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A Method for Calculating the Integrity Risk of RAIM under Multiple Fault Conditions
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Jun CAO1, Bing XUE2, 3, *, Yunbin YUAN4, Zelin DAI1, Yifan WANG1
Journal of Geodesy and Geodynamics | 2025, 45(4) : 351 - 355
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Journal of Geodesy and Geodynamics | 2025, 45(4): 351-355
A Method for Calculating the Integrity Risk of RAIM under Multiple Fault Conditions
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Jun CAO1, Bing XUE2, 3, *, Yunbin YUAN4, Zelin DAI1, Yifan WANG1
Affiliations
  • 1 Electric Power Science Research Institute of Yunnan Power Grid Co Ltd, 105 West-Yunda Road, Kunming 650217, China
  • 2 School of Civil Engineering and Architecture, Wuyi University, 99 Mid-Yingbin, Jiangmen 529020, China
  • 3 Jiangmen Land Surveying and Mapping Brigade, 83 First-Jianghai Road, Jiangmen 529000, China
  • 4 Innovation Academy for Precision Measurement Science and Technology, CAS, 340 Xudong Street, Wuhan 430077, China

    • CAO Jun, assistant engineer, majors in high-precision positioning and application of Beidou/GNSS, power grid disaster prevention and reduction, and lightning protection, E-mail:

About Author:

CAO Jun, assistant engineer, majors in high-precision positioning and application of Beidou/GNSS, power grid disaster prevention and reduction, and lightning protection, E-mail:

Published: 2025-04-15 doi: 10.14075/j.jgg.2024.05.207
Outline
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This paper proposes a method that can calculate the integrity risk of RAIM under multiple fault conditions. This method is based on constructing a chi-square test statistic using least squares residuals for fault detection, and further calculates the integrity risk by searching for the worst case fault vector under multiple fault modes based on the probability distribution of the test statistic and positioning error. The actual experimental results show that the proposed method can effectively monitor the integrity risk of multiple faults, achieve risk alarms during periods of poor observation geometry, and ensure reliable user positioning. Under the integrity requirements of the aviation LPV-200 phase, the availability of user positioning results reached 99.47%.

receiver autonomous integrity monitoring  /  fault mode  /  fault vector  /  worst case  /  integrity risk
曹俊, 薛兵, 袁运斌, 代泽林, 王一帆. 一种多故障条件下RAIM完好性风险计算方法. 大地测量与地球动力学, 2025 , 45 (4) : 351 -355 . DOI: 10.14075/j.jgg.2024.05.207
Jun CAO, Bing XUE, Yunbin YUAN, Zelin DAI, Yifan WANG. A Method for Calculating the Integrity Risk of RAIM under Multiple Fault Conditions[J]. Journal of Geodesy and Geodynamics, 2025 , 45 (4) : 351 -355 . DOI: 10.14075/j.jgg.2024.05.207
Funding
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  • Science and Technology Project of China Southern Power Grid Yunnan Power Grid Co Ltd(YNKJXM20220033)
  • Science and Technology Project in the Field of Social Development of Jiangmen(2024800200250007826)
Appendix
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Year 2025 volume 45 Issue 4
33
13
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Article Info
doi: 10.14075/j.jgg.2024.05.207
  • Receive Date：2024-05-05
  • Online Date：2026-10-30
  • Published：2025-04-15
Article Data
Affiliations
History
  • Received：2024-05-05
Funding
Science and Technology Project of China Southern Power Grid Yunnan Power Grid Co Ltd(YNKJXM20220033)
Science and Technology Project in the Field of Social Development of Jiangmen(2024800200250007826)
Affiliations
    1 Electric Power Science Research Institute of Yunnan Power Grid Co Ltd, 105 West-Yunda Road, Kunming 650217, China
    2 School of Civil Engineering and Architecture, Wuyi University, 99 Mid-Yingbin, Jiangmen 529020, China
    3 Jiangmen Land Surveying and Mapping Brigade, 83 First-Jianghai Road, Jiangmen 529000, China
    4 Innovation Academy for Precision Measurement Science and Technology, CAS, 340 Xudong Street, Wuhan 430077, China
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https://castjournals.cast.org.cn/joweb/ddcl/EN/10.14075/j.jgg.2024.05.207
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