Repository logo
 
Publication

Fast Fourier-transform calculation of artificial night sky brightness maps

2020-01Journal article Open access
Simple item page
dc.contributor.authorBará, Salvador
dc.contributor.authorFalchi, Fabio
dc.contributor.authorFurgoni, Riccardo
dc.contributor.authorLima, Raul Cerveira
dc.date.accessioned2019-10-28T12:53:01Z
dc.date.available2022-01-05T01:30:28Z
dc.date.issued2020-01
dc.description.abstractLight pollution poses a growing threat to optical astronomy, in addition to its detrimental impacts on the natural environment, the intangible heritage of humankind related to the contemplation of the starry sky and, potentially, on human health. The computation of maps showing the spatial distribution of several light pollution related functions (e.g. the anthropogenic zenithal night sky brightness, or the average brightness of the celestial hemisphere) is a key tool for light pollution monitoring and control, providing the scientific rationale for the adoption of informed decisions on public lighting and astronomical site preservation. The calculation of such maps from satellite radiance data for wide regions of the planet with sub-kilometric spatial resolution often implies a huge amount of basic pixel operations, requiring in many cases extremely large computation times. In this paper we show that, using adequate geographical projections, a wide set of light pollution map calculations can be reframed in terms of two-dimensional convolutions that can be easily evaluated using conventional fast Fourier-transform (FFT) algorithms, with typical computation times smaller than 10^-6 s per output pixel.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.jqsrt.2019.106658
dc.identifier.urihttp://hdl.handle.net/10400.22/14753
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPOCI-01-0145-FEDER-006922pt_PT
dc.relationCentre for Earth and Space Research of the University of Coimbra
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0022407319305540?via%3Dihubpt_PT
dc.subjectLight pollutionpt_PT
dc.subjectAtmospheric opticspt_PT
dc.subjectPhotometrypt_PT
dc.subjectRadiometrypt_PT
dc.subjectFourier transformspt_PT
dc.titleFast Fourier-transform calculation of artificial night sky brightness mapspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Earth and Space Research of the University of Coimbra
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F00611%2F2019/PT
oaire.citation.startPage106658pt_PT
oaire.citation.titleJournal of Quantitative Spectroscopy and Radiative Transferpt_PT
oaire.citation.volume240pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameLima
person.givenNameRaul
person.identifierR-000-Q5J
person.identifier.ciencia-idFD1B-60AD-BD2A
person.identifier.orcid0000-0001-7212-510X
person.identifier.ridI-3577-2013
person.identifier.scopus-author-id57188653495
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationcc2feb09-f794-4839-944b-41c4448bd590
relation.isAuthorOfPublication.latestForDiscoverycc2feb09-f794-4839-944b-41c4448bd590
relation.isProjectOfPublication0e41a31f-ba47-4114-815c-09f6f17c2f30
relation.isProjectOfPublication.latestForDiscovery0e41a31f-ba47-4114-815c-09f6f17c2f30

Files

Original bundle
Now showing 1 - 2 of 2
No Thumbnail Available
Name:
ART_Raúl Lima.pdf
Size:
981.42 KB
Format:
Adobe Portable Document Format
Download
No Thumbnail Available
Name:
TXT.txt
Size:
1.74 KB
Format:
Plain Text
Download

Collections

ESS - FIS - Artigos