FY-3A/MERSI与Terra/MODIS地表反射率数据的初步比较  

Preliminary Comparison between FY-3A/MERSI and Terra/MODIS Surface Reflectance

作　　者：周芬 梁学伟 陈爱军[3,4] 张春艳 ZHOU Fen;LIANG Xuewei;CHEN Aijun;ZHANG Chunyan(Shengzhou Meteorological Administration, Shaoxing Zhejiang 312000, China;Shanghai Hongpu Information Technology Co. Ltd, Shanghai 201203, China;Climate and Weather Disasters Collaborative Innovation Center, Nanjing University of Information Science & Technology, Nanjing Jiangsu 210044, China;School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing Jiangsu 210044, China;Shaoxing Meteorological Administration, Shaoxing Zhejiang 312000, China)

机构地区：[1]嵊州市气象局,浙江绍兴312000 [2]上海洪朴信息科技有限公司,上海201203 [3]南京信息工程大学中国气象局气溶胶与云降水重点开放实验室,江苏南京210044 [4]南京信息工程大学大气物理学院,江苏南京210044 [5]绍兴市气象局,浙江绍兴312000

出　　处：《复旦学报（自然科学版）》2021年第4期551-562,共12页Journal of Fudan University：Natural Science

摘　　要：为探究联合MERSI和MODIS多角度观测数据遥感反演地表参数的可行性,本文首先利用MERSI观测几何角度信息(太阳天顶角、卫星天顶角、太阳卫星相对方位角)对MODIS地表反射率进行各向异性校正,之后选取2010年6—7月期间共24个晴空对比区域,对6组具有良好光谱对应关系的地表通道中的MERSI反射率,以及经过各向异性校正的MODIS反射率的相关性和偏差进行了统计分析.研究表明:(1)MERSI与MODIS地表反射率数据的相关系数一般在75%以上,相关性较好.其中红光通道反射率数据的相关性最高,相关系数达到95%.MERSI与MODIS反射率在3个可见光通道以及红外1通道中的偏差较小,均方根误差和平均偏差都在0.04以内.(2)红外2通道MERSI与MODIS反射率绝对偏差频率曲线呈现显著的“双峰”结构,因此该通道中MERSI与MODIS反射率的相关性较低(75%),均方根误差(0.087)和平均偏差(0.077)较大.(3)3种地表类型中,MERSI与MODIS反射率数据在庄稼地中的相关性最高、偏差也最小.This study aims to explore the feasibility of merging MERSI and MODIS multi-angle observations in remote sensing surface parameters.Firstly,the observation geometry information(including solar zenith angle,satellite zenith angle,and the sun-satellite relative azimuth)of MERSI is used for correcting MODIS surface reflectance anisotropy.Then,24 clear sky compared zones during JuneJuly,2010,were selected to analyze the correlation and deviation of MERSI and anisotropy corrected MODIS surface reflectance in 6 groups surface channels with a good correspondence relationship.The results are:(1)there is a good correlation between MERSI and MODIS surface reflectance,whose correlation coefficient is generally above 75%.The correlation coefficient between MERSI and MODIS in the red channel is 95%,which is the highest.The deviation between MERSI and MODIS reflectance is small in the three visible channel,and the IR-1 channel,in which the root mean square error and average deviation is within 0.04.(2)The frequency curve of the absolute difference between MODIS and MERSI in the IR-2 channel shows a significant“Twin Peaks”structure.Therefore,the correlation(75%)in this channel is low,and the root mean square error(0.087)and the mean deviation(0.077)are significant.The croplands show the most relevant,and also the minimum deviation between MERSI and MODIS reflectance among three land surface types.

关 键 词：中分辨率成像光谱仪 中分辨率成像光谱辐射计 地表反射率 相关性 偏差 

分 类 号：P4[天文地球—大气科学及气象学]