High Accuracy GPS Semi-Kinematic Positioning: Modelling and Results

M. Elizabeth Cannon

Abstract:	The concept of GPS semi-kinematic positioning is reviewed with an emphasis on accuracies at the centimeter level. Details of the mathematical model used herein are given. A two step approach combines a Kalman filter to process kinematic carrier phase, phase rate and pseudorange data, while a batch least squares adjustment processes static carrier phase data. A semi-kinematic test performed over a well controlled traverse in a mountainous region near Calgary is used to assess the performance of the algorithm. Several runs of the traverse were made with the station occupation time at 2-3 minutes. The analysis shows that em-level accuracies can be achieved when five satellites are observed in good geometry, even when frequent cycle slips occur. An accuracy improvement technique of reverse processing is also investigated. Recommendations for improving semi-kinematic surveying are made.
Published in:	Proceedings of the 2nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1989) September 27 - 29, 1989 The Broadmoor Hotel Colorado Spring, CO
Pages:	405 - 418
Cite this article:	Cannon, M. Elizabeth, "High Accuracy GPS Semi-Kinematic Positioning: Modelling and Results," Proceedings of the 2nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1989), Colorado Spring, CO, September 1989, pp. 405-418.
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