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Comparison of global UV spectral irradiance measurements between a BTS CCD-array and a Brewer spectroradiometer

dc.contributor.authorGonzález, Carmen
dc.contributor.authorVilaplana, Jose Manuel
dc.contributor.authorBogeat Sánchez-Piqueras, José Antonio
dc.contributor.authorSerrano, Antonio
dc.date.accessioned2026-03-19T12:01:33Z
dc.date.available2026-03-19T12:01:33Z
dc.date.issued2022-07-15
dc.descriptionThe contact author has declared that none of the authors has any competing interests.Publisher’s note: Copernicus Publications remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. González, C., Vilaplana, J. M., Bogeat, J. A., and Serrano, A.: Comparison of global UV spectral irradiance measurements between a BTS CCD-array and a Brewer spectroradiometer, Atmos. Meas. Tech., 15, 4125–4133, https://doi.org/10.5194/amt-15-4125-2022, 2022.
dc.description.abstractSpectral measurements of UV irradiance are of great importance for protecting human health as well as for supporting scientific research. To perform these measurements, double monochromator scanning spectroradiometers are the preferred devices thanks to their linearity and stray-light reduction. However, because of their high cost and demanding maintenance, CCD-array-based spectroradiometers are increasingly used for monitoring UV irradiance. Nevertheless, CCD-array spectroradiometers have specific limitations, such as a high detection threshold or stray-light contamination. To overcome these challenges, several manufacturers are striving to develop improved instrumentation. In particular, Gigahertz-Optik GmbH has developed the stray-light-reduced BTS2048-UV-S spectroradiometer series (hereafter “BTS”). In this study, the long-term performance of the BTS and its seasonal behavior, regarding global UV irradiance, was assessed. To carry out the analysis, BTS irradiance measurements were compared against measurements from the Brewer MK-III #150 scanning spectrophotometer during three campaigns. A total of 711 simultaneous spectra, measured under cloud-free conditions and covering a wide range of solar zenith angles (SZAs; from 14 to 70∘) and UV indexes (from 2.4 to 10.6), were used for the comparison. During the three measurement campaigns, the global UV spectral ratio BTS / Brewer was almost constant (at around 0.93) in the 305–360 nm region for SZAs below 70∘. Thus, the BTS calibration was stable during the whole period of study (∼ 1.5 years). Likewise, it showed no significant seasonal or SZA dependence in this wavelength region. Regarding the UV index, a good correlation between the BTS and the Brewer #150 was found, i.e., the dynamic range of the BTS is comparable to that of the Brewer #150. These results confirm the quality of the long-term performance of the BTS array spectroradiometer in measuring global UV irradiance.
dc.description.peerreviewedPeerreview
dc.description.sponsorshipThis work is part of the R+D+i grants (grant nos. RTI 2018-097332-B-C21 and RTI 2018-097332-B-C22) funded by MCIN/AEI/10.13039/501100011033/ and “ERDF A Way of Doing Europe”, as well as part of the projects GR18097 and IB18092 funded by Junta de Extremadura and “ERDF A Way of Doing Europe”.
dc.identifier.citationAtmospheric Measurement Techniques 15(13): 4125–4133
dc.identifier.doi10.5194/amt-15-4125-2022
dc.identifier.e-issn1867-1381
dc.identifier.issn1867-8548
dc.identifier.otherhttps://amt.copernicus.org/articles/15/4125/2022/
dc.identifier.urihttps://hdl.handle.net/20.500.12666/1791
dc.language.isoeng
dc.publisherEuropean Geosciences Union
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dc.relationESTUDIO EXPERIMENTAL DEL EFECTO DE LAS NUBES BAJAS EN EL PERFIL VERTICAL DE RADIACION
dc.relation.isreferencedby8, https://doi.org/10.5194/amt-14-4915-2021, 2021.
dc.rightsAttribution 4.0 International
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.license© Author(s) 2022
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleComparison of global UV spectral irradiance measurements between a BTS CCD-array and a Brewer spectroradiometer
dc.typeinfo:eu-repo/semantics/article
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
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oaire.awardNumberRTI2018-097332-B-C21
oaire.awardTitleESTUDIO EXPERIMENTAL DEL EFECTO DE LAS NUBES BAJAS EN EL PERFIL VERTICAL DE RADIACION
oaire.awardURIhttps://digitalpro.inta.es/handle/123456789/1472
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