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arXiv 1709.09558astro-ph.IM
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测量夜空亮度:方法和挑战

Measuring night sky brightness: methods and challenges

Andreas Hänel, Thomas Posch, Salvador J. Ribas, Martin Aubé, Dan Duriscoe, Andreas Jechow, Zoltán Kollath, Dorien E. Lolkema, Chadwick Moore, Norbert Schmidt, H… 展开作者

Andreas Hänel, Thomas Posch, Salvador J. Ribas, Martin Aubé, Dan Duriscoe, Andreas Jechow, Zoltán Kollath, Dorien E. Lolkema, Chadwick Moore, Norbert Schmidt, Henk Spoelstra, Günther Wuchterl, Christopher C. M. Kyba

摘要:

近年来,测量夜空亮度已成为一个越来越重要的话题,因为人造光及其被地球大气层散射的现象继续在全球蔓延。为完成这项任务,已经开发了几种工具和技术。我们给出了这些概述,并讨论其优势和局限性。不同的数量,可以和应该得到测量夜空亮度时进行了讨论,以及在这种情况下,已经和仍然需要定义的程序。我们的结论是,在许多情况下,校准的消费者数码相机与鱼眼镜头提供了最好的关系之间的易用性和丰富的可获得的信息的夜空。虽然他们没有获得完整的光谱信息,但他们能够在几分钟内对整个天空进行采样,并在三个波段中提供颜色信息。这一点很重要,因为考虑到灯光谱的当前全球变化,仅用单波段设备观察到的天空辐射变化可能导致关于天空亮度长期变化的错误结论。获取全天空信息是可取的,因为只有天顶信息并不能充分说明场址的特征。然而,只有天顶的单波段单通道设备,如天空质量计,仍然是长期研究夜空亮度和从移动平台进行研究的可行选择。要准确解释这些数据,需要对天空光的颜色组成有一定的了解。我们建议补充长期的时间序列得出这样的设备与定期全天空采样校准相机系统和校准照度计或亮度计。

英文摘要:

Measuring the brightness of the night sky has become an increasingly important topic in recent years, as artificial lights and their scattering by the Earths atmosphere continue spreading around the globe. Several instruments and techniques have been developed for this task. We give an overview of these, and discuss their strengths and limitations. The different quantities that can and should be derived when measuring the night sky brightness are discussed, as well as the procedures that have been and still need to be defined in this context. We conclude that in many situations, calibrated consumer digital cameras with fisheye lenses provide the best relation between ease-of-use and wealth of obtainable information on the night sky. While they do not obtain full spectral information, they are able to sample the complete sky in a period of minutes, with colour information in three bands. This is important, as given the current global changes in lamp spectra, changes in sky radiance observed only with single band devices may lead to incorrect conclusions regarding long term changes in sky brightness. The acquisition of all-sky information is desirable, as zenith-only information does not provide an adequate characterization of a site. Nevertheless, zenith-only single-band one-channel devices such as the Sky Quality Meter continue to be a viable option for long-term studies of night sky brightness and for studies conducted from a moving platform. Accurate interpretation of such data requires some understanding of the colour composition of the sky light. We recommend supplementing long-term time series derived with such devices with periodic all-sky sampling by a calibrated camera system and calibrated luxmeters or luminance meters.

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。

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