This report presents the background information, procedures and results of the intercomparison of erythemal UV sensors carried out at the Central Observatory of Buenos Aires (OCBA) in 2018 against reference radiometers calibrated at the World Radiation Center (PMOD/WRC) in Davos during 2017. In this way, the data obtained at the measurement sites will be standardized and will be comparable locally and globally. Twenty sensors were calibrated, belonging to Argentine monitoring and research institutions. The associated relative uncertainty of each sensor was also estimated.
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