THE EFFECT OF SUBPIXEL CLOUDS ON REMOTE-SENSING

被引:30
作者
KAUFMAN, YJ [1 ]
机构
[1] NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771
关键词
COMPUTER PROGRAMMING - Algorithms - REMOTE SENSING;
D O I
10.1080/01431168708948693
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
The effect of subpixel clouds on remote sensing of the surface reflectivity and of the vegetation index was numerically simulated for a thin layer of rectangular clouds. The simulation is for a 4 multiplied by 4 km**2 field of view (e. g. the low resolution NOAA-AVHRR images). A fixed cloud reflectivity was used as well as an empirical cloud model for eight cloud types. In the empirical models the cloud reflectivity varied with cloud fraction. A cloud fraction of 20 per cent, in a pixel with surface reflectance of 0. 05, can increase the apparent surface reflectance by 0. 02 for a model of strato-cumulus and by 0. 08 for a fixed cloud reflectance of R//c equals 0. 5.
引用
收藏
页码:839 / 857
页数:19
相关论文
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