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IFree Filter-Based User Positioning for Satellite-Based Augmentation System

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Abstract

Ionospheric storms and scintillation cause great impact on the service performance of single-frequency Satellite-Based Augmentation System (SBAS). On the one hand, conservative estimation method of the ionospheric integrity information can lead to the problem of over-wrapping in the pseudorange domain and cannot make it optimal to the service performance of SBAS. On the other hand, the performance of the ionospheric Kriging method is unstable in some regions with active ionospheric. Meanwhile, there will be a growing number of dual-frequency users with the development of GNSS. This paper proposes IFree Filter-based user positioning algorithm for SBAS and analyzes the positioning performance of 36 Monitor stations in North America. First, high-order differential method is used to detect cycle slip of dual-frequency carrier-phase observation, and chi-square test is used to detect and eliminate outliers. Then, the dual-frequency pseudorange is smoothed with the dual-frequency carrier phase after cycle slip repair, and the ionospheric delay is treated with IFree filter. Compared with the Wide Area Augmentation System (WAAS) algorithm, the signal-in-space correction accuracy by the proposed algorithm is significantly improved, which can provide LPV200 services for most regions in North America and even CAT-I services for some regions, and can be applied as key technologies to monitor stations and information processing center of the civil services platform for BeiDou Satellite-Based Augmentation System (BDSBAS).

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Funding

This work was funded by the Open Projects of State Key Laboratory of Satellite Navigation System and Equipment Technology (CEPNT2022B03), Open Fund Project of Science and Technology on Complex Electronic System Simulation Laboratory (614201004012103), Key Laboratory of Land Satellite Remote Sensing Application, Ministry of Natural Resources of the People’s Republic of China (KLSMNR-202310) and Tianjin University of Technology Research Innovation Project for Postgraduate Students (YJ2217).

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Authors and Affiliations

  1. Tianjin University of Technology, No. 391 Bin Shui Xi Dao Road, Xiqing District, Tianjin, 300384, China

    Kun Li (Associate professor), Xuanwen Wang (Master Student), Shuaiyong Zheng (Lecturer), Shuailong Chen (Master Student), Mengzhi Gao (Master Student) & Peng Yang (Associate professor)

  2. Nankai University, No. 94, Weijin Road, Nankai District, Tianjin, 300071, China

    Xiaoqin Jin (Ph. D Student)

  3. State Key Laboratory of Satellite Navigation System and Equipment Technology, The 54, Research Institute of China Electronics Technology Group Corporation, No. 589, Zhongshan West Road, Qiaoxi District, Shijiazhuang, 050081, China

    Jianlei Yang (Senior engineering)

Authors
  1. Kun Li
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  2. Xuanwen Wang
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  3. Shuaiyong Zheng
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  4. Shuailong Chen
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  5. Mengzhi Gao
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  6. Peng Yang
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  7. Xiaoqin Jin
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  8. Jianlei Yang
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Contributions

Conceptualization: SZ and XJ; Methodology: SZ; Writing original draft: SZ and XW; Editing: SZ and XW; Review: SC, MG, KL, JY, and PY. All authors read and approved the final manuscript.

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Correspondence to Shuaiyong Zheng.

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Li, K., Wang, X., Zheng, S. et al. IFree Filter-Based User Positioning for Satellite-Based Augmentation System. Int. J. Aeronaut. Space Sci. 25, 687–697 (2024). https://doi.org/10.1007/s42405-023-00693-2

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  • DOI: https://doi.org/10.1007/s42405-023-00693-2

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