Comment Re:Triangulation (Score 4, Interesting) 132
I used to work on location tech back in the 90s, and one project in our group was getting location of a sat-phone handset (I think this was relating to the newly launched Iridium network). A handset might be only visible to one satellite, but obtaining location was still possible, due to the satellite moving (this method doesn't work with geosynchronous sat-phones). Over a period of time, the satellite moves w.r.t the handset, so with at least two round-trip-time readings, and if you know the location of the satellite, you can get the handset location. Unfortunately that doesn't work for a moving handset in the same way, so this single-tower-location must be using something else (as said, probably beamforming to work out direction + RTT for distance).
WFIW, triangulation is literally taking three angles...