Modeling the artificial night sky brightness at short distances from streetlights

Contrary to some widespread intuitive belief, the night sky brightness perceived by the human eye or any other physical detector does not come (exclusively) from high in the sky. The detected brightness is built up from the scattered radiance contributed by all elementary atmospheric volumes along t...

Descripción completa

Detalles Bibliográficos
Autores: Bará Viñas, Salvador, Bao Varela, María del Carmen, Kocifaj, Miroslav
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad de Santiago de Compostela (USC)
Repositorio:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
Idioma:inglés
OAI Identifier:oai:minerva.usc.gal:10347/44240
Acceso en línea:https://hdl.handle.net/10347/44240
Access Level:acceso abierto
Palabra clave:Light pollution
Radiometry
Photometry
Outdoor lighting
id ES_7a6960bf133d63cf7cdba609161e35dc
oai_identifier_str oai:minerva.usc.gal:10347/44240
network_acronym_str ES
network_name_str España
repository_id_str
spelling Modeling the artificial night sky brightness at short distances from streetlightsBará Viñas, SalvadorBao Varela, María del CarmenKocifaj, MiroslavLight pollutionRadiometryPhotometryOutdoor lightingContrary to some widespread intuitive belief, the night sky brightness perceived by the human eye or any other physical detector does not come (exclusively) from high in the sky. The detected brightness is built up from the scattered radiance contributed by all elementary atmospheric volumes along the line of sight, starting from the very first millimeter from the eye cornea or the entrance aperture of the measuring instrument. In artificially lit environments, nearby light sources may be responsible for a large share of the total perceived sky radiance. We present in this paper a quantitative analytical model for the sky radiance in the vicinity of outdoor light sources, free from singularities at the origin, which provides useful insights for the correct design or urban dark sky places. It is found that the artificial zenith sky brightness produced by a small ground-level source detected by a ground-level observer at short distances (from the typical dimension of the source up to several hundred meters) decays with the inverse of the distance to the source. This amounts to a reduction of 2.5 mag/arcsec2 in sky brightness for every log10 unit increase of the distance. The effects of screening by obstacles are also discussedElsevierUniversidade de Santiago de Compostela. Departamento de Física AplicadaUniversidade de Santiago de Compostela. Instituto de Materiais (iMATUS)20222022-12-0520222022-12-05journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10347/44240reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostelainstname:Universidad de Santiago de Compostela (USC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2© 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:minerva.usc.gal:10347/442402026-06-15T12:47:27Z
dc.title.none.fl_str_mv Modeling the artificial night sky brightness at short distances from streetlights
title Modeling the artificial night sky brightness at short distances from streetlights
spellingShingle Modeling the artificial night sky brightness at short distances from streetlights
Bará Viñas, Salvador
Light pollution
Radiometry
Photometry
Outdoor lighting
title_short Modeling the artificial night sky brightness at short distances from streetlights
title_full Modeling the artificial night sky brightness at short distances from streetlights
title_fullStr Modeling the artificial night sky brightness at short distances from streetlights
title_full_unstemmed Modeling the artificial night sky brightness at short distances from streetlights
title_sort Modeling the artificial night sky brightness at short distances from streetlights
dc.creator.none.fl_str_mv Bará Viñas, Salvador
Bao Varela, María del Carmen
Kocifaj, Miroslav
author Bará Viñas, Salvador
author_facet Bará Viñas, Salvador
Bao Varela, María del Carmen
Kocifaj, Miroslav
author_role author
author2 Bao Varela, María del Carmen
Kocifaj, Miroslav
author2_role author
author
dc.contributor.none.fl_str_mv Universidade de Santiago de Compostela. Departamento de Física Aplicada
Universidade de Santiago de Compostela. Instituto de Materiais (iMATUS)
dc.subject.none.fl_str_mv Light pollution
Radiometry
Photometry
Outdoor lighting
topic Light pollution
Radiometry
Photometry
Outdoor lighting
description Contrary to some widespread intuitive belief, the night sky brightness perceived by the human eye or any other physical detector does not come (exclusively) from high in the sky. The detected brightness is built up from the scattered radiance contributed by all elementary atmospheric volumes along the line of sight, starting from the very first millimeter from the eye cornea or the entrance aperture of the measuring instrument. In artificially lit environments, nearby light sources may be responsible for a large share of the total perceived sky radiance. We present in this paper a quantitative analytical model for the sky radiance in the vicinity of outdoor light sources, free from singularities at the origin, which provides useful insights for the correct design or urban dark sky places. It is found that the artificial zenith sky brightness produced by a small ground-level source detected by a ground-level observer at short distances (from the typical dimension of the source up to several hundred meters) decays with the inverse of the distance to the source. This amounts to a reduction of 2.5 mag/arcsec2 in sky brightness for every log10 unit increase of the distance. The effects of screening by obstacles are also discussed
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-12-05
2022
2022-12-05
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10347/44240
url https://hdl.handle.net/10347/44240
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
instname:Universidad de Santiago de Compostela (USC)
instname_str Universidad de Santiago de Compostela (USC)
reponame_str Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
collection Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869411436154847232
score 15,811543

Similares en LA Referencia