Re: It Could Be Made to Work ???
I find it hard to see how it could possibly be made to work. For a start: don't all GPS spacecraft carry an atomic clock? None of those launched so far have one, surely. And you would need to make a system that was extremely similar to GPS (as the Glonass and the new Chinese ones are) and use an adjacent waveband, otherwise existing chips in GPS receivers and mobile phones around the world simply won't work on them. And then you need a set of ground stations to track their position and upload the orbital data to them at quite frequent intervals. With a couple of dozen spacecraft in highish orbits that's feasible, though surely not cheap to do. With a vast number of low-earth orbit spacecraft that will surely just not be doable at any reasonable cost. Or have I missed something?
Biting the hand that feeds IT
