Kocifaj Miroslav
ICA SAS, Slovak Academyof Sciences, Dúbravská cesta 9, 845 03 Bratislava, Slovak Republic.
Appl Opt. 2007 May 20;46(15):3013-22. doi: 10.1364/ao.46.003013.
The scalable theoretical model of light pollution for ground sources is presented. The model is successfully employed for simulation of angular behavior of the spectral and integral sky radiance and/or luminance during nighttime. There is no restriction on the number of ground-based light sources or on the spatial distribution of these sources in the vicinity of the measuring point (i.e., both distances and azimuth angles of the light sources are configurable). The model is applicable for real finite-dimensional surface sources with defined spectral and angular radiating properties contrary to frequently used point-source approximations. The influence of the atmosphere on the transmitted radiation is formulated in terms of aerosol and molecular optical properties. Altitude and spectral reflectance of a cloud layer are the main factors introduced for simulation of cloudy and/or overcast conditions. The derived equations are translated into numerically fast code, and it is possible to repeat the entire set of calculations in real time. The parametric character of the model enables its efficient usage by illuminating engineers and/or astronomers in the study of various light-pollution situations. Some examples of numerical runs in the form of graphical results are presented.
提出了一种适用于地面光源的可扩展光污染理论模型。该模型成功用于模拟夜间光谱和积分天空辐射率及/或亮度的角行为。对地面光源的数量或测量点附近这些光源的空间分布没有限制（即光源的距离和方位角均可配置）。与常用的点源近似不同，该模型适用于具有确定光谱和角辐射特性的实际有限维面光源。大气对传输辐射的影响根据气溶胶和分子光学特性来表述。云层的高度和光谱反射率是模拟多云和/或阴天条件时引入的主要因素。推导的方程被转化为数值计算速度快的代码，并且可以实时重复整套计算。该模型的参数特性使其在照明工程师和/或天文学家研究各种光污染情况时能有效使用。给出了一些以图形结果形式呈现的数值运行示例。
