国土资源遥感Issue(4)：62-70,9.DOI:10.6046/gtzyyg.2012.04.11
利用MATLAB实现FY-3/MERSI地表温度反演及专题制图
Utilization of MATLAB to Realize LST Retrieval and Thematic Mapping from FY-3/MERSI Data
摘要
Abstract
Currently, application - oriented researches on the data of Medium Resolution Spectral Imager (MERSI) , which is on board China ' s new generation polar orbit meteorological satellite FY - 3 , are very insufficient, due to the reason that the data as a new source have been delivered only since 2008. With the normal operation of FY - 3 satellite system, it is necessary to develop an operational module for FY - 3/MERSI regional land surface temperature (LST) retrieval and its post - processing, since LST is required for a wide variety of scientific studies but FY - 3/MERSI' s operational LST products have not yet been provided by National Satellite Meteorological Center (NSMC ). Rased on an analysis of FY - 3/MERSI LI data' s HDF5 format and its channel characteristics, the authors selected the generalized single - channel algorithm developed by Jimenez - Munoz & Sobrino to directly realize the LST retrieval at 250 m spatial resolution with MATLAR programming and the thematic mapping of LST derivative products. This paper describes the parametric processes of LST retrieval algorithm in detail, which include radiometric calibration, cloud detection, estimation of two intermediate parameters - surface emissivity and atmospheric water vapor, and calculation of thermal indexes from LST. On these bases, an automatic flowchart for FY - 3/MERSI LST retrieval and thematic mapping was established. Experimental results of this flowchart applied in Shanghai thermal environmental monitoring show that it can process FY - 3/MERSI LI data in a fast, real - time and automatic way, thus suitable for operational products producing and sharing, with the saving of human resources. It is also proved that FY - 3/MERSI data and various forms of LST products can reveal the spatial pattern of Shanghai thermal field and the urban heat island effect more finely and intuitively.关键词
FY-3/MERSI/地表温度/反演/专题制图/MATLABKey words
FY - 3/MERSI/ land surface temperature (LST) / retrieval/ thematic mapping/ MATLAB分类
信息技术与安全科学引用本文复制引用
杨何群,尹球,周红妹,葛伟强..利用MATLAB实现FY-3/MERSI地表温度反演及专题制图[J].国土资源遥感,2012,(4):62-70,9.基金项目
上海市科委重点项目"上海城市热环境灾害遥感监测评估预警系统研究"(编号:10511501700)、上海市科委重点海洋科技(临港新城)专项"上海海洋区域海雾灾害预警预报系统研究"(编号:10DZ1210802)共同资助. （编号:10511501700）
