Array-Aided CORS Network Ambiguity Resolution
Array-aided precise point positioning (A-PPP) is a measurement concept that uses Global Navigation Satellite System (GNSS) data, from multiple antennas in an array of known geometry, to realize the improved GNSS parameter estimation. In this contribution the ambiguity resolution benefits of A-PPP for antenna-array equipped CORS stations is explored. To demonstrate the performance of array-aided ambiguity resolution between-station, an 80 km baseline experiment, equipped with a 6-antenna array at each CORS station, was conducted. We formulate the underlying model, show how the array-data to be reduced and present numerical results on the ambiguity resolution performance. The results show that the use of antenna-arrays can significantly improve the CORS network ambiguity resolution.
KeywordsA-PPP Antenna-array Ambiguity resolution Success-rate Bootstrapping
The second author is the recipient of an Australian Research Council (ARC) Federation Fellowship (project number FF0883188). Part of this work was done in the framework of the project “New Carrier-Phase Processing Strategies for Next Generation GNSS Positioning” of the Cooperative Research Centre for Spatial Information (CRC-SI2). All these supports are gratefully acknowledged. The members in GNSS Research Center are appreciated for their help to set up the GPS field experiment.
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