GPS Selective availability turned off

[Bill Frantz]

At 7:42 AM -0700 5/2/00, Wookey wrote:
>This would have provided better GPS services for cavers anywhere in
>europe (so long as they could get access to the net), however this change
>may have made the idea largely redundant as non-SA GPS is probably good
>enough for most cave-location purposes. I'm waiting to find out what the
>expected differential numbers are under the non-SA regime, especailly
>under long-baseline condiditions. Anyone here know?

http://www.igeb.gov/ has a display of the error circle with both SA on and
SA off as determined when they turned it off to help search for a downed
airplane.  I don't think it is measuring differential error, just straight
GPS.  The bottom line is within 9 meters.  (Two frequency receiver)



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