物理“云”方程

物理“云”方程

  164

Contributor

contributed at 2018-12-04

Authorship

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

Classification(s)

Geography SubjectGIScience & Remote SensingOthers

Detailed Description

物理“云”方程

 

(1)    AttemaUlaby1978)将植被对雷达波的后向散射模拟为各向同性的小水滴组成的云,模型的驱动参数是植被层中的水分量及表层土中的体积水分含量:

 

 

式中,是雷达波截面积是单位土壤表面上的农作物水量是表层土中体积水分含量(%);是入射角;是单位农作物水分的衰减系数;是单位体积水分含量表层土的水分系数;是具有光学厚度的植被覆盖的后向散射系数是干燥土壤的后向散射

 

(2)    BoumanKasteren1989)对原始的“云”模型进行了修正,即把方程中的替换为农作物高度

 

 

这个模型对雷达后向散射的描述与两层“云”模型有相同的精度。

 

参考文献:

Bouman B A M:根据地基X-波段雷达后向散射数据估计农作物参数。Remote Sensing ofEnvironment1991,37

How to cite

《资源环境数学模型手册》 (2018). 物理“云”方程, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/096ea6df-0afe-4638-9287-32941ae60b5b
Copy

QR Code

Contributor

contributed at 2018-12-04

Authorship

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

QR Code

You can link related {{typeName}} from your personal space to this model item, or you can create a new {{typeName.toLowerCase()}}.

Model Content & Service

These authorship information will be submitted to the contributor to review.