Properties Analysis of Lunar Regolith at Chang’E-4 Landing Site Based on 3D Velocity Spectrum of Lunar Penetrating Radar
The Chinese Chang’E-4 mission for moon exploration has been successfully completed. The Chang’E-4 probe achieved the first-ever soft landing on the floor of Von Kármán crater (177.59°E, 45.46°S) of the South Pole-Aitken (SPA) basin on January 3...
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MDPI AG
2020-02-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/12/4/629 |
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| author | Zejun Dong Xuan Feng Haoqiu Zhou Cai Liu Zhaofa Zeng Jing Li Wenjing Liang |
| author_facet | Zejun Dong Xuan Feng Haoqiu Zhou Cai Liu Zhaofa Zeng Jing Li Wenjing Liang |
| author_sort | Zejun Dong |
| collection | DOAJ |
| description | The Chinese Chang’E-4 mission for moon exploration has been successfully completed. The Chang’E-4 probe achieved the first-ever soft landing on the floor of Von Kármán crater (177.59°E, 45.46°S) of the South Pole-Aitken (SPA) basin on January 3, 2019. Yutu-2 rover is mounted with several scientific instruments including a lunar penetrating radar (LPR), which is an effective instrument to detect the lunar subsurface structure. During the interpretation of LPR data, subsurface velocity of electromagnetic waves is a vital parameter necessary for stratigraphic division and computing other properties. However, the methods in previous research on Chang’E-3 cannot perform velocity analysis automatically and objectively. In this paper, the 3D velocity spectrum is applied to property analysis of LPR data from Chang’E-4. The result shows that 3D velocity spectrum can automatically search for hyperbolas; the maximum value at velocity axis with a soft threshold function can provide the horizontal position, two-way reflected time and velocity of each hyperbola; the average maximum relative error of velocity is estimated to be 7.99%. Based on the estimated velocities of 30 hyperbolas, the structures of subsurface properties are obtained, including velocity, relative permittivity, density, and content of FeO and TiO<sub>2</sub>. |
| first_indexed | 2024-12-19T21:53:23Z |
| format | Article |
| id | doaj.art-98c022a2255e4d7ab4bbf33df2e4bd78 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-12-19T21:53:23Z |
| publishDate | 2020-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-98c022a2255e4d7ab4bbf33df2e4bd782022-12-21T20:04:20ZengMDPI AGRemote Sensing2072-42922020-02-0112462910.3390/rs12040629rs12040629Properties Analysis of Lunar Regolith at Chang’E-4 Landing Site Based on 3D Velocity Spectrum of Lunar Penetrating RadarZejun Dong0Xuan Feng1Haoqiu Zhou2Cai Liu3Zhaofa Zeng4Jing Li5Wenjing Liang6College of Geo-Exploration Science and Technology, Jilin University, No.938 Xi MinZhu Street, Changchun 130026, ChinaCollege of Geo-Exploration Science and Technology, Jilin University, No.938 Xi MinZhu Street, Changchun 130026, ChinaCollege of Geo-Exploration Science and Technology, Jilin University, No.938 Xi MinZhu Street, Changchun 130026, ChinaCollege of Geo-Exploration Science and Technology, Jilin University, No.938 Xi MinZhu Street, Changchun 130026, ChinaCollege of Geo-Exploration Science and Technology, Jilin University, No.938 Xi MinZhu Street, Changchun 130026, ChinaCollege of Geo-Exploration Science and Technology, Jilin University, No.938 Xi MinZhu Street, Changchun 130026, ChinaCollege of Geo-Exploration Science and Technology, Jilin University, No.938 Xi MinZhu Street, Changchun 130026, ChinaThe Chinese Chang’E-4 mission for moon exploration has been successfully completed. The Chang’E-4 probe achieved the first-ever soft landing on the floor of Von Kármán crater (177.59°E, 45.46°S) of the South Pole-Aitken (SPA) basin on January 3, 2019. Yutu-2 rover is mounted with several scientific instruments including a lunar penetrating radar (LPR), which is an effective instrument to detect the lunar subsurface structure. During the interpretation of LPR data, subsurface velocity of electromagnetic waves is a vital parameter necessary for stratigraphic division and computing other properties. However, the methods in previous research on Chang’E-3 cannot perform velocity analysis automatically and objectively. In this paper, the 3D velocity spectrum is applied to property analysis of LPR data from Chang’E-4. The result shows that 3D velocity spectrum can automatically search for hyperbolas; the maximum value at velocity axis with a soft threshold function can provide the horizontal position, two-way reflected time and velocity of each hyperbola; the average maximum relative error of velocity is estimated to be 7.99%. Based on the estimated velocities of 30 hyperbolas, the structures of subsurface properties are obtained, including velocity, relative permittivity, density, and content of FeO and TiO<sub>2</sub>.https://www.mdpi.com/2072-4292/12/4/629chang’e-4lunar penetrating radar (lpr)3d velocity spectrumproperties analysis |
| spellingShingle | Zejun Dong Xuan Feng Haoqiu Zhou Cai Liu Zhaofa Zeng Jing Li Wenjing Liang Properties Analysis of Lunar Regolith at Chang’E-4 Landing Site Based on 3D Velocity Spectrum of Lunar Penetrating Radar Remote Sensing chang’e-4 lunar penetrating radar (lpr) 3d velocity spectrum properties analysis |
| title | Properties Analysis of Lunar Regolith at Chang’E-4 Landing Site Based on 3D Velocity Spectrum of Lunar Penetrating Radar |
| title_full | Properties Analysis of Lunar Regolith at Chang’E-4 Landing Site Based on 3D Velocity Spectrum of Lunar Penetrating Radar |
| title_fullStr | Properties Analysis of Lunar Regolith at Chang’E-4 Landing Site Based on 3D Velocity Spectrum of Lunar Penetrating Radar |
| title_full_unstemmed | Properties Analysis of Lunar Regolith at Chang’E-4 Landing Site Based on 3D Velocity Spectrum of Lunar Penetrating Radar |
| title_short | Properties Analysis of Lunar Regolith at Chang’E-4 Landing Site Based on 3D Velocity Spectrum of Lunar Penetrating Radar |
| title_sort | properties analysis of lunar regolith at chang e 4 landing site based on 3d velocity spectrum of lunar penetrating radar |
| topic | chang’e-4 lunar penetrating radar (lpr) 3d velocity spectrum properties analysis |
| url | https://www.mdpi.com/2072-4292/12/4/629 |
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