Measurement of
initial ambiguity is must for the carrier phase measurement
processing. The process of finding out the value
of ambiguity is called ambiguity resolution. Ambiguity remains
fixed after the initial lock. Its value may, however, change
if the receiver loses phase lock due to some disturbance. This
is called the cycle
slip and must be identified and repaired
before taking non-ambiguous observations. Figure 8.3 shows
the effect of resolving
the ambiguity is shown in two different methods of surveying
with GPS (Static and Rapid Static). Tese methods are explained
later. It may be scene
that once the ambiguity value is resolved, the accuracy of
measurement does not significantly improve with time.
Figure 8.3 Effects of ambiguity resolution on accuracy for
different surveying methods
