Results 1 to 10 of about 4,658 (241)
Intercomparisons of Nine Sky Brightness Detectors [PDF]
Sensors, 2011 Nine Sky Quality Meters (SQMs) have been intercompared during a night time measurement campaign held in the Netherlands in April 2011. Since then the nine SQMs have been distributed across the Netherlands and form the Dutch network for monitoring night ...
Henk Spoelstra +5 more
doaj +8 more sources
Measurements of sky brightness at Bosscha Observatory, Indonesia [PDF]
Heliyon, 2020 To determine the level of light pollution due to human activities, we performed sky-brightness measurements at Bosscha Observatory, Indonesia (107°36′E; 6°49′S, 1300 m above sea level) for seven years from 2011 to 2018, using a portable photometer ...
D. Herdiwijaya +7 more
doaj +7 more sources
Evolution of Brightness and Color of the Night Sky in Madrid [PDF]
Remote Sensing, 2021 Major schemes to replace other streetlight technologies with Light-Emitting Diode (LED) lamps are being undertaken across much of the world. This is predicted to have important consequences for nighttime sky brightness and color.
José Robles +5 more
doaj +6 more sources
SG-WAS: A New Wireless Autonomous Night Sky Brightness Sensor [PDF]
Sensors, 2021 The main features of SG-WAS (SkyGlow Wireless Autonomous Sensor), a low-cost device for measuring Night Sky Brightness (NSB), are presented. SG-WAS is based on the TSL237 sensor –like the Unihedron Sky Quality Meter (SQM) or the STARS4ALL Telescope ...
Miguel R. Alarcon +5 more
doaj +4 more sources
Alteration of twilight sky brightness profile by light pollution [PDF]
Scientific Reports, 2023 The phenomenon of twilight has been stipulated as naturally dependent on the variables of solar depression, aerosol concentration and ozone composition.
Muhamad Syazwan Faid +6 more
doaj +4 more sources
Stability of the Nine Sky Quality Meters in the Dutch Night Sky Brightness Monitoring Network [PDF]
Sensors, 2015 In the context of monitoring abundance of artificial light at night, the year-to-year stability of Sky Quality Meters (SQMs) is investigated by analysing intercalibrations derived from two measurement campaigns that were held in 2011 and 2012.
Peter den Outer +5 more
doaj +4 more sources
Astrotourism and Night Sky Brightness Forecast: First Probabilistic Model Approach [PDF]
Sensors, 2019 Celestial tourism, also known as astrotourism, astronomical tourism or, less frequently, star tourism, refers to people’s interest in visiting places where celestial phenomena can be clearly observed.
Eleazar C-Sánchez +3 more
doaj +4 more sources
Linking solar minimum, space weather, and night sky brightness [PDF]
Scientific Reports, 2021 This paper presents time-series observations and analysis of broadband night sky airglow intensity 4 September 2018 through 30 April 2020. Data were obtained at 5 sites spanning more than 8500 km during the historically deep minimum of Solar Cycle 24 ...
Albert D. Grauer, Patricia A. Grauer
doaj +2 more sources
UBVRI night sky brightness at Kottamia Astronomical Observatory [PDF]
Scientific Reports, 2023 Photoelectric observations of night sky brightness (NSB) at different zenith distances and azimuths, covering all the sky, at the Egyptian Kottamia Astronomical observatory (KAO) site of coordinates ϕ = 29° 55.9′ N and λ = 31° 49.5′ E, were done using a ...
Mohamed F. Aboushelib +4 more
doaj +2 more sources
Long-Time Trends in Night Sky Brightness and Ageing of SQM Radiometers
Remote Sensing, 2022 A very wide-used instrument for the measurement of the Night Sky Brightness (NSB) is the Sky Quality Meter (SQM). One of its important issues is tracking NSB for long time and connecting its variations to changes in outdoor lighting.
Pietro Fiorentin +5 more
doaj +3 more sources