Plass G N, Kattawar G W
Appl Opt. 1972 Dec 1;11(12):2866-79. doi: 10.1364/AO.11.002866.
The degree of polarization as well as the direction of the polarization are calculated by a Monte Carlo method for the reflected and transmitted photons from the earth's atmosphere. The solar photons are followed through multiple collisions with the aerosols and the Rayleigh scattering centers in the atmosphere. The aerosol number density as well as the ratio of aerosol to Rayleigh scattering vary with height. The aerosol index of refraction is assumed to be 1.55. The proportion of aerosol to Rayleigh scattering is appropriately chosen at each wavelength (lambda = 0.4 micro and 0.7 micro); ozone absorption is included where appropriate. Three different aerosol number densities are used to study the effects of aerosol variations. Results are given for a solar zenith angle of 81.37 degrees and various surface albedos. The radiance and polarization of the reflected and transmitted photons is particularly sensitive to the amount of aerosols in the atmosphere at certain angles of observation. The direction of pola ization shows little dependence on the surface albedo.
通过蒙特卡罗方法计算从地球大气反射和透射的光子的偏振度以及偏振方向。跟踪太阳光子在大气中与气溶胶和瑞利散射中心的多次碰撞。气溶胶数密度以及气溶胶与瑞利散射的比率随高度变化。假设气溶胶折射率为1.55。在每个波长（λ = 0.4微米和0.7微米）适当选择气溶胶与瑞利散射的比例；在适当的地方考虑臭氧吸收。使用三种不同的气溶胶数密度来研究气溶胶变化的影响。给出了太阳天顶角为81.37度和各种地表反照率的结果。在某些观测角度下，反射和透射光子的辐射率和偏振对大气中气溶胶的数量特别敏感。偏振方向对地表反照率的依赖性很小。
