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Research on Baseline Estimation Method Based on Attitude Analysis of Spaceborne Distributed InSAR System
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Jiaqi TIAN1, 2, 3, Weibin LIANG1, 2, Yafen WANG1, 2, 3, Huiming CHAI1, 2, Zi LIN1, 2
Radar Science and Technology | 2025, 23(5) : 503 - 512
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Radar Science and Technology | 2025, 23(5): 503-512
Research on Baseline Estimation Method Based on Attitude Analysis of Spaceborne Distributed InSAR System
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Jiaqi TIAN1, 2, 3, Weibin LIANG1, 2, Yafen WANG1, 2, 3, Huiming CHAI1, 2, Zi LIN1, 2
Affiliations
  • 1.Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
  • 2.Key Laboratory of Technology in Geo-spatial Information Processing and Application System, Chinese Academy of Sciences, Beijing 100190, China
  • 3.School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
doi: 10.3969/j.issn.1672-2337.2025.05.004
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Spaceborne distributed interferometic synthetic aperture radar (InSAR) system flying in formation winding, the relative attitude change of the two satellites leads to the dynamic change of baseline system error. The traditional baseline estimation method of calculating the mean value of baseline calibration results for a single calibration site cannot be effectively applied to uncalibrated arcs. A baseline estimation method is proposed in this paper to solve this problem. The baseline system error and the system error of the two satellites are analyzed, and the baseline calibration result is converted to the satellite system error. Then the baseline error of the uncalibrated arc is calculated by combining the orbit parameters and motion attitude of the satellite. The variations of the elevation difference, the relative attitude and the system error of the traditional baseline estimation method and the proposed baseline estimation method during the flight of the satellite are simulated, and the experimental results are verified by the measured data of the Chinese spaceborne distributed InSAR system. The experimental results show that the proposed baseline estimation method can improve the ground elevation measurement accuracy of the uncalibrated arc compared with the traditional baseline estimation method, and provide a new method for the application of baseline calibration results of spaceborne distributed InSAR system.

spaceborne distributed InSAR  /  baseline estimation method  /  systematic error  /  baseline calibration
Jiaqi TIAN, Weibin LIANG, Yafen WANG, Huiming CHAI, Zi LIN. Research on Baseline Estimation Method Based on Attitude Analysis of Spaceborne Distributed InSAR System[J]. Radar Science and Technology, 2025 , 23 (5) : 503 -512 . DOI: 10.3969/j.issn.1672-2337.2025.05.004
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Article Info
doi: 10.3969/j.issn.1672-2337.2025.05.004
  • Receive Date：2024-12-16
  • Online Date：2026-04-23
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  • Received：2024-12-16
  • Revised：2025-03-05
Affiliations
    1.Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
    2.Key Laboratory of Technology in Geo-spatial Information Processing and Application System, Chinese Academy of Sciences, Beijing 100190, China
    3.School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, 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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