Abstract
MGEX (The Multi-GNSS Experiment) and iGMAS (international GNSS Monitoring & Assessment System) are two important global tracking networks of the BDS satellite navigation system. At present, all MGEX stations that can receive the BDS signal can track the BDS B1 and B2 signals. More than 20 stations can only track B1, B3 signals, and most iGMAS stations can only track B1, B3 signals. At the same time, BDS regional satellite navigation system broadcast B1, B2, B3 three frequency signal, and a new-generation BDS experimental satellite broadcast transitional signal of B1, B3. Based on this situation, a multi-frequency data fusion processing method is studied. The multi-frequency data fusion orbit determination and clock error estimation of BeiDou are realized by introducing the observation data of different frequency points from different observation networks. The proposed method has been applied and verified in the fusion of the BDS II and BDS experimental satellites. This method can introduce more MGEX stations and improve the BDS II MEO orbit accuracy by about 29%, 1DRMS to 5.5 cm; through the PPP verification of the BDS orbit and clock accuracy, PPP positioning accuracy increased by about 60%. The method can be applied to the BDS Global satellites construction for the early POD mission.
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The authors are grateful to the observation data provided by the International GNSS Monitoring and Evaluation System (www.igmas.org).
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Zeng, G., Fang, Y., Li, J., Zhu, J. (2018). Multi-frequency Combined POD and Clock Estimation for BDS. In: Sun, J., Yang, C., Guo, S. (eds) China Satellite Navigation Conference (CSNC) 2018 Proceedings. CSNC 2018. Lecture Notes in Electrical Engineering, vol 498. Springer, Singapore. https://doi.org/10.1007/978-981-13-0014-1_30
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DOI: https://doi.org/10.1007/978-981-13-0014-1_30
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