title: Spectral ultraviolet measurements by a multichannel monitor and a brewer spectroradiometer: a field study.
abstract: Two different instruments for measuring the spectral UV irradiance were used in a field comparison study in July 2000 in Rome, Italy: a Brewer spectrophotometer and a moderate-bandwidth filter radiometer (GUV-511C). The Brewer is designed to measure the solar spectral irradiances in the region from 290 nm to 325 nm with a spectral resolution of 0.5 nm. The GUV-511C measures hand-averaged spectral irradiance at four wavelengths: 305, 320, 340 and 380 nm with a bandwidth depending on the filter type for each channel (about 10 nm full width half maximum, FWHM). Comparisons between the two instruments were made for 5 days for the two wavelengths 305 and 320 nm under different meteorological conditions with the Brewer taken as the reference.
authors.affiliation: Istituto di Scienza dell'Atmosfera e del Clima, CNR, Area Tor Vergata, Rome, Italy.
authors.forename: I
authors.initials: I
authors.lastname: Di Menno
authors.forename: M L
authors.initials: ML
authors.lastname: Moriconi
authors.forename: M
authors.initials: M
authors.lastname: Di Menno
authors.forename: G R
authors.initials: GR
authors.lastname: Casale
authors.forename: A M
authors.initials: AM
authors.lastname: Siani
mesh_terms: D019544:Equipment Failure Analysis / Q000379:methods*; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D012015:Reference Standards; D015203:Reproducibility of Results; D012384:Rome; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000295:instrumentation* / Q000379:methods; D013472:Sunlight; D014466:Ultraviolet Rays