基于地面耦合的TM影像的大气校正——以珠江口为例  

The Atmospheric Correction of TM Imagery Based on Ground Coupling——Taking the Pearl River Estuary as an Example

作　　者：陈蕾[1] 邓孺孺[1] 柯锐鹏[1] 刘小平[1] 

机构地区：[1]中山大学遥感与地理信息工程系,广东广州510275

出　　处：《地理学与国土研究》2004年第2期34-37,共4页Geography and Territorial Research

基　　金：国家973项目子课题"山地辐射传输模型及太湖水环境定量遥感模型"(G2000077903-8)

摘　　要：该文应用1998年的LANDSAT5TM影像,对原始数据进行定标、辐射校正,求得地物的行星反射率,在简单的大气校正理论模型的基础上,根据山区阴影处植被的反射率求取大气向上垂直的透过率,反求大气光学厚度和太阳入射方向上的大气向下的透过率,从而确定大气校正的各项参数。并对大气校正前后的图像进行比较,发现校正过的影像中的典型地物的反射率和其标准的反射率值较为吻合。The Landsat5 TM imagery in 1998 is used as the original data to calculate the planet albedo after calibration correction and radiation correction.Based on the simple theoretical model of atmospheric correction,according to the reflectivity of vegetation in the shadow in a mountainous area,the transmittance in up direction is calculated.In reverse,the atmospheric optical thickness and the transmittance in down direction along the incidence direction are reached and the parameters of atmospheric correction are identified.Comparing the result imagery with the original one,the reflectivity of typical objects tallied with the standard reflectivity.

关 键 词：卫星遥感 地面耦合 TM影像 大气校正 反射率 

分 类 号：P407.8[天文地球—大气科学及气象学]