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LI Yi, WANG Li, SHU Bao, TIAN Yunqing, WANG Bingjie. An Optimal Allocation Method for ARAIM Risk Considering DOP[J]. Geomatics and Information Science of Wuhan University. DOI: 10.13203/j.whugis20230482
Citation: LI Yi, WANG Li, SHU Bao, TIAN Yunqing, WANG Bingjie. An Optimal Allocation Method for ARAIM Risk Considering DOP[J]. Geomatics and Information Science of Wuhan University. DOI: 10.13203/j.whugis20230482
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An Optimal Allocation Method for ARAIM Risk Considering DOP

  • 1 College of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China;

  • 2 State Key Laboratory of Geographic Information Engineering, Xi'an 710054, China;

  • 3 Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054, China;

  • 4 CETC Galaxy BeiDou Technology (Xi'an) Co., Ltd., Xi'an 710068, China

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  • Received Date: May 18, 2024
  • Available Online: June 26, 2024
    Graphical Abstract
    • Abstract
  • Objectives: The advanced receiver autonomous integrity monitoring (ARAIM) algorithm equally allocates the integrity and continuity risk, which leads to a conservative protection level (PL) calculation. Methods: This paper systematically analyses the factors affecting the protection level calculation, proposes an optimal risk allocation method for ARAIM considering the dilution of precision (DOP), and verifies the effectiveness of the method by using three kinds of data from the MGEX (multi-GNSS experiment) station, vehicle and airborne experiments. Results: The results show that the proposed method can realize a tighter envelope of the protection level to the position error, and its performance is better than that of the half-interval search method. Compared to the riskaveraged method, the PL improvement rates of BDS in the three types of experiments are 7.5%, 11.6% and 8.8%, respectively. In addition, the PL optimization effect is closely related to the satellite observation geometry, and the improvement effect varies within different systems and regions. Conclusions: For BDS, the improvement in the non-Asia-Pacific region is better than that in the AsiaPacific region, with 3.6 m and 1.0 m respectively in the two regions. In the Asia-Pacific region, the optimization effect in BDS and BDS/GPS is 1.0 m and 0.6 m, respectively, with the single BDS enhancement being more significant.
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    • References (24)
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