大气散射方向指数函数研究

Atmospheric Scattering Directional Exponetional Function Study

在天空亮度分布中，大气散射方向指数占有非常重要的地位，以往的研究忽略了大气混浊度因子对散射方向指数的影响。本文在散射方向指数中考虑大气混浊度因子的影响，提出了新的大气散射方向指数函数，对不同混浊度因子，此函数与已知的晴天、部分云天和似阴天空有较好的近似，并更全面地考虑了分子散射，对进一步研究中间天空亮度分布具有理论意义。

Atmospheric scattering directional exponetional function is very important to study the distribution of skies luminance.The infulence of air turbidity factor to atmospheric scattering directional exponetional function was neglected in previous.In this paper,we considered the influence of air turbidity factor to atmospheric scattering and a scattering function,which proximates clear,cloudy and pesudovercast by varied turbidity factors,was presented.The atmospheric scattering for varied air condition was considered and molecular scattering was included in the function.Hence it provides a path for further theoretical studies on skies lumiance distribution.