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BDS multi-frequency PPP ambiguity resolution with new B2a/B2b/B2a + b signals and legacy B1I/B3I signals

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Abstract

As of December 2019, the core constellation of BeiDou Navigation Satellite System with global coverage (BDS-3) has been fully deployed with 24 MEO, 3 IGSO and 1 GEO satellites. In addition to the legacy B1I and B3I signals, BDS-3 satellites are capable of transmitting several new navigation signals, including B1C, B2a, B2b and B2a + b. The multi-frequency signals of BDS-3 bring new opportunities for fast ambiguity resolution (AR) of BDS precise point positioning (PPP). In this contribution, the BDS five-frequency PPP AR method was developed and the benefits of BDS-3 multi-frequency signals for precise positioning were investigated. The multi-frequency uncalibrated phase delay (UPD) products were estimated firstly using observations from 222 Multi-GNSS Experiment stations. The extra-wide-lane, wide-lane and narrow-lane UPDs of BDS-3 exhibit high stability with standard deviations less than 0.1 cycle. With the derived UPD products, five-frequency PPP AR was conducted at 12 static stations and a moving vehicle. The time to first fix of BDS PPP AR was shortened to 25.5 min with multi-frequency observations, showing improvement of 25.4% when compared to dual-frequency PPP AR. Moreover, instantaneous PPP wide-lane ambiguity resolution (WAR) can be achieved with success rate of over 90%. A fast decimeter-level accuracy can be achieved for BDS five-frequency PPP WAR with positioning accuracy improved by 68%-82% compared to PPP float solutions. The vehicle-borne experiment further demonstrates that BDS PPP WAR is potential to maintain decimeter-level positioning accuracy even in a complex environment.

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Data availability

The GNSS observations are available in the IGS repository, ftp://cddis.gsfc.nasa.gov/pub/gps/data.

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Acknowledgments

This work has been supported by National Science Fund for Distinguished Young Scholars (Grant No. 41825009), the National Natural Science Foundation of China (Grant 41774030, Grant 41974027, and Grant 41974029), Hubei Province Natural Science Foundation of China under Grant 2018CFA081, Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University:18-02-09.

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Authors and Affiliations

  1. School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, 430079, Wuhan, Hubei, China

    Xin Li, Xingxing Li, Gege Liu, Yongqiang Yuan & Keke Zhang

  2. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, 430079, China

    Mohamed Freeshah

  3. College of Geomatics, Shandong University of Science and Technology, 266590, Qingdao, China

    Feng Zhou

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  1. Xin Li
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  2. Xingxing Li
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  7. Feng Zhou
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Contributions

X.L. and XX.L. provided the initial idea and designed the experiments for this study; X.L., XX.L. and G.L. analyzed the data and wrote the manuscript; M.F., Y.Y., and K.Z. helped with the writing. All authors reviewed the manuscript.

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Correspondence to Xingxing Li.

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Li, X., Li, X., Liu, G. et al. BDS multi-frequency PPP ambiguity resolution with new B2a/B2b/B2a + b signals and legacy B1I/B3I signals. J Geod 94, 107 (2020). https://doi.org/10.1007/s00190-020-01439-8

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