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Precise Point Positioning Ambiguity Resolution with Multi-frequency Ionosphere-Reduced Combination

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China Satellite Navigation Conference (CSNC 2024) Proceedings (CSNC 2024)

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 1094))

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Abstract

Precise point positioning (PPP) with ambiguity resolution can improve positioning accuracy and reliability. In conventional dual-frequency ionosphere-free (IF) PPP (IFPPP), the IF ambiguity loses its integer property, so the fixing process needs to be decomposed into a two-step way of fixing wide-lane (WL) and narrow-lane (NL) ambiguity separately. Only when both are fixed at the same time, can a reliable positioning solution be obtained. In order to take full advantages of multi-frequency signals and simplify the ambiguity resolution process, by proper selecting the combination coefficients, a PPP ambiguity resolution method based on ionosphere-reduced (IR) combination is proposed in this paper. The proposed IRPPP model hardly needs to consider the effect of ionosphere, while has the equivalent wavelength and observation noise compared with conventional IFPPP. In addition, the combined IR ambiguity maintains its integer solvability, thus only one-step of directly fixing the IR ambiguity is need to achieve positioning performance comparable to conventional IFPPP. The model is further evaluated globally, and the results show that the IRPPP is superior to the conventional IFPPP in terms of the number of available NL ambiguity and the time to first fix (TTFF), and the average TTFF can be shortened by 22.6%. As for positioning accuracy, both models are basically the same with centimeter-level accuracy.

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Acknowledgments

This work is partially supported by the National Natural Science Foundation of China (Grant No. 42204027), and the Foundation of Laboratory of Science and Technology on Marine Navigation and Control, China State Shipbuilding Corporation (Grant No. 2021010104). The authors sincerely thank IGS and CODE for providing multi-GNSS data and products.

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Authors and Affiliations

  1. School of Instrument Science and Engineering, Southeast University, Nan**g, 210096, China

    Qing Zhao, Shuguo Pan & Wang Gao

  2. Laboratory of Science and Technology On Marine Navigation and Control, China State Shipbuilding Corporation, Tian**, 300131, China

    Qing Zhao, Shuguo Pan, Wang Gao, Ji Liu, Yin Lu & Peng Zhang

Authors
  1. Qing Zhao
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  2. Shuguo Pan
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  3. Wang Gao
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  4. Ji Liu
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  5. Yin Lu
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  6. Peng Zhang
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Corresponding author

Correspondence to Shuguo Pan .

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Editors and Affiliations

  1. China Satellite Navigation Engineering Centre, Bei**g, China

    Changfeng Yang

  2. China Academy of Space Technology, Bei**g, China

    Jun **e

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Zhao, Q., Pan, S., Gao, W., Liu, J., Lu, Y., Zhang, P. (2024). Precise Point Positioning Ambiguity Resolution with Multi-frequency Ionosphere-Reduced Combination. In: Yang, C., **e, J. (eds) China Satellite Navigation Conference (CSNC 2024) Proceedings. CSNC 2024. Lecture Notes in Electrical Engineering, vol 1094. Springer, Singapore. https://doi.org/10.1007/978-981-99-6944-9_20

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  • DOI: https://doi.org/10.1007/978-981-99-6944-9_20

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-99-6943-2

  • Online ISBN: 978-981-99-6944-9

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