Research on microwave radiation features and lunar regolith parameters inversion of the Rümker region

作     者：Xueying WANG Zhenzhan WANG Jingshan JIANG Dehai ZHANG Xueying WANG;Zhenzhan WANG;Jingshan JIANG;Dehai ZHANG

作者机构：Key Laboratory of Microwave Remote SensingNational Space Science CenterChinese Academy of SciencesBeijing100190China University of Chinese Academy of SciencesBeijing100049China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2021年第64卷第6期

页      面：1005-1014页

核心收录：

学科分类：08[工学] 0708[理学-地球物理学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.41771405)。 

主　　题：Rümker region Microwave sounder Brightness temperature Lunar regolith dielectric constant Lunar regolith thickness 

摘      要：Chang e-5(CE-5)mission is expected to land and sample in the Rümker region,north of the Oceanus Procellarum.To select optimal sampling points,the microwave radiation features in this mare unit are analyzed,and the dielectric constant and thickness of lunar regolith are retrieved based on Chang e lunar microwave sounder(CELMS)data.According to the microwave brightness temperature(TB)maps,TB varying with frequency at noon and midnight are different,in which noon TB increases with frequency,but midnight TB does not follow this rule.Moreover,there are differences among TB distributions at the three higher frequencies,especially in the southern part.In addition,a great TB difference between noon and midnight can be seen in Rümker E that shows higher daytime temperature but lower nighttime temperature.The inversion results reveal that the dielectric constant is lower in the west and north,higher in the middle and east,and the largest value occurs in Rümker E.As for the regolith thickness,most areas are uniform and no more than 4 m,with the thickest and thinnest regolith appearing in the northwest and Rümker E,no less than 6 m and about 2.5 m,respectively.Considering the safety and operability of landing and sampling,the northwest with thick regolith is recommended,while the Rümker E should be eluded.