In article <[EMAIL PROTECTED]>, "John Allen <allen{at}vo{dot}lu>" wrote:

> To satisfy my curiosity without effort on my part, can someone tell me where 
> the GPS 
> satellites actually get their time from?

They each have an atomic clock on board.  A ground station in America
measures their time and compares it against a time traceable to UTC by
non-GPS means and sends corrections to the satellite.

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