冠层反射的简化模型

冠层反射的简化模型

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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

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冠层反射的简化模型

(1)   DymondQi (1997)将厚植被冠层的辐射模拟为三个函数的乘积:

式中,S(i,e) 是冠层中阳光照射的比例,不包括互遮蔽部分;  是热点函数,针对冠层表面的互遮蔽性质对S(i,e)加以修正;是阳光照射的叶片的平均辐射。3个函数给为:

   

式中,i是入射角; e是出射角; 是相角(由太阳、目标、观察者构成); 分别是在入射方向和出射方向上的叶片投影面积; h是控制热点宽度的常数;w是二倍叶片反射率; E是太阳辐射通量密度。

(2)假设叶片的方位随机分布,对可见光,辐射可表示为: 

  

方程可推广到近红外光的多重散射情形:

  

式中,k是参数。

参考文献

Dymond J R, Shepherd J D,Qi J:标准化光学卫星图像的植被反射的简化物理模型。Remote Sensing of Environment 2001,75

How to Cite

《资源环境数学模型手册》 (2018). 冠层反射的简化模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/5fb93499-522f-4aed-9f90-b1a624d12e14
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Last modifier : 
haolingchen
Last modify time : 
2020-11-02
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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 : 
haolingchen
Last modify time : 
2020-11-02
Modify times : 
View History

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