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基于CELMS数据的月球东海微波辐射特性研究
孟治国1, 平劲松2, Alexander GUSEV3, 蔡占川4, 陈思1
1.吉林大学地球探测科学与技术学院;2.中国科学院国家天文台月球与深空探测重点实验室;3.俄罗斯喀山联邦大学,天文系;4.澳门科技大学太空研究所
摘要:
根据月壤(FeO+TiO2)含量数据和“嫦娥2号”卫星CELMS数据,对月球东海地区微波辐射特性进行了研究。结果表明,在东海内部(FeO+TiO2)含量较高的地区,其正午和午夜时刻的亮温值都比较高,亮温差值也比较大,但亮温及亮温差值的分布随频率变化呈现不均匀性;Maunder撞击坑的(FeO+TiO2)含量较低,但其低频 和高频亮温及亮温差值的表现正好相反;区域F(约10°S/106°W)、G(约5°S/104°W)和以(13°S/103°W)为中心的区域的微波辐射存在明显异常。这些区域的微波辐射特性对研究东海地区的形成演化过程具有重要意义。
关键词:  东海;微波辐射;CELMS数据
DOI:10.15982/j.issn.2095-7777.2014.03.009
分类号:P691
基金项目:国家自然科学基金(41371332、40901159);国家重点基础研究发展计划(973计划)项目(2015CB857101);澳门科技发展基金(084/2012/A3);浙江大学CAD&CG国家重点实验室开放课题(A1513)
Research on Microwave Emission Features of Mare Orientale Using CELMS Data
Meng Zhiguo1, Ping Jinsong2, Alexander Gusev3, CAI Zhanchuan4, Chen Si1
1.College of Geoexploration Science and Technology, Jilin University;2.Key Laboratory of Lunar and Planetary Exploration Research, National Astronomical Observatories, CAS;3.Geology institute, Kazan federal university;4.Institute of Space, Macau University of Science and Technology
Abstract:
As Mare Orientale is the youngest and best preserved multiring impact basin on the Moon, it is of essential importance to study its composition and structure for clues to the processes and histories of older, more degraded features. In this paper, the (FeO+TiO2) abundance derived from Clementine UV-VIS data and the CELMS data from Chang’e-2 satellite are employed to study the Microwave Emission features of the Mare Orientale. The results indicate that the regions with high CELMS data and high brightness temperature difference agree well with high (FeO+TiO2) abundance both on noon and on midnight. However, the change of the area with high CELMS data and high brightness temperature difference with the frequency indicates that the composition of the lunar regolith is varied with depth. The (FeO+TiO2) abundance in Maunder Crater is low, whereas the CELMS data and the brightness temperature differences in the low frequencies and the high frequencies show distinctly different features, which indicates that the composition of the lunar regolith here in the upper layer and the lower layer may be different. The abnormal microwave emission apparently exists in the regions (10°S /106°W), (5°S /104°W) and (13°S /103°W) in highland with low (FeO+TiO2) abundance, which is likely related to the temperature gradient of the deep regolith.. The microwave emission features in these areas are of special significance to study the evolution of the Mare Orientale.
Key words:  Mare Orientale;microwave emission;CELMS data