page_title: Sky quality meter
hierarchical_section_title: Sky quality meter
caption_attribution_description: English: SkyQualityMeterQM-L Français&#160;: SkyQualityMeterQM-L&#160;; L'apparition sur le marché de luxmètres portables, fiables et bon marché, adaptés aux besoins des astronomes et écologues permet à des astronomes, naturalistes, astrophotographes, professionnels ou amateurs, étudiants de produire des évaluations de qualité du ciel nocturne ou de la pollution lumineuse (ex&#160;: Jennifer Birriel, Jaclyn Wheatley, Christine McMichael, JAAVSO Volume 38, 2010&#160;; Documenting Local Night Sky Brightness Using Sky Quality Meters: An Interdisciplinary College Capstone Project and a First Step Toward Reducing Light Pollution PDF, 7 pages, en anglais&#160;; consulté 2010/12/11&#160;; Ceci est un exemple d'étude interdisciplinaire conduite dans le Kentuky par l'université de Capstone, ayant produit deux cartes de lectures luminosité du ciel au moyen de luxmètres Sky Quality Meter (SQM) dont avec lentille (SQM-LE))...de contribuer à cartographier la luminosité du ciel nocturne, le degré de pollution lumineuse ou de produire des indices de qualité de l'environnement nocturne . Des logiciels peuvent extraient la valeur instantanée mesurée par ces appareils et la convertissent en NELM (magnitude limite à l'oeil nu) ou génèrent automatiquement des graphes.
context_page_description: A sky quality meter is an instrument used to measure the luminance of the night sky. It is used, typically by amateur astronomers, to quantify the skyglow aspect of light pollution and uses units of "magnitudes per square arcsecond" favored by astronomers. SQM measurements can be submitted to a database on the manufacturer's website and to the citizen science project GLOBE at Night.
  There are several models of SQM made, offering different fields of view, and various automatic measurement and data logging or data communication capabilities. The current versions has only one band of observation, that can produce misinterpretations if the light pollution changes from sodium-vapor lamp to LED.
  The SQM is produced by the Canadian company Unihedron in Grimsby, Ontario.
context_section_description: A sky quality meter (SQM) is an instrument used to measure the luminance of the night sky. It is used, typically by amateur astronomers, to quantify the skyglow aspect of light pollution and uses units of "magnitudes per square arcsecond" favored by astronomers. SQM measurements can be submitted to a database on the manufacturer's website and to the citizen science project GLOBE at Night.
  There are several models of SQM made, offering different fields of view (i.e. measuring different angular areas on the sky), and various automatic measurement and data logging or data communication capabilities. The current versions has only one band of observation, that can produce misinterpretations if the light pollution changes from sodium-vapor lamp to LED.
  The SQM is produced by the Canadian company Unihedron in Grimsby, Ontario.
caption: Sky Quality Meter model SQM-L
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