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The article presents a study on the proposed empirical models for ultraviolet total (UVT) radiation. The study uses the measurement of UVT radiation from February 2001 to June 2008 in Valladolid, Spain, the empirical models that lack radiometric variables, and the global radiation measures and parameters of ultraviolet radiation. The study shows that the empirical models had presented that solar elevation cannot determine UV radiation, and the global radiation model elaborated the UVT model.