ELIMINATING GPS BIASES THROUGH DATA DIFFERENCING |
As emphasised in the previous Table, the standard
approach to GPS phase data processing is to construct new observables by
differencing carrier beat phase observations in such a way that some or
all of the clock biases are eliminated, and the impact of several other
measurement biases is significantly reduced. The various differencing options
are illustrated in the Figure below.
Differencing options for GPS observations.
Each of these is dealt with in the following sections:
Between-Satellite Differencing.
Between-Receiver Differencing.
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© Chris Rizos, SNAP-UNSW, 1999