[ntp:questions] NMEA ref.clock better than my ISP's timeserver?
david at ex.djwhome.demon.co.uk.invalid
Fri May 29 06:45:53 UTC 2009
Richard B. Gilbert wrote:
> It doesn't "compensate"! It simply tells you the maximum uncertainty
> introduced in transmitting the request and reply. You know that it
> can't be worse than one half of the round trip time. All other things
> being equal, the lowest round trip time gives you the best time.
It does compensate. However the degree of compensation may be wrong by
anywhere between + and - half the round trip time.
The compensation is added to the time estimates, but is also added to
the error bound calculation.
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