Surface UV radiation monitoring at two Italian Brewer stations (Rome and Ispra): a first comparison with OMI data

Currently there is still low spatial coverage of ground-based instruments measuring UV irradiance (spectral or broad band) and the length of time over which reliable UV observations have been made is mainly around 10 years. Solar spectral irradiance (from 290 to 325 nm at 0.5 nm wavelength step) has been measured at the stations of Rome (41.9 degrees N, 12.5 degrees E, 75 m a.s.l.) and Ispra(45.8 degrees N, 8.6 degrees E, 240 m a.s.l.), by means of Brewer single monocromator spectrophotometer since 1992.