估算路灯、车辆和住宅照明对城市夜空亮度的相对贡献
Estimating the relative contribution of streetlights, vehicles and residential lighting to the urban night sky brightness
摘要：
在稳定的大气条件下，城市天空的天顶亮度在整个夜晚随着人为排放的光的时间过程而变化。不同类型的人造光源（例如路灯，住宅和车辆灯）呈现特定的时间特征，并且该特征使得可以估计每个光源贡献的天空亮度量。我们的方法是基于转换的天顶天空亮度的时间表示成一个模态系数，在时间过程中的源签名。模式系数，因此每种类型的源的绝对和相对的贡献，可以估计从测量的亮度通过线性最小二乘拟合。本文介绍了一种基于城市夜景大视场缩时测光的时间特征测定方法。我们的初步结果表明，人造光泄漏出的住宅建筑物的窗户可能占显着份额的天顶天空亮度的时变部分，而车辆灯光的贡献似乎显着较小。
英文摘要：
Under stable atmospheric conditions, the zenithal brightness of the urban sky varies throughout the night following the time course of the anthropogenic emissions of light. Different types of artificial light sources (e.g. streetlights, residential, and vehicle lights) present specific time signatures, and this feature makes it possible to estimate the amount of sky brightness contributed by each one of them. Our approach is based on transforming the time representation of the zenithal sky brightness into a modal coefficients one, in terms of the time course signatures of the sources. The modal coefficients, and hence the absolute and relative contributions of each type of source, can be estimated from the measured brightness by means of linear least squares fits. A method for determining the time signatures is described, based on wide-field time-lapse photometry of the urban nightscape. Our preliminary results suggest that artificial light leaking out of the windows of residential buildings may account for a significant share of the time-varying part of the zenithal sky brightness, whilst the contribution of the vehicle lights seems to be significantly smaller.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
