卫星图像中大气影响的消除模型

卫星图像中大气影响的消除模型

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Initial contribute: 2018-12-04

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Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
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Method-focused categoriesData-perspectiveRemote sensing analysis
Method-focused categoriesProcess-perspectivePhysical process calculation

Model Description

Chinese {{currentDetailLanguage}} Chinese

卫星图像中大气影响的消除模型

(1) 大气校正参数:

考虑一个平行于水平面的、光学厚度为b的均匀大气层,忽略极化。大气层被单色的、在垂直于传播方向的单位面积上的通量为的太阳光照射,方向指定为,其表面不是黑体,而是一个反射系数为A的均朗伯表面。表面辐射可写为:

式中,是大气对从下面入射的辐射的球面反射系数,这是大气平均反射特性的测度;是漫射透射率。

现考虑一个无穷小的目标,这是表面的一部分,也是朗伯的,但是其反射系数为r(称为目标反射系数),而不是背景反射系数A。一颗卫星透过大气观察目标,将会探测到一个表观目标辐射

式中,是所谓的大气路径福射;是到达卫星的辐射,表示反射光在穿过大气时的衰减;是所谓的背景路径辐射,通过漫射透射率对视角的依赖性而表示了随着角度的变化。

式中,是双向反射函数;是透射函数。

(2) 大气影响的消除:

目标的反射系数r给为:

式中,是表观目标反射系数;是已知表观背景反射系数;是总的透射率。

 

参考文献:

Haan J F, Hovenier J W,Kokke J M M et al:卫星图像中大气影响的消除――辐射传输方法。Remote Sensing ofEnvironment199137

How to Cite

《资源环境数学模型手册》 (2018). 卫星图像中大气影响的消除模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/e6e04113-073e-4360-b79f-e8db22acad21
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Last modifier : 
zhengzhong
Last modify time : 
2020-12-30
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Contributor

Initial contribute: 2018-12-04

Co-contributor(s)

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
Is authorship not correct? Feedback

History

Last modifier : 
zhengzhong
Last modify time : 
2020-12-30
Modify times : 
View History

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