Originally Posted by hamster3null
Incidentally, do you have any idea what, if anything, other than temporary loss of power / reboot, could cause the aircraft to send 3 packets in 18:27 to 18:29 as it was turning?
Without going back and checking the spec; it is possible this particular SATCOM installation was also equipped with IRS ability to compute the satellite position and therefor calculate the doppler shift. The rate of doppler change may well have triggered an AES to GES packet, if the the P channel hadn't already done so.