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Mitigation of multipath effect in GNSS short baseline positioning by the multipath hemispherical map

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Abstract

Multipath is one major error source in high-accuracy GNSS positioning. Various hardware and software approaches are developed to mitigate the multipath effect. Among them the MHM (multipath hemispherical map) and sidereal filtering (SF)/advanced SF (ASF) approaches utilize the spatiotemporal repeatability of multipath effect under static environment, hence they can be implemented to generate multipath correction model for real-time GNSS data processing. We focus on the spatial–temporal repeatability-based MHM and SF/ASF approaches and compare their performances for multipath reduction. Comparisons indicate that both MHM and ASF approaches perform well with residual variance reduction (50 %) for short span (next 5 days) and maintains roughly 45 % reduction level for longer span (next 6–25 days). The ASF model is more suitable for high frequency multipath reduction, such as high-rate GNSS applications. The MHM model is easier to implement for real-time multipath mitigation when the overall multipath regime is medium to low frequency.

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Acknowledgments

This work is supported under the contracts of the National Natural Science Foundation of China (No. 61372086, No. 41201380) and Foundation of the Science and Technology Commission of Shanghai (No. 13511500300). We thank editor P. Wills and anonymous reviewers for constructive comments and suggestions.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, Shanghai, 200241, People’s Republic of China

    D. Dong, W. Chen, Z. Zeng, L. Song, Q. Zhang, M. Cai, Y. Cheng & J. Lv

  2. College of Surveying and Geo-Informatics, Tongji University, Shanghai, 200092, People’s Republic of China

    M. Wang

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  1. D. Dong
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  2. M. Wang
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  3. W. Chen
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  4. Z. Zeng
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  5. L. Song
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  6. Q. Zhang
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  7. M. Cai
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  8. Y. Cheng
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  9. J. Lv
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Correspondence to W. Chen.

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Dong, D., Wang, M., Chen, W. et al. Mitigation of multipath effect in GNSS short baseline positioning by the multipath hemispherical map. J Geod 90, 255–262 (2016). https://doi.org/10.1007/s00190-015-0870-9

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  • DOI: https://doi.org/10.1007/s00190-015-0870-9

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