Tracking the dynamics of skyglow with differential photometry using a digital camera with fisheye lens

Andreas Jechow, Salvador J. Ribas, Ramon Canal Domingo, Franz Hölker, Z. Kolláth, Christopher C.M. Kyba

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Artificial skyglow is dynamic due to changing atmospheric conditions and the switching on and off of artificial lights throughout the night. Street lights as well as the ornamental illumination of historical sites and buildings are sometimes switched off at a certain time to save energy. Ornamental lights in particular are often directed upwards, and can therefore have a major contribution towards brightening of the night sky. Here we use differential photometry to investigate the change in night sky brightness and illuminance during an automated regular switch-off of ornamental light in the town of Balaguer and an organized switch-off of all public lights in the village of Àger, both near Montsec Astronomical Park in Spain. The sites were observed during two nights with clear and cloudy conditions using a DSLR camera and a fisheye lens. A time series of images makes it possible to track changes in lighting conditions and sky brightness simultaneously. During the clear night, the ornamental lights in Balaguer contribute over 20% of the skyglow at zenith at the observational site. Furthermore, we are able to track very small changes in the ground illuminance on a cloudy night near Àger.

Original languageEnglish
Pages (from-to)212-223
Number of pages12
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume209
DOIs
Publication statusPublished - Apr 1 2018

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Photometry
digital cameras
Digital cameras
luminaires
photometry
Lenses
night
lenses
sky brightness
night sky
illuminance
switches
Luminance
Lighting
Switches
streets
zenith
Spain
meteorology
illuminating

Keywords

  • Light pollution
  • Night sky brightness
  • Photometry

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

Cite this

Tracking the dynamics of skyglow with differential photometry using a digital camera with fisheye lens. / Jechow, Andreas; Ribas, Salvador J.; Domingo, Ramon Canal; Hölker, Franz; Kolláth, Z.; Kyba, Christopher C.M.

In: Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 209, 01.04.2018, p. 212-223.

Research output: Contribution to journalArticle

Jechow, Andreas ; Ribas, Salvador J. ; Domingo, Ramon Canal ; Hölker, Franz ; Kolláth, Z. ; Kyba, Christopher C.M. / Tracking the dynamics of skyglow with differential photometry using a digital camera with fisheye lens. In: Journal of Quantitative Spectroscopy and Radiative Transfer. 2018 ; Vol. 209. pp. 212-223.
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