On Thu, 27 Mar 2008, Steve Allen wrote: > > Upon further consideration, I'm not sure I agree. For the purposes of > satellite navigation there is not need for the terrestrial reference > frame to be tightly tied to the celestial reference frame. Achieving > accuracy of 1 meter certainly doesn't care about rapid changes of > earth orientation parameters with respect to the quasars, only with > respect to the satellites. So it could be argued that the need for > VLBI campaigns would become a scientific extravagance no longer > relevant to civil life.
Is there enough coupling between Earth rotation and the orbiting satellites to make a difference between their reference frame and one derived from quasars? Tony. -- f.anthony.n.finch <[EMAIL PROTECTED]> http://dotat.at/ SHANNON: WESTERLY BACKING SOUTHERLY 6 TO GALE 8, PERHAPS SEVERE GALE 9 LATER. HIGH. SQUALLY SHOWERS. MODERATE OR POOR. _______________________________________________ LEAPSECS mailing list LEAPSECS@leapsecond.com http://six.pairlist.net/mailman/listinfo/leapsecs
