[time-nuts] Re: moving optical clocks to test Einstein's general relativity

[Magnus Danielson]

Cesium, not very good. Optical, sure.

The tidal wave shift of 3 dm requires the optical clocks, but it also 
needs comparison with optical clock significantly different longitudal 
or latitudal positions. The optical links of today is useful at their 
10^-18 to 10^-19 floor. There is enough links in Europe between optical 
clocks to maybe see this. They are about to connect INRIM to the French 
grid, which leads up to SYRTE, shoots of to NPL and PTB. It will be 
interesting to see if they see the 12h:is component in their data. I 
will ask.

Cheers,
Magnus

On 2023-11-09 16:12, john.haine--- via time-nuts wrote:
> This raises an interesting question - will this be sensitive enough to
> detect tidal changes in gravity?  Indeed, are caesium clocks able to do
> this?  We know of at least two pendulum clocks that could - the Shortt Free
> Pendulum and the Fedchenko.
>
> -----Original Message-----
> From: Eric Scace via time-nuts <time-nuts at lists.febo.com>
> Sent: Tuesday, November 7, 2023 2:57 AM
> To: Time Nuts email list <time-nuts at lists.febo.com>
> Cc: Eric Scace <eric at scace.org>
> Subject: [time-nuts] moving optical clocks to test Einstein's general
> relativity
>
> Updating the TVB mountaintop experiments with optical clocks on the
> continental divide here in Colorado...
>
> <https://www.colorado.edu/ecee/2023/11/01/researchers-test-einsteins-predict
> ions-general-relativity-atop-rocky-mountains>
>
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