嫦娥二号卫星微波探测仪数据定标和处理结果  

Data Processing and Result Analysis of CE-2 MRM

作　　者：封剑青[1] 苏彦[1] 刘建军[1] 郑磊[1] 谭旭[1] 戴舜[1] 李俊铎[1] 邢树果[1] 

机构地区：[1]中国科学院国家天文台月球与深空探测科学应用中心,北京100012

出　　处：《地球科学（中国地质大学学报）》2013年第4期898-906,共9页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金(No.11173038)

摘　　要：介绍了嫦娥二号(CE-2)与嫦娥一号(CE-1)搭载的微波探测仪(microwave radiometer,MRM)的不同之处,给出其亮度温度的算法和地面定标系数,并得到CE-2MRM获得的全月亮度温度分布图.分析了亮温的数据规律,并以此为基础归一化后比较了二者之间的数据差异.最后比较了不同取值的非线性系数对CE-2MRM亮温定标结果产生的影响.结果表明:目前CE-2MRM数据在3GHz、19.35GHz和37GHz频率符合地基观测结果的范围,同CE-1MRM结果相比在月球低纬度地区(≤50°)差异在11K以内,差异的主要原因是CE-2定标方法的改进以及定标方程中非线性项的引入,而7.8GHz通道的数据异常表明该通道存在系统误差.The design difference between Chang＇ E -1 microwave radiometer （CE-1 MRM） and Chang＇ E-2 microwave radiome ter （CE-2 MRM） is presented in this paper, as well as the data processing algorithm and ground calibration coefficients of CE- 2 MRM. Based on the data processing results, the distribution of brightness temperature （T~） of lunar surface is mapped. We propose a normalization model of TB by analyzing the regularity of the Tu distribution and compare the result Tf3 obtained by CE-2 MRM with CE-1 MRM. The discrepancy of Tu for CE-2 MRM results from different nonlinear coefficients is presented at last. It is concluded that the CE-2 3 GHz, 19. 35 GHz and 37 GHz data coincide with earth-based observation, and the discrep ancy between CE-I and CE-2 MRM is smaller than 11 K. There may be a systematic error on 7.8 GHz channel.

关 键 词：嫦娥二号 微波探测仪 亮温规律 数据比较 非线性系数 遥感 

分 类 号：P691[天文地球—地质学]