FY-3B MWRI在轨辐射校准及其对旱涝灾害监测应用  

In-orbit intercalibration of FY-3B/MWRI and applications for monitoring drought and flooding

作　　者：陈昊[1] 金亚秋[1] 

机构地区：[1]复旦大学波散射与遥感信息重点实验室,上海200433

出　　处：《遥感学报》2012年第5期1024-1034,共11页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家自然科学基金项目(编号:60971091;40637033);教育部"博士研究生学术新人奖"基金

摘　　要：根据中国风云气象卫星FY-3B MWRI与近年在轨业务运行的Aqua卫星AMSR-E的技术参数,基于晴空大气辐射传输模型的模拟,分析了技术参数入射角等对辐射亮度温度Tb(Brightness temperature)的影响。以此依据,对AMSR-E原始多通道Tb数据进行入射角修正。采用二次多项式拟合方法,用入射角修正后的AMSR-ETb数据对FY-3B MWRITb数据进行各通道的辐射校准,并进行了数据对比。基于辐射校准后的FY-3BMWRI各通道Tb特征,用极化与散射特征指数,对2011年长江流域两湖地区的连续发生的干旱、降雨、水涝灾害等进行了评估与分析,并与AMSR-E的对应结果及地面观测站的记录结果进行了一致性的比较。研究表明,这些分析结果与地面观测记录比对的结果是一致的,FY-3B MWRI可以有效地监测旱涝灾害。As a second generation of China＇s polar meteorological satellite, FY-3A and FY-3B were launched in 2008 and 2010, respectively, in sun-synchronous orbits located at the altitude of 831 km. FY-3A and FY-3B load totally 11 sensors, including microwave sensors, including microwave temperature sounder （MWTS）, microwave humidity sounder （MWHS） and microwave radiometer imager （MWRI）. Analysis on technical features of FY-3 MWRI and AMSR-E and intercalibration can be of greatly help for future applications. In this paper, the FY-3 MWRI data over Yangtze River during spring and summer seasons of 2011 were collected because of serious drought, high temperature, precipitation and flooding. Based on radiative transfer and MWRI features, the polarization and scattering indexes for monitoring drought, precipitation and flooding happened are quantitatively analyzed. Results were also compared with both AMSR-E data and ground station records during the same periods.

关 键 词：MWRI AMSR—E 瞬时视场 辐射校准 极化指数 散射指数 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]