among a handful, better to use the generic term GNSS.
Myself wonder about the reported altitude - I suspect that this will be satellite derived, too, but probably with correction for QNH?
Last edited by Jan Olieslagers; 20th November 2022 at 02:03.