UV Index estimation from global radiation and total ozone observations in Azores

A method for UV Index estimation from global radiation and total ozone observations is described. The method was calibrated with simultaneously measurements carried out by Brewer spectrophotometer (for UV and ozone) and pyranometer (global radiation) as part of the AZONET (AZores Observation NETwork) Setup in the José Agostinho Observatory. Results show a good adjustment (r = 0.97) with a standard deviation of 0.5 for the UV Index estimation, small enough to be used for public information in a real-time basis