Re: end UK dependance on GPS?
I was just about to ask the same question.
I always thought that the whole purpose of having the signals beamed from satellites was that you could triangulate from the three known coordinates, and the only reason for the clock signals was to measure the tiny variances in the time taken for the signals to reach the receiver.
So how does having your own portable clock absolve the need for the satellite signals? How doe the unit triangulate?