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Article

Lunar Regolith Temperature Variation in the Rümker Region Based on the Real-Time Illumination

1
School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China
2
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China
3
School of Atmospheric Sciences, Sun Yatsen University, Zhuhai 519000, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(4), 731; https://doi.org/10.3390/rs12040731
Received: 21 January 2020 / Revised: 19 February 2020 / Accepted: 20 February 2020 / Published: 22 February 2020
(This article belongs to the Special Issue Lunar Remote Sensing and Applications)
Chang’E-5 will be China’s first sample−return mission. The proposed landing site is at the late-Eratosthenian-aged Rümker region of the lunar nearside. During this mission, a driller will be sunk into the lunar regolith to collect samples from depths up to two meters. This mission provides an ideal opportunity to investigate the lunar regolith temperature variation, which is important to the drilling program. This study focuses on the temperature variation of lunar regolith, especially the subsurface temperature. Such temperature information is crucial to both the engineering needs of the drilling program and interpretation of future heat-flow measurements at the lunar landing site. Based on the real-time illumination, and particularly the terrain obscuration, a one-dimensional heat equation was applied to estimate the temperature variation over the whole landing region. Our results confirm that while solar illumination strongly affects the surface temperature, such effect becomes weak at increasing depths. The skin depth of diurnal temperature variations is restricted to the uppermost ~5 cm, and the temperature of regolith deeper than ~0.6 m is controlled by the interior heat flow. At such a depth, China’s future lunar exploration is adequate to measure the inner heat flow, considering the drilling depth will be close to 2 m. View Full-Text
Keywords: moon; Chang’E-5; temperature; landing region; real-time illumination moon; Chang’E-5; temperature; landing region; real-time illumination
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MDPI and ACS Style

Zhong, Z.; Yan, J.; Xiao, Z. Lunar Regolith Temperature Variation in the Rümker Region Based on the Real-Time Illumination. Remote Sens. 2020, 12, 731. https://doi.org/10.3390/rs12040731

AMA Style

Zhong Z, Yan J, Xiao Z. Lunar Regolith Temperature Variation in the Rümker Region Based on the Real-Time Illumination. Remote Sensing. 2020; 12(4):731. https://doi.org/10.3390/rs12040731

Chicago/Turabian Style

Zhong, Zhen, Jianguo Yan, and Zhiyong Xiao. 2020. "Lunar Regolith Temperature Variation in the Rümker Region Based on the Real-Time Illumination" Remote Sensing 12, no. 4: 731. https://doi.org/10.3390/rs12040731

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