Quote:
Originally Posted by Legbreaker
The difference may only be tiny fractions of a second but that can translate to tens, even hundreds of metres of error accumulating daily without the ground station updates.
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For reference:
"One of the most significant error sources is the GPS receiver's clock. Because of the very large value of the speed of light, c, the estimated distances from the GPS receiver to the satellites, the pseudoranges, are very sensitive to errors in the GPS receiver clock; for example an error of one microsecond (0.000 001 second) corresponds to an error of 300 metres (980 ft)."
http://en.wikipedia.org/wiki/Gps#Cor...iver.27s_clock