Intercomparison of erythemal broadband radiometers calibrated by seven UV calibration facilities in Europe and the USA

[摘要] A bi-lateral intercomparison of erythemal broadband radiometers was performedbetween seven UV calibration facilities. The calibrations provided by theinstruments owners were compared relative to the characterisation andcalibration performed at PMOD/WRC in Davos, Switzerland. The calibrationconsisted in the determination of the spectral and angular response of theradiometer, followed by an absolute calibration performed outdoors relativeto a spectroradiometer which provided the absolute reference.

The characterization of the detectors in the respective laboratories are ingood agreement: The determinations of the angular responses have deviationsbelow ±4% and the spectral responses agree within ±20%. A "blind"intercomparison of the erythemally weighted irradiances derived by therespective institutes and PMOD/WRC showed consistent measurements to within±2% for the majority of institutes. One institute showed slightlylarger deviation of 10%. The differences found between the differentinstrument calibrations are all within the combined uncertainty of thecalibration.

[学科分类] 大气科学