Analysis of the Diffuse Fraction from Solar Radiation Values Measured in Argentina and Brazil Sites
Abstract
The knowledge of the spatio-temporal characteristics of the components of solar radiation is of importance to optimize its application, mainly for the Direct component, which is the one that can be concentrated. But, since most of the meteorological stations in the region only measure Global radiation, the correlations between it and the Diffuse component are studied. In this way, from the measured values of Global solar radiation, the Diffuse component can be estimated, and the horizontal Direct component can be calculated. In this paper, values of Global and Diffuse fractions measured in La Quiaca (Argentina) and Araripina (Brazil) are analyzed, with a recording frequency of 1 minute, adjusted according to a sigmoidal function. The climatic and orographic differences between both sites are reflected in the results obtained.