The erythemal radiometers of the Ultraviolet Monitoring Network of the Argentine Servicio Meteorológico Nacional were calibrated in an extensive <i>in situ</i> campaign from October 1998 to April 1999 with Austrian reference instruments. Methods to correct the influence of the location’s horizon and long-term detector changes are applied. The different terms that contribute to the measurement uncertainty are analyzed. The expanded uncertainty is estimated to be ±10% at 70° solar zenith angle (SZA) and ±6% for a SZA of <50°. We observed significant changes for some detectors over hours and days, reaching a maximum diurnal drift of ±5% at a SZA of 70° and a maximum weekly variation of ±4%.
© 2002 Optical Society of America
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.5630) Instrumentation, measurement, and metrology : Radiometry
Alexander Cede, Eduardo Luccini, Liliana Nuñez, and Rubén D. Piacentini, "Calibration and Uncertainty Estimation of Erythemal Radiometers in the Argentine Ultraviolet Monitoring Network," Appl. Opt. 41, 6341-6350 (2002)