Re: GRACE-inspired question

From: Rainer.Kresken@esa.int
Date: Thu Jun 06 2002 - 04:29:48 EDT


> could the same data be acquired by very closely monitoring the
> orbit(s) of satellite(s) at many ground stations around the world
> (perhaps you could also measure the Doppler shifts of its radio signals)
> ?

Dear all!
In fact, this has been done already!
The Lageos disco ball satellites were launched for that purpose.
These sats are completely inert metall balls covered with
retroreflectors for high precision laser ranging.

Rainer


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