大气交叉辐射影响是遥感数据中存在的大气影响的重要组成部分之一。多角度遥感是通过一定的观测角获取地面遥感数据,因而对斜视角度下大气交叉辐射影响的分析具有重要意义,这也是现有大气订正模型中较少涉及的部分。大气交叉辐射影响可以用点扩散函数表示,在频率域则可以用调制传递函数表示,因而通过对上述两个函数进行分析,可以掌握大气交叉辐射影响的特征,进而加以订正。

Cross radiation is an important part of atmospheric effect in remote sensing data The analysis of its effect in a slant viewing angle is significant,especially to the multi-angle remote sensing which obtain surface data through several scan angles This is also the domain rarely mentioned in the existing atmospheric correction models Atmospheric cross radiation effect can be described by the point spread function(PSF),whereas by the modulation transfer function(MTF)in the frequency domain We can specify and correct that effect by analysing those two functions In our research,we discover that the cross radiation is related not only to the atmospheric optical depth and image resolution,but also to the scan angle This paper provides its analytical expression and concludes some regularities.