New GPS Measurement Modeling Techniques of Orbit Determination and Precise Kinematic Positioning
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Date
1995-08
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Ohio State University. Division of Geodetic Science
Abstract
It is the objective of this research to attack the two most important topics in today's GPS development, namely, high-precision orbit determination and precise kinematic positioning, with optimally developed measurement modeling techniques. This research therefore is divided into two major parts. The first part is devoted to efficient orbit estimation - using the measurement triple differencing technique to achieve high-precision GPS orbit determination without going through the time consuming data editing procedure, and in the meantime, automate the entire computation process to eliminate any need of human interaction. The second part concentrates on precise kinematic positioning - using the forward and smoother filters that operate on single-differenced measurements and incorporating a newly developed spatial stochastic model of differential ionospheric effects. Analyses of results are also presented.