Investigation of Instantaneous Ambiguity Resolution with the GPS/Galileo Combination for Precise Kinematic Positioning

D.B. Morujao and V.B. Mendes

Abstract:	The main concern in high precision relative kinematic GNSS positioning is to resolve double difference carrier phase ambiguities. In this paper, we propose a new algorithm to instantaneously resolve ambiguities, based on the General Criterion of Integer Ambiguity Search. This study examines the effectiveness of the proposed method for instantaneous ambiguity resolution, for present and modernized GPS and for Galileo, for short, medium and long baselines. The performance of the proposed algorithm is evaluated in terms of the percentage of correct instantaneous ambiguity resolution. Tests using simulated kinematic data were performed for distances between the rover and the reference stations of up to ~500 km. The results of these tests show that, under realistic conditions, the correct instantaneous ambiguity resolution was achieved more than 99% of the cases, when the GPS/Galileo combination with the three frequencies was used.
Published in:	Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007) September 25 - 28, 2007 Fort Worth Convention Center Fort Worth, TX
Pages:	808 - 817
Cite this article:	Morujao, D.B., Mendes, V.B., "Investigation of Instantaneous Ambiguity Resolution with the GPS/Galileo Combination for Precise Kinematic Positioning," Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007), Fort Worth, TX, September 2007, pp. 808-817.
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