Read this little blurb that explained it really well, too:
...GPS satellites are all singing the same song in time. The trick is that this song takes x amount of time to reach you. This means that a satellite that is further away will seem to you to be at a later point in the song to one that is close by. Your GPS unit can tell your position by comparing which satellite is up to which point in the song. So if satellite A is 5 seconds into the song and satellite B is 10 seconds into the song your GPS unit knows that you are much closer to satellite A.
I just enjoyed the heck out of the 'singing satellites' idea.
Dude, that was well said. Going to read a bit more about the tech involved and how it works.
Read this little blurb that explained it really well, too:
I just enjoyed the heck out of the 'singing satellites' idea.