Oliveira, Amauri P.; Escobedo, João F.; Machado, Antonio J. - In: Applied Energy 71 (2002) 1, pp. 59-73
Measurements of global and diffuse solar-radiation, at the Earth's surface, carried out from May 1994 to June 1999 in São Paulo City, Brazil, were used to develop correlation models to estimate hourly, daily and monthly values of diffuse solar-radiation on horizontal surfaces. The polynomials...