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.

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 holrum@hotmail.com wrote:

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 Tue, 20 Jun 2017 16:34:14 +0000
Mark Sims holrum@hotmail.com wrote:

Cool! How do you calculate the displacement on a fixed position receiver?

This might be of interest:
http://www.unoosa.org/documents/pdf/psa/activities/2012/un-latvia/ppt/2-11.pdf
(more papers available upon request)

:-D

		Attila Kinali

--
It is upon moral qualities that a society is ultimately founded. All
the prosperity and technological sophistication in the world is of no
use without that foundation.
-- Miss Matheson, The Diamond Age, Neil Stephenson

Mark,

Excuse my ignorance but where do I find this version?

Wes

On 6/20/2017 9:34 AM, Mark Sims wrote: