The radiative transfer from a model of multi-layer random media embedded by multiple components, size-distributed, dense spherical scatterers is studied. The size distribution of spherical scatterers as ice grains and...The radiative transfer from a model of multi-layer random media embedded by multiple components, size-distributed, dense spherical scatterers is studied. The size distribution of spherical scatterers as ice grains and the effective radius are discussed by use of a snow sample. By using Gaussian quadrature, discrete ordinate and eigenanalysis methods, two vector radiative transfer equations of dense scatterers and four coupling boundary conditions are numerically solved. The polarized brightness temperature and the functional dependence on various parameters are obtained, which are well compared with experimental data from remote sensing of dry and wet snow.展开更多
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
基金Project Supported by the National Natural Science Foundation of China
文摘The radiative transfer from a model of multi-layer random media embedded by multiple components, size-distributed, dense spherical scatterers is studied. The size distribution of spherical scatterers as ice grains and the effective radius are discussed by use of a snow sample. By using Gaussian quadrature, discrete ordinate and eigenanalysis methods, two vector radiative transfer equations of dense scatterers and four coupling boundary conditions are numerically solved. The polarized brightness temperature and the functional dependence on various parameters are obtained, which are well compared with experimental data from remote sensing of dry and wet snow.
基金Project supported in part by the National Natural Science Foundation of China and NASA.
文摘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.
