Fengyun-3D MERSI True Color Imagery Developed for Environmental Applications  

作　　者：Xiuzhen HAN Feng WANG Yang HAN 

机构地区：[1]National Satellite Meteorological Center,China Meteorological Administration,Beijing 100081 [2]Beijing Piesat Information Technology Co.Ltd.,Beijing 100195 [3]Nanjing University of Information Science&Technology,Nanjing 210044

出　　处：《Journal of Meteorological Research》2019年第5期914-924,共11页气象学报（英文版）

基　　金：Supported by the National Key Research and Development Program of China(2018YFC1506500)

摘　　要：Many techniques were developed for creating true color images from satellite solar reflective bands, and the so-derived images have been widely used for environmental monitoring. For the newly launched Fengyun-3 D(FY-3 D)satellite, the same capability is required for its Medium Resolution Spectrum Imager-II(MERSI-II). In processing the MERSI-II true color image, a more comprehensive processing technique is developed, including the atmospheric correction, nonlinear enhancement, and image splicing. The effect of atmospheric molecular scattering on the total reflectance is corrected by using a parameterized radiative transfer model. A nonlinear stretching of the solar band reflectance is applied for increasing the image contrast. The discontinuity in composing images from multiple orbits and different granules is eliminated through the distance weighted pixel blending(DWPB) method. Through these processing steps, the MERSI-II true color imagery can vividly detect many natural events such as sand and dust storms, snow, algal bloom, fire, and typhoon. Through a comprehensive analysis of the true color imagery, the specific natural disaster events and their magnitudes can be quantified much easily, compared to using the individual channel data.Many techniques were developed for creating true color images from satellite solar reflective bands, and the so-derived images have been widely used for environmental monitoring. For the newly launched Fengyun-3 D(FY-3 D)satellite, the same capability is required for its Medium Resolution Spectrum Imager-II(MERSI-II). In processing the MERSI-II true color image, a more comprehensive processing technique is developed, including the atmospheric correction, nonlinear enhancement, and image splicing. The effect of atmospheric molecular scattering on the total reflectance is corrected by using a parameterized radiative transfer model. A nonlinear stretching of the solar band reflectance is applied for increasing the image contrast. The discontinuity in composing images from multiple orbits and different granules is eliminated through the distance weighted pixel blending(DWPB) method. Through these processing steps, the MERSI-II true color imagery can vividly detect many natural events such as sand and dust storms, snow, algal bloom, fire, and typhoon. Through a comprehensive analysis of the true color imagery, the specific natural disaster events and their magnitudes can be quantified much easily, compared to using the individual channel data.

关 键 词：Medium RESOLUTION Spectrum Imager(MERSI) Fengyun satellite TRUE color IMAGERY 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]