[time-nuts] GPS Antenna on Tower.

Attila Kinali attila at kinali.ch
Wed Jun 21 04:26:35 EDT 2017

On Tue, 20 Jun 2017 16:34:14 +0000
Mark Sims <holrum at 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.   

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

> 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   

This might be of interest:
(more papers available upon request)

> 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.


			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

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