Courses - GPS 572
GPS 572 Precise Relative
Positioning (catalog description): Differencing observables
in space and time, common-mode error reduction, geometry-free
solutions, widelaning, closed-form solutions, cycle slips,
constraint solutions, integer ambiguity estimation, LAMBDA,
antenna calibration, multipath on pseudoranges and carrier phases,
spatial vector networks, differential corrections, global data
collection and maintenance, GPS services. Prerequisite: GPS 401
and 441, MAT 262 and 332, equivalent, or consent, Lec. 1, Cr.
1
In relative positioning, either
in the static or kinematic mode, we are using the popular single
-, double -, or triple difference functions to determine the
accurate relative location of two or more receivers and take
advantage of error cancellation/reduction when differencing the
observables.
The geometry-free solutions,
which do not parameterize the position of the receiver explicitly,
are suitable to discover and possibly remove cycle slips in
preprocessing.
A major part of this unit is
devoted to the powerful LAMBDA (least-squares ambiguity
decorrelation adjustment) technique to fix the estimated
ambiguities to integer. Whenever centimeter-accurate relative
positioning is needed, it is necessary to determine and fix the
integer values of the ambiguities.
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