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Intercomparison of spectroradiometers for global and direct solar irradiance in the visible range.

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Intercomparison of spectroradiometers for global and direct solar irradiance in the visible range.

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dc.contributor.author	Martínez Lozano, José Antonio
dc.contributor.author	Utrillas Esteban, María Pilar
dc.contributor.author	Pedrós Esteban, Roberto
dc.contributor.author	Tena Sangüesa, Fernando
dc.contributor.author	Díaz, Juan P.
dc.contributor.author	Expósito, Francisco J.
dc.contributor.author	Lorente, Jerónimo
dc.contributor.author	Cabo, Xavier de
dc.contributor.author	Cachorro, Victoria
dc.contributor.author	Vergaz, Ricardo
dc.contributor.author	Carreño, Virgilio
dc.date.accessioned	2015-07-03T08:34:40Z
dc.date.available	2015-07-03T08:34:40Z
dc.date.issued	2003
dc.identifier.citation	Martínez Lozano, José Antonio Utrillas Esteban, María Pilar Pedrós Esteban, Roberto Tena, Fernando Díaz, Juan P. Expósito, Francisco J. Lorente, Jerónimo Cabo, Xavier de Cachorro, Victoria Vergaz, Ricardo Carreño, Virgilio 2003 Intercomparison of spectroradiometers for global and direct solar irradiance in the visible range. Journal of Atmospheric and Oceanic Technology 20 7 997 1010
dc.identifier.uri	http://hdl.handle.net/10550/45022
dc.description.abstract	This paper presents the results of the analysis of the spectral, global, and direct solar irradiance measurements in the visible range (400<br>700 nm) that were made in the framework of the first Iberian UV<br>visible (VIS) instruments intercomparison. The instruments used in this spectral range were four spectroradiometers: three Licor 1800s equipped with different receiver optics and one Optronic 754. For the direct solar irradiance measurements the spectroradiometers were equipped with collimators with different fields of view. Parallel studies have been carried out with the data given by the spectroradiometers with their original calibration file and with the same data that is corrected, following in situ calibration of the instruments using a laboratory reference lamp. To compare the series of spectral data the relative values of mean absolute deviation (MAD) and root-mean-square deviation (rmsd) have been used. The results obtained from the measurements of global irradiance show that the Licor 1800s presented very significant differences at the beginning and at the end of the day due to the deviation from ideal cosine response of the collection optics (i.e., cosine errors). This forced the analysis to be limited to the measurements corresponding to solar elevations higher than 30°. For this solar elevation range, the results of the intercomparison between the Licor instruments, before their in situ calibration, showed differences of about 5% in the visible range. The results from the measurements of direct irradiance show that, if correction factors are considered, these deviations are reduced to 3%, and when the Licors are compared with the Optronic, the deviations are less than 2%.
dc.language.iso	eng
dc.relation.ispartof	Journal of Atmospheric and Oceanic Technology, 2003, vol. 20, num. 7, p. 997-1010
dc.subject	Radiació solar
dc.title	Intercomparison of spectroradiometers for global and direct solar irradiance in the visible range.
dc.type	journal article	es_ES
dc.date.updated	2015-07-03T08:34:40Z
dc.identifier.doi	10.1175/1457.1
dc.identifier.idgrec	000287
dc.rights.accessRights	open access	es_ES