1. The Algorithm of Triple-frequency Ambiguity Resolution between BDS Network RTK Reference Stations
- Author
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GAO Meng, XU Aigong, ZHU Huizhong, GE Maorong, and YANG Qiushi
- Subjects
triple-frequency ,BeiDou navigation satellite system ,ionospheric delay error ,relative zenith tropospheric delay error ,Computer Science::Computation and Language (Computational Linguistics and Natural Language and Speech Processing) ,lcsh:Mathematical geography. Cartography ,integer ambiguity ,network RTK ,lcsh:GA1-1776 - Abstract
BeiDou navigation satellite system is currently the only system which the whole constellation offers triple-frequency observation data, triple-frequency observation is conducive to carrier phase ambiguity fixing quickly and accurately. The algorithm of triple-frequency integer ambiguity resolution between BDS network RTK reference stations is proposed. The observation of B2 frequency and B3 frequency and the strict criterion of ambiguity fixing are used to determine extra-wide-lane integer ambiguity. The linear relationship between fixed extra-wide-lane integer ambiguity and other wide-lane integer ambiguity is selected as constraint conditions, then the wide-lane integer ambiguity, relative zenith tropospheric delay error and ionospheric delay error are estimated and the wide-lane integer ambiguity can be fixed by search mode. There is a kind of integer linear relationship between fixed wide-lane integer ambiguity and triple-frequency carrier phase integer ambiguity, this linear relationship is added to the observation model of carrier phase ambiguity parameter estimation and the integer ambiguity can be fixed. This algorithm is tested by the measured triple-frequency data of BDS CORS network. The results indicate that triple-frequency carrier phase ambiguity can be fixed accurately and effectively with the method.
- Published
- 2017