@hamster3null (#8555, 28 Mar 2014, 02:13)
Excellent spreadsheet!
The problem is made harder by having two sources of Doppler -- aircraft motion and satellite motion.
Even for a stationary satellite, the problem is still hard because of the unknown aircraft velocity vector orientation.
So all one can do is hypothesize a set of aircraft positions and velocities, and look for a decent fit to the measurements.
INMARSAT or AAIB must have done something quite similar.