Quality Control Of Global Solar Radiation Using Sunshine Duration Hours

摘要

The aim of this study was to develop a new and automatic method for controlling the quality of daily global solar radiation, G_d using sunshine duration hours. The new method has three levels of tests: first, G_d is compared against daily extraterrestrial radiation that is received on a horizontal surface (0.03 × G_(od) ≤ G_d < G_(od) second, G_d should only exceed by a small amount of the daily clear sky irradiation that is observed under highly transparent clear skies (G_d < 1.1G_(cd)); and third, the method uses a series of persistence checks that utilize the relation between daily global solar radiation and relative sunshine duration hours. The method is capable of identifying systematic and non-systematic errors and its ability has been shown in three different climates including semi-arid, coastal humid and very arid climates.