Originally Posted by Communicator
... what is our basis for thinking that this is ACTUALLY happening in the Aero Classic units?
Just read the notes on pages 1 & 2 of the Inmarsat data release. In part -
Inmarsat Classic Aero mobile terminals are designed to correct for Doppler effects on their transmit signals. The terminal type used on MH370 assumes a stationary satellite at a fixed position.
The permanent offset you are referring to, is as a result of Inmarsat creating a "nominal terminal" outside of the satellite.