Badescu, Viorel; Dumitrescu, Alexandru - In: Renewable Energy 66 (2014) C, pp. 118-131
based on ground-based estimates of point cloudiness (C, for short). Two models were proposed here for clear sky and overcast … error is good or good enough for all cloudiness classes. The spreading error is good for n = 0 ÷ 0.3; good enough for n = 0 … used in stations other than the origin one, for cloudiness classes n < 0.7. In case of skies with n = 0.3 ÷ 0.7, the …