Increased exposure to artificial light at night can affect human health including disruption of melatonin production and circadian rhythms which can extend to increased risks of hormonal cancers and other serious diseases. In addition, multiple negative impacts on fauna and flora are well documented, and it is a matter of fact that artificial light at night is a nuisance for ground-based astronomy. These impacts are frequently linked to the colour of the light or more specifically to its spectral content. Artificial light at night is often mapped by using spaceborne sensors, but most of them are panchromatic and thus insensitive to the colour. In this paper, we suggest a method that allows high-resolution mapping of the artificial light at night by using ground-based measurements with the LANcube system. The newly developed device separates the light detected in four bands (Red, Green, Blue and Clear) and provides this information for six faces of a cube. We found relationships between the LANcube’s colour ratios and (1) the Melatonin Suppression Index, (2) the StarLight Index and (3) the Induced Photosynthesis Index. We show how such relationships combined with data acquisition from a LANcube positioned on the top of a car can be used to produce spectral indices maps of a whole city in a few hours.

中文翻译：

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用LANcube绘制褪黑激素抑制，星光和诱导的光合作用指数

晚上增加暴露在人造光下会影响人体健康，包括破坏褪黑激素的产生和昼夜节律，这可能会增加激素癌症和其他严重疾病的风险。此外，对动植物的多重负面影响已得到充分证明，事实上，晚上的人造光对地面天文学是有害的。这些影响通常与光的颜色或更具体地与其光谱含量有关。夜间的人造光通常是使用星载传感器绘制的，但大多数都是全色的，因此对颜色不敏感。在本文中，我们提出了一种方法，该方法可以通过在LANcube系统中使用基于地面的测量来在夜间对人造光进行高分辨率映射。新开发的设备将检测到的光分成四个波段（红色，绿色，蓝色和透明），并为立方体的六个面提供此信息。我们发现LANcube的色彩比率与（1）褪黑激素抑制指数，（2）星光指数和（3）诱导的光合作用指数之间的关系。我们展示了如何将这种关系与从位于汽车顶部的LANcube的数据采集相结合，可以在几个小时内用于生成整个城市的光谱指数图。