Hi Earth tides are at least as crazy a topic as time. There are formulas that will let you incorporate the effect of Pluto on solid Earth tides.
Bob > On Jun 20, 2017, at 7:21 PM, Peter Vince <petervince1...@gmail.com> wrote: > > Hi Mark, > > This is all new information to me - and fascinating! Have you just > "calculated" the offsets (using known values from somewhere), or "measured" > it by very long term averaging of the GPS position information? > > Peter Vince > > > On 20 June 2017 at 17:34, Mark Sims <hol...@hotmail.com> wrote: > >> I just added the ability to calculate solid earth tides and the vertical >> gravity offset due to the sun and moon to Lady Heather. The lat/lon >> offset is typically around +/- 60 cm per day. Vertical offset is around >> +/- 180mm. Depending upon the day and where you are, the swings are not >> symmetrical around 0.0 >> >> Solid earth tides are a BIG factor in precision geodesy. Gravity offset >> is a big issue for precision pendulum nuts. If your pendulum clock cannot >> detect gravity offsets (very few can) it's not nutty enough. >> >> The attached plot shows around 5 days of data. >> > _______________________________________________ > 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.