Sat link and "pings"
It has been reported that last sat contact was 8:11AM MYT (00:11 UTC) and loss of SSR occurred at ~01:21AM MYT (17:21 UTC). That is an elapsed time of just under 7 hours. If there was an hourly data link connection request (ISO-8208 CALL REQUEST) aka "ping" sent from AES (aircraft) to GES (ground) via satellite there should be a minimum of 6 maps like the one we have seen, each showing the a/c position at a different angle from the satellite (unless it was flying along the arc which is highly unlikely). By comparing the arc of probability of each hourly sat comm one should be able to determine if the a/c was moving NW or SW.
With respect to a fix from 2 sats there is reason to think the a/c flew W from the point of LOC so it could have flown out of range of the POR satellite before the next hourly ping. This may be reading too much into the little info about the sat coms but if the data link requests are truly timed hourly then one can reason backward from last sat contact at +11 to the last sat contact prior to LOC occurring at 17:11 UTC. That gives the a/c 50 minutes to fly westward and out of POR range.
Please disprove this line of reasoning...