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    Re: Anyone know about this?
    From: Lu Abel
    Date: 2007 Nov 26, 19:40 -0800

    Lest there be any doubt, I did notice the smiley at the end of
    Alexandre's comment.
    At the same time, it wouldn't surprise me if various branches of the US
    military are trying to figure out what to do if GPS is jammed (and, yes,
    I know that at the military level it's pretty jam-proof) or becomes
    available in some circumstances ranging from solar storms to unexpected
    satellite outages.  Not too long ago, the US Coast Guard was prevented
    from switching off Loran C to keep it as a backup.
    Lu Abel
    Alexandre E Eremenko wrote:
    > Definitely they are preparing to switch off the GPS:-)
    >>On Nov 24, 2007, at 8:47 PM, Guy Schwartz wrote:
    >>>I was bopping around the USNO web site
    >>> A device that automatically observes stars, day or night, with
    >>>respect to the local gravity vector (i.e., the true "down"
    >>>direction), could provide a high-precision location
    > >
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