[time-nuts] What's the time Mr Wolf...

[Tom Van Baak]

> If gravity affects frequency, can this effect be seen as a daily
> change in the EFC voltage of a GPS locked standard as caused by the
> Moon? Does this also affect the frequency of the atomic standards used
> to measure time? All this must make the measuring of absolute
> frequency to the high orders of accuracy quite complex.

Yes, very complex. No, you won't see it in something like a
GPSDO. The effect you're talking about here is thousands
to millions of times less than what you can measure.

12 hour or diurnal effects in a GPSDO are very common, but
they are due to local temperature, GPS orbits, multipath, etc.

/tvb