讲座题目：First Microwave Map of the Moon from Chang?ˉE-1 Data

主讲人: 曾镜涛教授, 联合国际学院

时间: 2012年3月28号（星期三）下午2点-3点

地点: E302

摘要:

Among recent lunar orbiters, only the Chinese Chang?ˉE-1 (CE-1) was equipped with passive microwave radiometer (MRM) to measure the natural microwave emission from the lunar surface. This microwave emission, characterized by brightness temperature (TB), is predominantly related to the physical temperature and dielectric properties of the lunar surface. Through the knowledge of brightness temperature, detail thermal behavior and properties of the lunar surface, important factors in the design of thermal shield for lunar module/rover, as well as site selection for manned landing and future lunar base, can be retrieved. Here we present the first microwave map of the Moon constructed from the CE-1?ˉs microwave brightness temperature data with special attention to the effect of lunar local time through the use of hour angle. With this processing technique to eliminate the distortion due to mixing spatial and temporal effects in the CE-1 data, we are able to reveal detailed regional fine structures unobserved previously at any lunar local time with unmatched sharpness. The microwave maps presented here will provide scientists with a new window to study the lunar surface independent of solar illumination, as well as a useful tool to probe the physical and geological properties of the sub-surface regolith layer.