dc.identifier.uri |
http://dx.doi.org/10.15488/5 |
|
dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/23 |
|
dc.contributor.author |
Thosing, Korntip
|
|
dc.contributor.author |
Schrempf, Michael
|
|
dc.contributor.author |
Riechelmann, Stefan
|
|
dc.contributor.author |
Seckmeyer, Gunther
|
|
dc.date.accessioned |
2015-07-27T09:29:56Z |
|
dc.date.available |
2015-07-27T09:29:56Z |
|
dc.date.issued |
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:http://dx.doi.org/10.5194/amt-7-2137-2014 |
|
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 |
http://creativecommons.org/licenses/by/3.0/de/ |
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.relation.doi |
http://dx.doi.org/10.5194/amt-7-2137-2014 |
|
dc.description.version |
publishedVersion |
|
tib.accessRights |
frei zug�nglich |
|