[ntp:questions] GPS? Time problems?

David J Taylor david-taylor at blueyonder.delete-this-bit.and-this-part.co.uk.invalid
Sun Dec 27 20:58:51 UTC 2009


"unruh" <unruh at wormhole.physics.ubc.ca> wrote in message 
news:slrnhjfdes.skf.unruh at wormhole.physics.ubc.ca...
> Suddenly my system, connected to a gps source (GPS18lvc) has a much
> larger standard deviation than before, and ntp is oscillating ( the rate
> oscillates about once an hour with a .01PPM amplitude). (See
> www.theory.physics.ubc.ca/chrony/chrony.html and look at the graph for
> string near the bottom of the graphs for all the clocks.) The offsets
> are fluctuating by about plus or minux 10 usec.  Nothing changed
> in ntp ( version4.2.4p15), the gps receiver,...
> Ie, this just suddenly started. Anyone seen any problems with gps in the
> past few days?

Not with my three PCs - Feenix, Stamsund and Bacchus:

  http://www.satsignal.eu/mrtg/daily_ntp.html

but I'm not looking at the 10us level.

Cheers,
David 




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