[ntp:questions] Accuracy of GPS satellite signal ?

Richard Eich richard.eich at domain.invalid
Fri Jan 26 20:43:18 UTC 2007


david-taylor at blueyonder.co.not-this-bit.nor-this-part.uk wrote...
> Richard Eich wrote:
> > If I were to set up five or six global locations, each time-
> > synchronized to a local GPS receiver, how much variability would I
> > expect there to be between the time as indicated by the GPS
> > satellites used by each local GPS receiver.
> >
> > I'm happy to click on a link and do my own reading.  Just haven't
> > been able to find the right link yet (still looking, though).
> >
> > Thx
> 
> I'm sure there will be more complete answer, but I would have thought that 
> tens of microseconds was the order you would see from a PPS-synced NTP 
> server.  This is based on my own very simple and very old [PC] setup.  You 
> should be able to do better than this:
> 
>   http://www.david-taylor.myby.co.uk/mrtg/pixie_ntp.html
> 
> GPS alone would be microseconds, if not better.
> 
> Cheers,
> David 

Thanks, David.




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