论文标题
从天顶夜空亮度估算线性辐射指标：自然和光线污染的POSCH比率
Estimating linear radiance indicators from the zenith night sky brightness: on the Posch ratio for natural and light polluted skies
论文作者
论文摘要
从天顶夜空辐射测量的水平辐照度估算水平辐照度是对观测站现场评估，大气光学和环境科学的基础研究和应用研究的有用操作。这两个量之间的比率（也称为POSCH比率）先前已经在某些规范的情况下进行了研究，并报告了一些观察部位。在这项工作中，我们（a）将POSCH比率概念推广，将其扩展到任何一对与辐射相关的线性指标，（b）描述其主要代数属性，（c）为其三种基本的夜间组件（Moonlight，Starlight，Starlight，Starlight和其他天体光学的光源和艺术源）提供了分析表达式和数值评估。我们表明，水平辐照度（或任何其他线性辐射指标）通常与天顶辐射率相关，如果有一些关于大气状态的先验信息，则可以从天顶测量中进行估计。
Estimating the horizontal irradiance from measurements of the zenith night sky radiance is a useful operation for basic and applied studies in observatory site assessment, atmospheric optics and environmental sciences. The ratio between these two quantities, also known as Posch ratio, has been previously studied for some canonical cases and reported for a few observational sites. In this work we (a) generalize the Posch ratio concept, extending it to any pair of radiance-related linear indicators, (b) describe its main algebraic properties, and (c) provide analytical expressions and numerical evaluations for its three basic nighttime components (moonlight, starlight and other astrophysical light sources, and artificial light). We show that the horizontal irradiance (or any other linear radiance indicator) is generally correlated with the zenith radiance, enabling its estimation from zenith measurements if some a priori information on the atmospheric state is available.
