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《Acta Geodaetica Et Cartographic Sinica》 2003-03
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GPS Ambiguity Resolution Using Single-epoch Data

SUN Hongxing,LI Deren (School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079,China)  
For years, the fast ambiguity resolution method, especially that using a single epoch data, has been always a challenging issue in the precise GPS positioning. A new approach that is named as Dual Frequency Correlation Method (DUFCOM) is proposed for performing GPS carrierphase ambiguity resolution using singleepoch C/A code and dual frequency data. Based on the inner correlation of dual frequency carrier phase data and the statistic characteristic of carrier phase observation error, the concept of error strip of ambiguity in observation space is introduced firstly. Then the further search in the intersection of adjusted observation space and ambiguity space is carried out. At the same time, the sparse characteristic of the final space is discussed. The intersection search technique greatly enhances the efficiency by reducing the number of sets of ambiguities that needs to be searched. This reliable approach, which resolves the puzzle in dynamic GPS positioning, is proved to have high success rate though a great deal of experiments. It makes real possible for the efficient realtime positioning method, as well as the detection and reparation for cycle slips can be skipped.
【CateGory Index】: P228.4
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