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I had my eye on a rubidium clock for a disaster prepper navigator's
atomic  chronometer

eg 
http://www.ebay.co.uk/itm/1PC-Used-FE-5680A-10MHz-High-Precision-Rubidium-Atomic-Clock-In-Good-Condition-/322371597200?hash=item4b0ed83390:g:dJ0AAOSw-0xYYmku

Plenty of web sites on projects to make a clock using one of these and
an Arduino. I was also thinking you could do satellite a little
differently with your own atomic clock.

Bill

On 22 February 2017 at 17:03, Jim Hickey  wrote:
> Check out the Hoptroff No. 10.
>
> http://www.hoptroff.com/collections/atomic-timepieces/products/no-10
>
> Their run of the mill standard atomic watches not too shabby either.
>
> 



--
Professor of Applied Mathematics
http://www.maths.manchester.ac.uk/bl

   

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