jorgelbachiller

Hi, I have the same problem with the clearness index and I have check the calibration and the units. This data come from a wheather station which is weekly maintenance because we are alse checking the soiling on syte project. I have import this data asPVsyst standard format. (GHI and temperature) The weather station has two horizontal pyranometers and other one on the inclined plane. Moreover, I have 2 panel which are checking the soiling, one photo cell. All of the have a normal range of irradiance.