[The_Double]

How does it solve for time without location? With GPS location and time are one solution to an equation with 4 unknowns (x,y,z,t). Without location you won't know the time delay between you and the transmitter.

[fnordpiglet]

The the transmitters are of fixed terrestrial locations.

[michaelt]

So you set your clock up by telling it its own location, so it can offset for the signal's flight time?

[rocqua]

No, you tell it the location of multiple towers it receives signals from, then it can compute the unique solution x, y, z, t

[brookst]

But the comment several levels up said they were demoing time with a single tower.

[mcculley]

You can get time with a single tower, but not location.

[brookst]

How do you know time of flight for the signal? Tower sends its coordinates, client uses GPS?

[namibj]

The satellites are on known positions too, once you know the time.