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Precise point positioning with mixed use of time-differenced and undifferenced carrier phase from multiple GNSS

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Abstract

A multi-GNSS kinematic precise point positioning (PPP) approach that is based on the mixed use of time-differenced and undifferenced carrier phase observations is presented. The approach reduces the number of constant parameters, such as ambiguities and hardware biases, and mitigates quasi-constant systematic errors including residual atmospheric refractions and multipath effects. The effectiveness and efficiency of the proposed approach are validated in some PPP tests of running and vehicle driving. The proposed method requires an accurate initial position. When that is available, up to 71% improvement in positioning accuracy can be achieved compared with traditional PPP. The proposed approach is also computationally efficient, especially for high-rate positioning applications.

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Acknowledgements

The authors would like to thank the anonymous reviewers and the editors for their constructive comments. Discussions with Dr. Kejie Chen at the Jet Propulsion Laboratory (JPL) and Dr. Nan Zang at the Tongji University are very useful. The Multi-GNSS Experiment (MGEX) of the International GNSS Service (IGS) is acknowledged for the precise GNSS products. The research was partly supported by the Research Grants Council of the Hong Kong Special Administrative Region (Project No. PolyU 152043/14E), National Natural Science Foundation of China (Project No. 41374013), and the Research Institute for Sustainable Development of the Hong Kong Polytechnic University.

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Correspondence to Xiaoli Ding.

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Yu, W., Ding, X., Chen, W. et al. Precise point positioning with mixed use of time-differenced and undifferenced carrier phase from multiple GNSS. J Geod 93, 809–818 (2019). https://doi.org/10.1007/s00190-018-1201-8

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  • DOI: https://doi.org/10.1007/s00190-018-1201-8

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