High frequency thermal emission from the lunar surface and near surface   temperature of the Moon from Chang&apos;E-2 microwave radiometer

doi:10.1016/j.icarus.2013.12.024

CORC > 北京大学 > 地球与空间科学学院

	High frequency thermal emission from the lunar surface and near surface temperature of the Moon from Chang'E-2 microwave radiometer
	Fang, Tuo ; Fa, Wenzhe
刊名	icarus
	2014
关键词	Moon, surface Regoliths Radiative transfer RADAR REGOLITH SCATTERING THICKNESS MISSION LAYER
DOI	10.1016/j.icarus.2013.12.024
英文摘要	Near surface temperature of the Moon and thermal behaviors of the lunar regolith can provide important information for constraining thermal and magmatic evolution models of the Moon and engineering constrains for in situ lunar exploration system. In this study, China's Chang'E-2 (CE-2) microwave radiometer (MRM) data at high frequency channels are used to investigate near surface temperature of the Moon given the penetration ability of microwave into the desiccated and porous lunar regolith. Factors that affect high frequency brightness temperature (TB), such as surface slope, solar albedo and dielectric constant, are analyzed first using a revised Racca's temperature model. Radiative transfer theory is then used to model thermal emission from a semi-infinite regolith medium, with considering dielectric constant and temperature profiles within the regolith layer. To decouple the effect of diurnal temperature variation in the uppermost lunar surface, diurnal averaged brightness temperatures at high frequency channels are used to invert mean diurnal surface and subsurface temperatures based on their bilinear profiles within the regolith layer. Our results show that, at the scale of the spatial resolution of CE-2 MRM, surface slope of crater wall varies typically from about 20 degrees to 30 degrees, and this causes a variation in TB about 10-15 K. Solar albedo can give rise to a TB difference of about 5-10 K between maria and highlands, whereas a similar to 2-8 K difference can be compensated by the dielectric constant on the other hand. Inversion results indicate that latitude (phi) variations of the mean diurnal surface and subsurface temperatures follow simple rules as cos(030) phi and cos(0.36) phi, respectively. The inverted mean diurnal temperature profiles at the Apollo 15 and 17 landing sites are also compared with the Apollo heat flow experiment data, showing an inversion uncertainty <4 K for surface temperature and <1 K for subsurface temperature. (C) 2014 Elsevier Inc. All rights reserved.; Astronomy & Astrophysics; SCI(E); 1; ARTICLE; wzfa@pku.edu.cn; 34-53; 232
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/155532]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Fang, Tuo,Fa, Wenzhe. High frequency thermal emission from the lunar surface and near surface temperature of the Moon from Chang'E-2 microwave radiometer[J]. icarus,2014.
APA	Fang, Tuo,&Fa, Wenzhe.(2014).High frequency thermal emission from the lunar surface and near surface temperature of the Moon from Chang'E-2 microwave radiometer.icarus.
MLA	Fang, Tuo,et al."High frequency thermal emission from the lunar surface and near surface temperature of the Moon from Chang'E-2 microwave radiometer".icarus (2014).