atomic clock / radio-receiver chip

[Rodolphe Ortalo]

IHMO, Doris and Poséidon precision is also pretty astounding, albeit not
so well-known ( http://en.wikipedia.org/wiki/DORIS_(geodesy) .

Rodolphe

Le dimanche 01 juin 2008 à 23:04 +0200, Philippe Guillebert a écrit :
> cdr wrote:
> > the atomic clock(s) arent orbiting the earth,
> 
> Hey,
> 
> According to wikipedia ( http://en.wikipedia.org/wiki/GPS ), every GPS 
> satellite carries an atomic clock, providing every receiver on earth 
> with really precise clock. The radio clock systems you describe are 
> different and kinda useless when you have GPS onboard.
> 
> As an engineer I'm stunned by the level of performance achieved of the 
> GPS system : the description of Einstein's relativity compensation on 
> the WP article is really scary :)
> 
>