[ntp:questions] NTP absolute accuracy?

David J Taylor david-taylor at blueyonder.not-this-bit.nor-this.co.uk.invalid
Sun Nov 1 18:10:30 UTC 2009

"Unruh" <> wrote in message news:vCjHm.50153$Db2.9407 at edtnps83...
>>UK 60KHz radio time signal.
> Ah, OK. Its accuracy is probably not much better than a few msec I 
> assume.
> GPS is a few usec. Since the network gives accuracies of better than a 
> few ms, MSF
> is not a good way of testing the accuracy of network set clocks.

At source, it's recently been within about 10 microseconds:



In the field, the accuracy will depend on the receiver you use, the 
propagation, and the quality of signal you have.  A few milliseconds is 
probably a fair estimate, although it would be interesting to see some 
measured values.


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