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dc.contributor.authorBalenzategui, Josées
dc.contributor.authorDe Lucas Veguillas, Javieres
dc.contributor.authorCuenca Alba, Josées
dc.contributor.authorGonzález Leiton, Ana Maríaes
dc.contributor.authorMolero García, Maríaes
dc.contributor.authorFabero, Fernandoes
dc.contributor.authorSilva, J. P.es
dc.contributor.authorMejuto, E.es
dc.contributor.authorMuñoz, R.es
dc.contributor.authorArce, A.es
dc.date.accessioned2023-02-21T10:35:30Z-
dc.date.available2023-02-21T10:35:30Z-
dc.date.issued2022-08-12-
dc.identifier.citationMeasurement Science and Technology 33(11): 115009es
dc.identifier.issn0957-0233-
dc.identifier.otherhttps://iopscience.iop.org/article/10.1088/1361-6501/ac849des
dc.identifier.urihttp://hdl.handle.net/20.500.12666/838-
dc.description.abstractSolar-type cavity radiometers are instruments of the highest metrological level for measuring solar direct normal irradiance. To ensure their traceability and performance, they are periodically compared to the World Group of Standards, which realizes the World Radiometric Reference (WRR), in the International Pyrheliometer Comparisons (IPCs). Additionally, they can be characterized in an absolute way, with direct traceability to SI units and with their measurement uncertainty calculated. This paper describes the different techniques and procedures applied for the characterization and calibration of solar cavity radiometers, with the main results obtained to date in the case of an Automatic Hickey–Frieden (AHF) radiometer. Voltmeters, resistors, temperature sensors and the area of the precision apertures have been calibrated, while the effective absorptance, temperature coefficients, optical scattering and non-equivalence factor have been evaluated. The temperature dependence of the electrical current in the cavity heater has also been analysed. The resulting corrections obtained for the AHF by characterization are compatible with the WRR factors obtained by this instrument in the past IPCs. An uncertainty of 0.42% (k = 1) has been obtained, and this paper discusses further improvements that may be able to reduce this figure to the desired expanded uncertainty of U = 0.1% (k = 2).es
dc.language.isoenges
dc.publisherIOP Science Publishinges
dc.titleCharacterization of absolute cavity radiometers for traceability to SI of solar irradiancees
dc.typeinfo:eu-repo/semantics/articlees
dc.identifier.doi10.1088/1361-6501/ac849d-
dc.identifier.e-issn1361-6501-
dc.contributor.funderInstituto Nacional de Técnica Aeroespacial (INTA)es
dc.description.peerreviewedPeerreviewes
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccesses
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es
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