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.
出处
《地理学与国土研究》
CSSCI
CSCD
北大核心
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)
