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    Re: GPS as a time authority
    From: Antoine Cou�tte
    Date: 2009 Sep 15, 08:42 -0700

    I think that the reason brought up by "M. Lunav" is quite valid : processing 
    times may vary according to types of GPS receivers.
    There is also an ESSENTIAL REASON, which may have been skipped in this thread.
    GPS cannot accomodate any time discontinuities. Therefore, some 15 years ago, 
    GPS time - i.e. the one used by the GPS System - was the same as UT1.
    Now with the extra seconds added now and then to take in account the Earth 
    rotation changes, GPS time itself which is much more stable than UT1 has 
    become different from UT1 by a number of seconds amounting to 8 seconds (this 
    amount to be confirmed) to-day.
    Antoine M. Cou?tte
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