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arXiv 1909.10909astro-ph.IMphysics.ao-ph
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监测过渡:不同光度带的预期夜空亮度趋势

Monitoring transition: expected night sky brightness trends in different photometric bands

Salvador Bará, Iago Rigueiro, Raul C. Lima

摘要:

几种光污染指标通常用于监测从基于传统气体放电灯的户外照明系统向固态光源过渡的影响。在这项工作中,我们分析了这些指标的一个子集,包括人工天顶夜空亮度在视觉明视和暗视波段,亮度在特定的光度波段的广泛使用的天空质量计(SQM),和顶部的大气层辐射检测到的VIIRS-DNB辐射计板载卫星索米核电站。在分层大气中使用单散射近似,我们定量地表明,根据过渡的情况下,这些指标可能会显示不同的,甚至相反的行为。这主要是由于源的光谱和角辐射模式的变化,波长依赖的大气传播过程和探测器光谱灵敏度波段的差异的综合影响。建议在评估室外照明系统升级的公共政策决策结果时,应考虑到这种差异行为的可能存在。

英文摘要:

Several light pollution indicators are commonly used to monitor the effects of the transition from outdoor lighting systems based on traditional gas-discharge lamps to solid-state light sources. In this work we analyze a subset of these indicators, including the artificial zenithal night sky brightness in the visual photopic and scotopic bands, the brightness in the specific photometric band of the widely used Sky Quality Meter (SQM), and the top-of-atmosphere radiance detected by the VIIRS-DNB radiometer onboard the satellite Suomi-NPP. Using a single-scattering approximation in a layered atmosphere we quantitatively show that, depending on the transition scenarios, these indicators may show different, even opposite behaviors. This is mainly due to the combined effects of the changes in the sources' spectra and angular radiation patterns, the wavelength-dependent atmospheric propagation processes and the differences in the detector spectral sensitivity bands. It is suggested that the possible presence of this differential behavior should be taken into account when evaluating light pollution indicator datasets for assessing the outcomes of public policy decisions regarding the upgrading of outdoor lighting systems.

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