摘要
通过MODTRAN4建立地表反射率-入瞳处辐射亮度在可见光至近红外波段的大气查找表,研究时间因子对入瞳处辐射亮度值的影响,发现入瞳处辐射亮度值与日地距离订正系数随时间成反比,得到用任意一积日的入瞳处辐射亮度数据即可求得其他积日数据的方法.对其进行均方根误差分析的结果表明该方法可行,利用该方法将大大减少查找表的数据量,实现结构的优化.
Through the establishment of look-up table for surface albedo-TOA radiance in visible up to near-infrared band,it was found that the radiance values changed with time and was inversely proportional to the correction coefficient of sun-earth distance by studying the relationship between TOA radiance and time.A method was gained to get the whole yearly TOA radiance by using any daily data.The result of RMSE analysis showed that the method was reasonable.Using this method would greatly reduce the amount of data in look-up table to achieve structural optimization.
出处
《兰州理工大学学报》
CAS
北大核心
2010年第3期102-105,共4页
Journal of Lanzhou University of Technology
基金
中国科学院知识创新工程重要方向项目(kzcx2-yw-303)
关键词
大气查找表
日地距离订正系数
均方根误差
入瞳处辐射亮度
atmospheric look-up table
correction coefficient of sun-earth distance
root mean square error
TOA radiance
