Leica Geosystems GPS Basics - Manual (Page 41)

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GPS Basics -1.0.0en Surveying with GPS
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The network ABCDE has to be
measured with three receivers. The
coordinates of A are known in
WGS84. The receivers are placed on
A, B and C. GPS data is recorded for
the required length of time.
After the required length of time, the
receiver that was at E moves to D
and B moves to C. The triangle ACD
is measured.
Then A moves to E and C moves to
B. The triangle BDE is measured.
Finally, B moves back to C and the
line EC is measured.
The end result is the measured
network ABCDE. One point is mea-
sured three times and every point has
been measured at least twice. This
provides redundancy. Any gross errors
will be highlighted and the offending
measurement can be removed.