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Author Duriscoe, D.M.
Title Measuring Anthropogenic Sky Glow Using a Natural Sky Brightness Model. Type Journal Article
Year 2013 Publication Publications of the Astronomical Society of the Pacific Abbreviated Journal
Volume 125 Issue 933 Pages 1370-1382
Keywords (down) Skyglow
Abstract Anthropogenic sky glow (a result of light pollution) combines with the natural background brightness of the night sky when viewed by an observer on the earth’s surface. In order to measure the anthropogenic component accurately, the natural component must be identified and subtracted. A model of the moonless natural sky brightness in the V-band was constructed from existing data on the Zodiacal Light, an airglow model based on the van Rhijn function, and a model of integrated starlight (including diffuse galactic light) constructed from images made with the same equipment used for sky brightness observations. The model also incorporates effective extinction by the atmosphere and is improved at high zenith angles (>80°) by the addition of atmospheric diffuse light. The model may be projected onto local horizon coordinates for a given observation at a resolution of 0.05° over the hemisphere of the sky, allowing it to be accurately registered with data images obtained from any site. Zodiacal Light and integrated starlight models compare favorably with observations from remote dark sky sites, matching within ± 8 nL over 95% of the sky. The natural airglow may be only approximately modeled, errors of up to ± 25 nL are seen when the airglow is rapidly changing or has considerable character (banding); ± 8 nL precision may be expected under favorable conditions. When subtracted from all-sky brightness data images, the model significantly improves estimates of sky glow from anthropogenic sources, especially at sites that experience slight to moderate light pollution.
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Call Number LoNNe @ christopher.kyba @ Serial 539
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Author Andreić , Ž.; Andreić , D.; Pavlić , K.
Title Near infrared light pollution measurements in Croatian sites. Type Journal Article
Year 2012 Publication Geofizika Abbreviated Journal
Volume 29 Issue 2 Pages 143 - 156
Keywords (down) Skyglow
Abstract We investigate the light pollution (lP) in the near-infrared (NIR) part of the electromagnetic spectrum (700–1000 nm) for sites at low altitude, as typical for small observatories in this region. Our measurements show that considerable light pollution exists in the NIR. The increase of night sky brightness towards the horizon is often slightly slower in the NIR than in the visible. In cases when lP is mostly produced by high-pressure sodium lamps, the NIR part of light pollution is dominated by two close sodium spectral lines (818.3 and 819.5 nm) that can easily be filtered out with a dedicated filter. This can, however, change as sodium lamps are gradually replaced by metal-halide lamps whose spectra are complex, showing many lines over the whole visible/infrared range. If in the future a change to lED light sources happens, lP in the NIR could be reduced drastically. last, but not least, the low altitude of observing sites, together with climate characteristics of the region, result in a lot more humidity and aerosols in the atmosphere, compared to a typical mountaintop observatory site. This, combined with proximity of the polluting sources to the observing sites, results in enhancing the lP, compared to the clear, dry atmospheric conditions of a mountaintop observatory.
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Call Number LoNNe @ christopher.kyba @ Serial 542
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Author Craine, E.R.; Craine, B.L.; Craine, P.R.; Craine, E.M.
Title The Light at Night Mapping Project: LAN MAP 1, the Tucson Basin Type Journal Article
Year 2012 Publication Society for Astronomical Sciences 2012 (proceedings) Abbreviated Journal
Volume 31 Issue Pages 139-145
Keywords (down) Skyglow
Abstract Tucson, Arizona, once billed as the Astronomical Capital of the World, has long been home to at least ten major astronomical institutions and facilities. The region also hosts numerous productive amateur observatories and professional-amateur astronomical collaborations. In spite of the implementation of progressive night time lighting codes, the continued growth of the region has arguably deprived Tucson of its title, and threatens the future of some if not all of these facilities. It has become apparent that there are several difficulties in regulating this lighting environment. It is not easy to model the actual effects of new or changed lighting fixtures, there are compelling economic conflicts that must be considered, and adherence to various guidelines is often ignored. Perhaps the most fundamental problem is that there have historically been no comprehensive measures of either light at night or sky brightness over the extended growth areas. What measurements do exist are inhomogeneous and poorly accessible spot measurements at some observatory sites. These have little to tell us about the actual light distributions in the overall region, and rarely are informative of the specific light sources that offend the observatory sites. Tucson remains, for the time, an important astronomical resource. Because of its astronomical and lighting code circumstances, it is an interesting and valuable laboratory for studying these issues. In this paper we introduce an innovative new 5-year project to comprehensively map both sky brightness and associated artificial lighting over extended areas of development in the vicinity of important astronomical institutions. We discuss the various vectors employed in data collection; we outline the protocols used for each methodology, give examples of the data collected, and discuss data analysis and conclusions. This program has been underway since January 2012, and has already produced results of interest to professional and amateur astronomers alike.
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Call Number LoNNe @ christopher.kyba @ Serial 543
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Author Hamidi, Z.S.; Abidin, Z.Z.; Ibrahim, Z.A.; Shariff, N.N.M.
Title Effect of light pollution on night sky limiting magnitude and sky quality in selected areas in Malaysia Type Journal Article
Year 2011 Publication Sustainable Energy & Environment (ISESEE), 2011 3rd International Symposium & Exhibition Abbreviated Journal
Volume Issue Pages 233-235
Keywords (down) Skyglow
Abstract We investigate the effect of light pollution as the important considerations that limits the quality of the sky brightness for the astronomical purpose. Selected sites that covered: Klang, Selangor, Merlimau Melaka, Ipoh, Perak ad Kuala Lipis, Pahang, Malaysia have been chosen in order to investigate the visual estimation magnitude for observing visible stars. The results also based on Bortle scale theory provides glimpses of potential quality of night sky quality that is currently lost in most urban area in Malaysia. From the results, Kuala Lipis, Pahang is the best candidate site for astronomical purpose with the range of magnitude from 20.3 till 21.5 magnitudes per arc second. Some recommendation for a better solution will also be discussed.
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Call Number LoNNe @ christopher.kyba @ Serial 544
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Author Lolkema, D.E.; Haaima, M.; den Outer, P.N.; Spoelstra, H.
Title Effects of meteorological and atmospheric parameters on night sky brightness Type Journal Article
Year 2011 Publication Report of the Netherlands National Institute for Public Health and the Environment (RIVM #680151002) Abbreviated Journal
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Keywords (down) Skyglow
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Call Number LoNNe @ kagoburian @ Serial 545
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