Pingology....
Further to my #10413 .......did some trig. and found that the satellite should have been on a bearing of 73.17 degrees to port as MH370 was on climbout ........so in fact they were flying partly toward the sat. so it looks increasingly likely that Inmarsat got it wrong and their chart is actually indicating the opposite sense......ie .up is towards the satellite , increasing any doppler shift .....and vice versa......