Re: Accuracy of GPS with respect to surveys

["George Andrews" <mauser2@erols.com>]

Bruce,
    The actual number for position accuracy available to civilian population
is 15 meters. The 100 meter value is based on US DOD imposed Selective
Availability Program. Using an 8 channel serial receiver usually results in
a position error of 90 to 140 feet, (personal experience). This appears to
depend on the number of SATs locked onto. I suspect use of a 12 channel
parallel receiver would produce better accuracy. Use of the signal from a
digital GPS receiver and a GPS unit is said to be 5 to 10 meters.

George Andrews
mauser2@erols.com