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Quality Evaluation of CNES Real-Time Orbit and Clock Products from the Fault and User Range Accuracy
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Zhenyu WU1, Bao SHU1, 2, 3, *, Li WANG1, 2, 3, Lihong FAN4, Qin ZHANG1, 2, 3, Wei QU1, 2, 3
Journal of Geodesy and Geodynamics | 2025, 45(12) : 1226 - 1233
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Journal of Geodesy and Geodynamics | 2025, 45(12): 1226-1233
Quality Evaluation of CNES Real-Time Orbit and Clock Products from the Fault and User Range Accuracy
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Zhenyu WU1, Bao SHU1, 2, 3, *, Li WANG1, 2, 3, Lihong FAN4, Qin ZHANG1, 2, 3, Wei QU1, 2, 3
Affiliations
  • 1 School of Geological Engineering and Geomatics, Chang'an University, 126 Yanta Road, Xi'an 710054, China
  • 2 State Key Laboratory of Geo-Information Engineering, 1 Mid-Yanta Road, Xi'an 710054, China
  • 3 Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, 126 Yanta Road, Xi'an 710054, China
  • 4 National Time Service Center, CAS, 3 East-Shuyuan Road, Xi'an 710600, China

    • WU Zhenyu, postgraduate, majors in real-time precise point positioning, E-mail:

About Author:

WU Zhenyu, postgraduate, majors in real-time precise point positioning, E-mail:

Published: 2025-12-15 doi: 10.14075/j.jgg.2024.1.549
Outline
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Using the real-time orbit and clock products from CNES over a one-year period, with URE(user range error) as the evaluation metric, this study analyzes the fault rates, fault types, fault sources, as well as the post-fault accuracy and precise point positioning(PPP) performance of GPS, Galileo, BDS-2, and BDS-3 by comparing them with post-processed products. The results indicate that the fault rates of GPS and Galileo are lower than those of BDS, with significant differences observed between the fault rates of BDS-3 and BDS-2. Regarding fault types, abrupt faults are the least common, while clock offsets are the primary source of faults(accounting for over 65%). After fault elimination, the mean URA(user range accuracy) values for GPS, Galileo, and BDS-3 are 0.02 m, 0.03 m, and 0.05 m, respectively, whereas there is considerable variation in URA among different satellites in BDS-2. Global station simulated kinematic PPP tests demonstrate that excluding satellite fault periods can effectively ensure positioning accuracy.

precise point positioning  /  real-time orbit and clock products  /  user range error  /  integrity  /  CNES
吴震宇, 舒宝, 王利, 范丽红, 张勤, 瞿伟. CNES实时轨道钟差产品故障及用户测距精度评估. 大地测量与地球动力学, 2025 , 45 (12) : 1226 -1233 . DOI: 10.14075/j.jgg.2024.1.549
Zhenyu WU, Bao SHU, Li WANG, Lihong FAN, Qin ZHANG, Wei QU. Quality Evaluation of CNES Real-Time Orbit and Clock Products from the Fault and User Range Accuracy[J]. Journal of Geodesy and Geodynamics, 2025 , 45 (12) : 1226 -1233 . DOI: 10.14075/j.jgg.2024.1.549
Funding
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  • National Natural Science Foundation of China(12203060)
  • National Natural Science Foundation of China(42127802)
  • Shaanxi Outstanding Youth Science Foundation(2022JC-18)
  • Fundamental Research Funds for the Central Universities(30010226320)
  • Fundamental Research Funds for the Central Universities(300102263201)
  • Youth Innovation Promotion Association, CAS(2023426)
  • Shaanxi Provincial Science and Technology Innovation Team Project(2021TD-51)
  • Shaanxi Provincial Tri-Qin Scholars with Geoscience Big Data and Geohazard Prevention(2022)
Appendix
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Year 2025 volume 45 Issue 12
49
23
Cite this Article
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Article Info
doi: 10.14075/j.jgg.2024.1.549
  • Receive Date：2024-12-02
  • Online Date：2026-10-29
  • Published：2025-12-15
Article Data
Affiliations
History
  • Received：2024-12-02
Funding
National Natural Science Foundation of China(12203060)
National Natural Science Foundation of China(42127802)
Shaanxi Outstanding Youth Science Foundation(2022JC-18)
Fundamental Research Funds for the Central Universities(30010226320)
Fundamental Research Funds for the Central Universities(300102263201)
Youth Innovation Promotion Association, CAS(2023426)
Shaanxi Provincial Science and Technology Innovation Team Project(2021TD-51)
Shaanxi Provincial Tri-Qin Scholars with Geoscience Big Data and Geohazard Prevention(2022)
Affiliations
    1 School of Geological Engineering and Geomatics, Chang'an University, 126 Yanta Road, Xi'an 710054, China
    2 State Key Laboratory of Geo-Information Engineering, 1 Mid-Yanta Road, Xi'an 710054, China
    3 Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, 126 Yanta Road, Xi'an 710054, China
    4 National Time Service Center, CAS, 3 East-Shuyuan Road, Xi'an 710600, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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