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光在介质层中的路径散射及在下垫面的多次反弹 被引量:5
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作者 李小文 王锦地 +3 位作者 胡宝新 倪文革 A.Strahler c.woodcock 《中国科学(E辑)》 CSCD 1996年第5期457-466,共10页
辐射传输方程通常用于求解有限厚度水平均匀介质层中光的透射和反射。但当下垫面的边界条件不能简化时,光在介质层中的辐射传输与下垫面的反射的相互影响,使方程的求解极为复杂和困难,其解也难于理解与验证。将这一复杂耦合系统分解为... 辐射传输方程通常用于求解有限厚度水平均匀介质层中光的透射和反射。但当下垫面的边界条件不能简化时,光在介质层中的辐射传输与下垫面的反射的相互影响,使方程的求解极为复杂和困难,其解也难于理解与验证。将这一复杂耦合系统分解为假定下垫面无反射时光的路径散射和光在介质层与其下垫面之间的多次反弹,导出了下垫面非Lambert时多次反弹的四通量完整公式,并进而对路径散射建立了有明确物理意义的解析近似,为建立三维空间的几何光学-辐射传输混合模型的解析近似奠定了坚实基础。 展开更多
关键词 植被 遥感 辐射传输 多次散射 多次反弹
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Decoupling path-scattering of light in a homogeneous layer and multiple bouncing at its non-Lambertian bottom 被引量:1
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作者 李小文 倪文革 +2 位作者 胡宝新 c.woodcock A.Strahler 《Science China(Technological Sciences)》 SCIE EI CAS 1996年第6期656-669,共14页
Radiative transfer theories are usually used to calculate light transmitted and reflected on a layer of homogeneous medium.But if the layer has limited optical thickness and a non-Lamhertian lower bound,the multiple b... Radiative transfer theories are usually used to calculate light transmitted and reflected on a layer of homogeneous medium.But if the layer has limited optical thickness and a non-Lamhertian lower bound,the multiple bouncing between the layer and the lower bound will be coupled with the multiple scattering within the layer,thus making the solution very complicated.Through atmospheric correction for FOS MODIS MISR BRDF product and modeling shortwave absorption of snow under forest canopies,it is found that two complicated and apparently different cases can he handled similarly by decoupling the problem into two simpler and more basic formulations.i.e anahtical approximations ot path scattering i.e assuming a perfect absorbing lower bound: and the multiple bouncing between the layer and ils non-Lamhertian lower bound. 展开更多
关键词 remote sensing of VEGETATION RADIATIVE transfer MULTIPLE scattering. MULTIPLE
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