Read this page to learn how to take quantitative and quantitative assessments of night sky quality and track the presence of light pollution at your site.. Sky Quality Meter model SQM-L A sky quality meter (SQM) is an instrument used to measure the luminance of the night sky, more specifically the Night Sky Brightness (NSB) at the zenith, with a bandwidth ranging from 390 nm to 600 nm. [1] It is used, typically by amateur astronomers, to quantify the skyglow aspect of light pollution and uses units of ” magnitudes per square arcsecond ” favoured.
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Monitor sky brightness through the night, night-to-night, and year-to-year. Determine which nights show the greatest promise for finding the ‘faintest fuzzies’! Calibrate the effect of sky brightness on qualitative measures such as the Bortle Scale. Investigate how sky brightness correlates with the solar cycle and month-to-month sunspot activity.. Sky Quality Meters (SQM) SQM Monitoring Station SQM So what exactly is an SQM? SQM stands for sky quality meter. It is an instrument about the size of a cellphone that is pointed straight up to measure how dark the sky is at night. Based on internationally accepted standards, the SQM keeps a record of the measurement of darkness every 15 minutes.
