atomic clock / radio-receiver chip
rodolphe.ortalo at free.fr
Mon Jun 2 15:59:58 CEST 2008
IHMO, Doris and Poséidon precision is also pretty astounding, albeit not
so well-known ( http://en.wikipedia.org/wiki/DORIS_(geodesy) .
Le dimanche 01 juin 2008 à 23:04 +0200, Philippe Guillebert a écrit :
> cdr wrote:
> > the atomic clock(s) arent orbiting the earth,
> 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 :)
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