6. 雲層数と日射強度の変動周波数との関係

抄録

The daytime sky at Toyohashi city was observed every five seconds from June 2021 to May 2022 by using two all-sky cameras. Based on the images, the relationship between number of clouds layer and fluctuation of solar irradiance was statistically analyzed for every hour. Here, the clearness index was calculated with the solar irradiation from the pyranometer. The fluctuation component is evaluated with Fourier analysis. The results indicate that the magnitude of fluctuations increases with the increase of the number of the cloud layer.