FY-3B MWRI在轨辐射校准及其对旱涝灾害监测应用

陈昊; 金亚秋

doi:10.11834/jrs.20121299

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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
2012年16卷第5期页码：1024-1034
纸质出版：2012
DOI： 10.11834/jrs.20121299
稿件说明：

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[1]陈昊,金亚秋.FY-3B MWRI在轨辐射校准及其对旱涝灾害监测应用[J].遥感学报,2012,16(05):1024-1034. DOI： 10.11834/jrs.20121299.

In-orbit intercalibration of FY-3B/MWRI and applications for monitoring drought and flooding[J]. Journal of Remote Sensing, 2012, 16(5): 1024-1034. DOI： 10.11834/jrs.20121299.

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。

Abstract

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.