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Polarized surface scattering expressed in terms of a bidirectional reflectance distribution function matrix

机译：用双向反射率分布函数矩阵表示的偏振表面散射

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摘要

The fundamental quantity used to describe radiative transfer is the radiance or specific intensity. For unpolarized descriptions of surface scattering, the radiance is used in conjunction with the bidirectional reflectance distribution function (BRDF) defined by Nicodemus. Unfortunately, the BRDF does not describe polarization effects. In recent years, polarized descriptions of surface scattering have been developed, but the relationship between the BRDF and the polarized descriptions of surface scattering have not been published. The unpolarized description of surface scattering, which involves radiances and BRDFs, is extended to properly describe polarization effects. The concepts of radiance, ir-radiance, intensity, and radiant power are redefined as vector quantities. The intensity vectors are defined as conventional Stokes vectors and as the modified Stokes vectors adopted by Ishimaru, Ulaby, and others. The BRDF and directional reflectance matrices are defined and expressed in terms of the amplitude scattering matrix elements and in terms of the intensity scattering or phase matrix. The relationships between the unpolarized and polarized BRDFs and directional reflectances are discussed.
机译：用于描述辐射传递的基本量是辐射率或比强度。对于表面散射的非偏振描述，将辐射率与Nicodemus定义的双向反射率分布函数（BRDF）结合使用。不幸的是，BRDF没有描述极化效应。近年来，已经开发了对表面散射的极化描述，但是BRDF与表面散射的极化描述之间的关系尚未公开。涉及辐射和BRDF的表面散射的非偏振描述被扩展为正确描述偏振效应。辐射，辐照辐射，强度和辐射功率的概念被重新定义为矢量。强度矢量被定义为常规的斯托克斯矢量以及被Ishimaru，Ulaby等采用的改进的斯托克斯矢量。根据幅度散射矩阵元素以及强度散射或相位矩阵定义和表示BRDF和方向反射矩阵。讨论了非偏振和偏振BRDF与方向反射率之间的关系。

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