"FlightAware and Aireon are proud to announce the world's first and only global, space-based ADS-B flight tracking solution. FlightAware's technology and Aireon's 66 ADS-B receivers in low earth orbit will forever change the world of flight tracking and flight safety. (flightaware.com)"

https://flightaware.com/aireon/

This will be a direct competitor to Delorme InReach and Spot tracking services used by sailplane pilots today

....of course... you'll have to have ADS-B out installed. But, depending on the cost of this service, it could ultimately be less expensive than paying $250-$400 per year for Delorme (However.. it might be more expensive!). My Trig T22 equipped glider can probably be upgraded to ADS-B out for $600. It has to be checked every two years by an avionics shop (but that should be done for the Mode S transponder anyway).

Walt Rogers WX