[ntp:questions] Accuracy of GPS satellite signal ?
Richard B. Gilbert
rgilbert88 at comcast.net
Sun Jan 28 15:59:47 UTC 2007
John Allen wrote:
> Richard B. Gilbert wrote:
>> It should not matter which satellites your site is using, they all
>> keep the same time to within nanoseconds!
> To satisfy my curiosity without effort on my part, can someone tell me
> where the GPS satellites actually get their time from?
> John Allen
> Bofferdange, Luxembourg
The Navstar (GPS) satellites have atomic clocks (cesium) on board.
These clocks are monitored and controlled by a ground station.
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