The algorithm of integer ambiguity resolution with BDS triple-frequency between reference stations at single epoch

doi:10.11947/j.AGCS.2020.20200110

Abstract

Abstract: The carrier phase integer ambiguity resolution between reference stations is very important in BDS network RTK. The algorithm of determining the BDS triple-frequency carrier phase ambiguity between reference stations at single-epoch is studied in this paper. Firstly, the linear relations of triple-frequency carrier phase ambiguity between the reference stations are deduced. Then the ambiguity candidates of B1 and B2 carrier phase are selected by ambiguity candidates of B1 carrier phase ambiguity and the linear relationship of dual-frequency carrier phase ambiguities, and the same as the ambiguity candidates of B1 and B3 carrier phase. The ambiguity candidates of triple-frequency carrier phase are controlled and fixed by the linear relationship between triple-frequency carrier phase ambiguities without errors. In order to reduce the influence of tropospheric delay on the constraint ability of linear relations between multi-frequency carrier phase ambiguities, the method of selecting a reference satellite with altitude and azimuth is used by the spatial correlation of atmospheric errors. The results of test indicate that the carrier phase integer ambiguities of triple-frequency between reference stations can be fixed at single-epoch, and the algorithm is simple and efficient.

Key words: BDS reference stations, triple-frequency observations, carrier phase integer ambiguity, integer linear relationship, single epoch

CLC Number:

P288

ZHU Huizhong, LEI Xiaoting, LI Jun, GAO Meng, XU Aigong. The algorithm of integer ambiguity resolution with BDS triple-frequency between reference stations at single epoch[J]. Acta Geodaetica et Cartographica Sinica, 2020, 49(11): 1388-1398.

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