Results 31 to 40 of about 4,658 (241)
NSKY-CD: A System for Cloud Detection Based on Night Sky Brightness and Sky Temperature
Remote Sensing, 2023 Cloud cover is important meteorological information that still requires expensive equipment to be monitored from the ground, especially at night. The use of artificial lights at night causes light pollution, and clouds amplify this by reflecting light ...
Luciano Massetti +2 more
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Towards an absolute light pollution indicator
Scientific Reports, 2022 The growing concern about the negative impact of artificial light at night on biodiversity and human health increases the need of defining a general indicator that could be used for characterizing light pollution as well as performing both spatial and ...
Philippe Deverchère +4 more
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Vertical Variability of Night Sky Brightness in Urbanised Areas
Quaestiones Geographicae, 2022 Excessive amounts of artificial light emitted into the lower atmosphere at night have already become an everyday feature of modern urban landscapes, and gradually also a phenomenon associated with areas located outside large human settlements.
Karpińska Dominika, Kunz Mieczysław
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AN ALL-SKY CATALOG OF BRIGHT M DWARFS [PDF]
The Astronomical Journal, 2011 We present an all-sky catalog of M dwarf stars with apparent infrared magnitude J<10. The 8,889 stars are selected from the ongoing SUPERBLINK survey of stars with proper motion >40 mas/yr, supplemented on the bright end with the TYCHO-2 catalog.
Lépine, Sébastien, Gaidos, Eric
openaire +2 more sources
International Journal of Digital EarthNature reserves play a key role in the conservation of habitats, species and ecosystems in China. However, the issue of light pollution within these reserves has not received well recognition. Whereas previous studies have investigated light pollution in
Meng Ji +3 more
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The Hamburg All-Sky Bright QSO Surveys [PDF]
International Astronomical Union Colloquium, 2002 AbstractOver the past decade, our team has pursued a quest to search for the optically brightest quasars in the entire extragalactic sky, by means of automated quasar selection using digitised objective prism spectra. We give a brief overview over the observational database and selection strategies and present some of the major survey ...
Reimers, Dieter +1 more
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METHOD OF THE ATMOSPHERE BRIGHTNESS TEMPERATURE MEASURING AT FREQUENCIES AROUND 100 GHZ [PDF]
Radio Physics and Radio AstronomySubject and Purpose. The improvement of the atmosphere brightness temperature measuring method at frequencies of about 100 GHz is considered. The possibilities of the atmospheric carbon monoxide (CO) remote sensing instrument, developed at Institute of ...
A. M. Korolev +4 more
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Sky Brightness at the Kitt Peak National Observatory [PDF]
International Astronomical Union Colloquium, 1989 ABSTRACTWe report on the results of a program to measure the brightness of the night sky at the Kitt Peak National Observatory during the recent minimum in the solar cycle, a time noted for the darkest nighttime skies. We have measured sky brightness using a 0.9-meter telescope with a photoelectric photometer on seven nights in 1986 and the first half ...
Catherine A. Pilachowski +3 more
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Light pollution in the Tatra National Park [PDF]
Archives of Environmental ProtectionLight pollution in the form of artificial sky glow affects not only the immediate surroundings of the towns that generate it but also more distant areas, including protected regions. This study examines the extent of the impact of the artificial sky glow,
Tomasz Ściężor +2 more
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Chiral Phase Change Nanomaterials
Advanced Functional Materials, EarlyView.This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow +11 more
wiley +1 more source