[time-nuts] Long period variation of GPS PPS timing?

asmagal at fc.up.pt asmagal at fc.up.pt
Thu Jul 1 09:05:50 EDT 2010


Hello!

If considered useful, I can send you the yesterday record of my GPS
TBolt #2 against DCF77, which apparently doesn't show any periodic
phase variation. The VLF receiver is a Tracor 599K and the chart
span is 10 uS. If there was such a variation it should be clearly
visible.

Antonio
CT1TE

Quoting Peter Vince <pvince at theiet.org>:

> Hi Paul,
>
>      Others on this list will reply more authoritatively, but I don't
> believe that cyclic variability is GPS - I've not noticed such a thing
> on any of the systems I monitor.  Can you carefully monitor
> temperature and PSU voltage, and maybe find a correlation there?
>
>      Peter
>
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