I find it pretty unsettling that in 2016 it is still not possible to track transoceanic flights using
flightaware, because of lack of coverage.
When the unfortunate MH370 accident occurred, I stumbled upon news of the British company Inmarsat launching, or discussing the launch of, a series of satellites to help track transoceanic flights anywhere in the World, that could also be useful to determine vertical separation.
Quite a few months have passed and I seem to have lost track of this. So I am here to ask those who know more about it:
what are the recent developments in the satellite-based tracking of aircraft?