Night sky brightness simulation over Montsec protected area.
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| Title: | Night sky brightness simulation over Montsec protected area. |
|---|---|
| Authors: | Linares, Hector1,2 (AUTHOR) hlinarar17@alumnes.ub.edu, Masana, Eduard1 (AUTHOR), Ribas, Salvador J.1,2 (AUTHOR), Aubé, Martin3 (AUTHOR), Simoneau, Alexandre4 (AUTHOR), Bará, Salvador5 (AUTHOR) |
| Source: | Journal of Quantitative Spectroscopy & Radiative Transfer. Jul2020, Vol. 249, pN.PAG-N.PAG. 1p. |
| Subjects: | Sky brightness, Light pollution, Light sources, Absolute value, Weather |
| Geographic Terms: | Spain |
| Abstract: | • The light pollution numerical model Illumina v1 (Aube, 2007) has been used to simulate the sky brightness over the observatory of Montsec (Spain). • The simulations improves those presented in (Linares et al., 2018) due to the inclusion as light pollution sources many towns previously ignored. • The determination of which sources should be included in the calculus have been derived using the methodology presented by (Bara and Lima, 2018). The point spread function used in this paper is derived ad hoc using a simplified case with Illumina v1. • Simulated all sky brightness maps have a good correlation with measurements taken with ASTMON, SQC and SQM instrumentation in all the filters studied (B, V and R). Night sky brightness over Montsec Observatory (north-east of Spain) has been computed and checked against measurements using Illumina numerical model [2]. In a previous publication [20] the methodology was validated and light pollution received in the observatory coming from a unique city was computed. Here we present a simulation that includes all the sources that has a significant impact over the quality of the night sky in this area. The decision of which sources should be included in the simulations was taken following the methodology explained by [6]: using a point spread function (PSF) as a simple approach to estimate which sources are brightening the sky dome over the observer. An ad hoc PSF derived with Illumina was used with the purpose of avoiding to have to rely on already existing empirical PSF. The resulting PSF can be used in any location with similar atmospheric conditions. Differences in the spectrum of the lamps can be accounted easily by adjusting a spectrum scale factor. Illumina simulates the artificial sky brightness received (W/sr/m2) by an observer from any direction. Adding the natural sky brightness allows to compare the simulations to measurements taken with different instrumentation. In our case simulations were checked against ASTMON, SQC and SQM measurements. They show a good agreement both in absolute values and in geographical patterns for the three filters studied, B, V and R. The methodology presented opens many possibilities, such as increasing the reliability of the maps that point out the light pollution main contributors for any location, and reducing the amount of time needed to perform an accurate simulation of the night sky brightness. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Quantitative Spectroscopy & Radiative Transfer is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 143722871 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Night sky brightness simulation over Montsec protected area. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Linares%2C+Hector%22">Linares, Hector</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> hlinarar17@alumnes.ub.edu</i><br /><searchLink fieldCode="AR" term="%22Masana%2C+Eduard%22">Masana, Eduard</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ribas%2C+Salvador+J%2E%22">Ribas, Salvador J.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Aubé%2C+Martin%22">Aubé, Martin</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Simoneau%2C+Alexandre%22">Simoneau, Alexandre</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bará%2C+Salvador%22">Bará, Salvador</searchLink><relatesTo>5</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Quantitative+Spectroscopy+%26+Radiative+Transfer%22">Journal of Quantitative Spectroscopy & Radiative Transfer</searchLink>. Jul2020, Vol. 249, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Sky+brightness%22">Sky brightness</searchLink><br /><searchLink fieldCode="DE" term="%22Light+pollution%22">Light pollution</searchLink><br /><searchLink fieldCode="DE" term="%22Light+sources%22">Light sources</searchLink><br /><searchLink fieldCode="DE" term="%22Absolute+value%22">Absolute value</searchLink><br /><searchLink fieldCode="DE" term="%22Weather%22">Weather</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Spain%22">Spain</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: • The light pollution numerical model Illumina v1 (Aube, 2007) has been used to simulate the sky brightness over the observatory of Montsec (Spain). • The simulations improves those presented in (Linares et al., 2018) due to the inclusion as light pollution sources many towns previously ignored. • The determination of which sources should be included in the calculus have been derived using the methodology presented by (Bara and Lima, 2018). The point spread function used in this paper is derived ad hoc using a simplified case with Illumina v1. • Simulated all sky brightness maps have a good correlation with measurements taken with ASTMON, SQC and SQM instrumentation in all the filters studied (B, V and R). Night sky brightness over Montsec Observatory (north-east of Spain) has been computed and checked against measurements using Illumina numerical model [2]. In a previous publication [20] the methodology was validated and light pollution received in the observatory coming from a unique city was computed. Here we present a simulation that includes all the sources that has a significant impact over the quality of the night sky in this area. The decision of which sources should be included in the simulations was taken following the methodology explained by [6]: using a point spread function (PSF) as a simple approach to estimate which sources are brightening the sky dome over the observer. An ad hoc PSF derived with Illumina was used with the purpose of avoiding to have to rely on already existing empirical PSF. The resulting PSF can be used in any location with similar atmospheric conditions. Differences in the spectrum of the lamps can be accounted easily by adjusting a spectrum scale factor. Illumina simulates the artificial sky brightness received (W/sr/m2) by an observer from any direction. Adding the natural sky brightness allows to compare the simulations to measurements taken with different instrumentation. In our case simulations were checked against ASTMON, SQC and SQM measurements. They show a good agreement both in absolute values and in geographical patterns for the three filters studied, B, V and R. The methodology presented opens many possibilities, such as increasing the reliability of the maps that point out the light pollution main contributors for any location, and reducing the amount of time needed to perform an accurate simulation of the night sky brightness. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Quantitative Spectroscopy & Radiative Transfer is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jqsrt.2020.106990 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Sky brightness Type: general – SubjectFull: Light pollution Type: general – SubjectFull: Light sources Type: general – SubjectFull: Absolute value Type: general – SubjectFull: Weather Type: general – SubjectFull: Spain Type: general Titles: – TitleFull: Night sky brightness simulation over Montsec protected area. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Linares, Hector – PersonEntity: Name: NameFull: Masana, Eduard – PersonEntity: Name: NameFull: Ribas, Salvador J. – PersonEntity: Name: NameFull: Aubé, Martin – PersonEntity: Name: NameFull: Simoneau, Alexandre – PersonEntity: Name: NameFull: Bará, Salvador IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2020 Type: published Y: 2020 Identifiers: – Type: issn-print Value: 00224073 Numbering: – Type: volume Value: 249 Titles: – TitleFull: Journal of Quantitative Spectroscopy & Radiative Transfer Type: main |
| ResultId | 1 |
