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Calibration Method and Implementation for the Lunar Penetrating Radar on Chang’E-7 Mission
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Yuxi LI1, Shaoxiang SHEN1, 2, Wei LU1, 2, Chuanjun TANG1, 2, Shidong LI1, Zhongpeng LI1, Wangdong HE1, Guangyou FANG1
Chinese Journal of Space Science | 2026, 46(2) : 507 - 519
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Chinese Journal of Space Science | 2026, 46(2): 507-519
• Calibration for the Payload of Chang’E-7 Mission •
Calibration Method and Implementation for the Lunar Penetrating Radar on Chang’E-7 Mission
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Yuxi LI1, Shaoxiang SHEN1, 2, Wei LU1, 2, Chuanjun TANG1, 2, Shidong LI1, Zhongpeng LI1, Wangdong HE1, Guangyou FANG1
Affiliations
  • 1Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190
  • 2University of Chinese Academy of Sciences, Beijing 100190
Published: 2026-03-15 doi: 10.11728/cjss2026.02.2025-0102
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The Chang’E-7 mission carries a Lunar Penetrating Radar (LPR) for investigating lunar shallow subsurface structures. To ensure the validity of the acquired data and improve the accuracy and consistency of its interpretation, this study presents a comprehensive calibration framework suitable for space-grade penetrating radar systems, incorporating full-system gain calibration and system transfer function calibration, among others. Applying this methodology, the lunar radar system was rigorously calibrated, clarifying the optimal parameter configuration for its in-orbit operation. Under this parameter setting, all performance metrics of the radar system meet the design requirements: the system gains of the Low-Frequency (LF) and High-Frequency (HF) channels are 171.02 dB and 169.70 dB, respectively, fulfilling the detection depth requirements of 400 m and 40 m. The acquired Time-Varying Gain (TVG) curve and system transfer function, validated through simulated lunar regolith experiments, can provide effective calibration baselines for scientific data obtained during lunar surface exploration. This calibration scheme can serve as a technical reference for the calibration of radar systems in future deep-space exploration missions.

Chang’E-7  /  Lunar Penetrating Radar (LPR)  /  System calibration  /  System gain  /  Transfer function  /  Time-variant gain
Yuxi LI, Shaoxiang SHEN, Wei LU, Chuanjun TANG, Shidong LI, Zhongpeng LI, Wangdong HE, Guangyou FANG. Calibration Method and Implementation for the Lunar Penetrating Radar on Chang’E-7 Mission[J]. Chinese Journal of Space Science, 2026 , 46 (2) : 507 -519 . DOI: 10.11728/cjss2026.02.2025-0102
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Year 2026 volume 46 Issue 2
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Article Info
doi: 10.11728/cjss2026.02.2025-0102
  • Receive Date：2025-06-30
  • Online Date：2026-07-08
  • Published：2026-03-15
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  • Received：2025-06-30
  • Revised：2025-09-20
Affiliations
    1Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190
    2University of Chinese Academy of Sciences, Beijing 100190
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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
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
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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