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Re: GPS suppression

-- [ From: Don DeJarnette - Simplecom * EMC.Ver #2.5.02 ] --

Selective Availability has been in effect for years but in our experience is
not implemented unless there is an on-going military conflict. President
Clinton made an announcement about a year ago that re-iterated this. We
operate handheld civilian units and DGPS at the Geological Survey.

73 de Don KC4YRT

> >This military official probably meant to say that the Air Force Space
> >Command would now begin to institute "Selective Availability" and "Anti-
> >Spoofing". What this means to the civilian GPS user is that the accuracy
> >your hanheld will be reduced from RMS accuracy (about 15 meters) to 100
> >meters. This is unless you use Differential GPS (DGPS). The signal is not
> >continuously degraded but "selectively" degraded.
> This has already been in effect for years. I think the article was an
> April Fools.
> If GPS is ever turned off entirely for civilians, a *lot* more stuff
> will break than just your handheld receivers.

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