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<p>Chang’e-7 (CE-7), which is an important project of the fourth phase of China’s lunar exploration program, is expected to be launched in 2026. The CE-7 mission consists of a mini-flying probe, an orbiter, a lander and a rover. The lunar penetrating radar (LPR), installed on the rover, is designed to probe the microwave characteristics of the shallow lunar surface and provide scientific data for the study of the Moon’s shallow structure. It offers both single-polarization and multi-polarization detection capabilities and is tasked with measuring the thickness and layered structure of the lunar regolith, as well as detecting subsurface stratification. It also has the ability to identify water ice. CE-7 LPR is a pseudo-random coding system radar which uses the Golay complementary code signal as the transmitted signal. To meet both depth and resolution requirements, it is equipped with both high-frequency and low-frequency channels. The low-frequency (LF) channel operates at the frequency range of 10 ∼ 110&#xa0;MHz, with the code length of 1024 bits, the detection depth of no less than 400&#xa0;m, and the layer thickness resolution of better than 2&#xa0;m. The high-frequency (HF) channel operates at frequency range of 100 ∼ 1500&#xa0;MHz, with the code length of 128 bits, the detection depth of no less than 40&#xa0;m, and the layer thickness resolution of better than 15&#xa0;cm. This paper provides a detailed description of the dual-channel design of the equipment and presents the results of some field tests.</p>

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The Lunar Penetrating Radar on the Chang’E-7 Rover

  • 期刊论文

  • 发表日期：

    2025年10月20日

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  • Shaoxiang Shen,
  • Chuanjun Tang,
  • Yuxi Li,
  • Wei Lu,
  • Shidong Li,
  • Zhongpeng Li,
  • Wangdong He,
  • Bo Zhao,
  • Guoliang Fan,
  • Xiaojun Liu,
  • Qunying Zhang,
  • Yicai Ji,
  • Bin Zhou,
  • Guangyou Fang,
  • Yan Su,
  • Shun Dai,
  • Tianling Tan,
  • Li Wang

摘要

Chang’e-7 (CE-7), which is an important project of the fourth phase of China’s lunar exploration program, is expected to be launched in 2026. The CE-7 mission consists of a mini-flying probe, an orbiter, a lander and a rover. The lunar penetrating radar (LPR), installed on the rover, is designed to probe the microwave characteristics of the shallow lunar surface and provide scientific data for the study of the Moon’s shallow structure. It offers both single-polarization and multi-polarization detection capabilities and is tasked with measuring the thickness and layered structure of the lunar regolith, as well as detecting subsurface stratification. It also has the ability to identify water ice. CE-7 LPR is a pseudo-random coding system radar which uses the Golay complementary code signal as the transmitted signal. To meet both depth and resolution requirements, it is equipped with both high-frequency and low-frequency channels. The low-frequency (LF) channel operates at the frequency range of 10 ∼ 110 MHz, with the code length of 1024 bits, the detection depth of no less than 400 m, and the layer thickness resolution of better than 2 m. The high-frequency (HF) channel operates at frequency range of 100 ∼ 1500 MHz, with the code length of 128 bits, the detection depth of no less than 40 m, and the layer thickness resolution of better than 15 cm. This paper provides a detailed description of the dual-channel design of the equipment and presents the results of some field tests.