Validation of spectral sky radiance derived from all-sky camera images - a case study

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dc.identifier.uri Thosing, Korntip Schrempf, Michael Riechelmann, Stefan Seckmeyer, Gunther 2015-07-27T09:29:56Z 2015-07-27T09:29:56Z 2014
dc.identifier.citation Tohsing, Korntip; Schrempf, Michael; Riechelmann, Stefan; Seckmeyer, Gunther: Validation of spectral sky radiance derived from all-sky camera images - a case study. In: Atmospheric Measurement Techniques 7 (2014), Nr. 7, S. 2137-2146. DOI:
dc.description.abstract Spectral sky radiance (380–760 nm) is derived from measurements with a hemispherical sky imager (HSI)system. The HSI consists of a commercial compact CCD (charge coupled device) camera equipped with a fish-eye lens and provides hemispherical sky images in three reference bands such as red, green and blue. To obtain the spectral sky radiance from these images, non-linear regression functions for various sky conditions have been derived. The camera-based spectral sky radiance was validated using spectral sky radiance measured with a CCD spectroradiometer. The spectral sky radiance for complete distribution over the hemisphere between both instruments deviates by less than 20% at 500 nm for all sky conditions and for zenith angles less than 80 . The reconstructed spectra of the wavelengths 380–760 nm between both instruments at various directions deviate by less than 20% for all sky conditions. eng
dc.description.sponsorship DFG
dc.language.iso eng eng
dc.publisher Göttingen : Copernicus
dc.rights CC BY 3.0 Unported
dc.rights.uri eng
dc.subject CCD Camera eng
dc.subject Luminance Distributions eng
dc.subject Field-Measurements eng
dc.subject Optical-Properties eng
dc.subject Irradiance eng
dc.subject Algorithm eng
dc.subject Skylight eng
dc.subject View eng
dc.subject CCD Kamera ger
dc.subject Leuchtdichteverteilung ger
dc.subject Feldmessung ger
dc.subject Optische Eigenschaften ger
dc.subject Strahlung ger
dc.subject Algorithmus ger
dc.subject.classification Leuchtdichte ger
dc.subject.classification Himmelsstrahlung ger
dc.subject.ddc 550 | Geowissenschaften ger
dc.title Validation of spectral sky radiance derived from all-sky camera images - a case study eng
dc.type Article
dc.type Text
dc.relation.essn 1867-8548
dc.relation.issn 1867-1381
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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