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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  • 《资源环境数学模型手册》
    • Affiliation:  
    岳天祥编著
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    yue@lreis.ac.cn
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    冠层反射的简化模型

    (1)   Dymond和Qi (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;而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

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    《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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    {{lightenContributor.name}}
    Initial contribute: 2018-12-04

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    Authorship

  • 《资源环境数学模型手册》
    • 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 : 
    2 View History

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