As I recall, the lunar gravity force is on the order of a few ppm of "g" (and I assume solar force is comparable).
So, the period of a pendulum does vary according to the time of day and phase of moon. (about a ppm or so) I seem to recall that acceleration sensitivity of a crystals is on the order of a ppb/g, so the effect on a XO of the moon is down in the 1E-15 range.. Jim > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of M. Warner Losh > Sent: Thursday, October 30, 2008 12:28 PM > To: time-nuts@febo.com; [EMAIL PROTECTED] > Subject: Re: [time-nuts] What's the time Mr Wolf... > > In message: > <[EMAIL PROTECTED]> > "Steve Rooke" <[EMAIL PROTECTED]> writes: > : 2008/10/31 Tom Van Baak <[EMAIL PROTECTED]>: > : > > : >> 11) Extrapolating this, a point on the Equator would be > moving faster > : >> that a point at the poles or even Greenwich, for that > matter. So would > : >> a clock at each location move out of synchronisation > with each other? > : > > The tidal effects are much smaller than those from position. > I don't think that these effects are visible at the 10-14 or > 10-15 level, but since I don't know what level they are > visible at, I can't be sure. > I'm sure that someone on this list, maybe as part of their > PhD thesis, has measured this and can report it :-) > > Warner > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, > go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.