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Re: Accuracy of GPS with respect to surveys

We have been doing GPS-based radiological surveys (with differential
correction) for about 4 years now.  The standard deviation of the position
coordinates is around 0.3 meter.  The accuracy is attained through
differential correction using a known base station location or through beaming
in the correction signal from a commercial or government base station for the
work area.

Ken Baker, ERGkbaker@aol.com