Malaysian Airlines MH370 contact lost

[brika]

Pings getting longer

Assuming longer meaning distance...
(and applying to southern red line)

..if a/c climbed back to FL350 or so and then, for whatever reason, descended gradually along the same path...pings would get longer as the a/c would be increasing it's distance from the satellite (direct line of comm at lower altitude=further from sat)(but further u are from sat, the smaller the difference becomes)

One possibility.

The other would be.... flying away, directly or tangentially, from satellite...and, if descending, would make pings even longer.

Just a thought.

Note: timestamping errors as mentioned by hamster3null #7286 would be an added problem for calculations.