N. Copernicus Observatory and Planetarium in Brno:
light and weather overview

Theoretical clear-sky natural horizontal illuminances by Sun (with its angular heights 0, -6, -12 and -18 degrees marked) and Moon, and of measured data. Temperatures, pressure, precipitation and wind are shown too, eventually. With new data plotted at the top, the graphs are aligned right-to-left, so that almost continuous curves appear (using axes where time increases to the right as usual).

snow wiped away from PV panel at 11 h 1/2 cm snow wiped away after 11 h new cable connected around 13 h dew wiped away before 9 h snow-obscured detector at late night, during clear sky two showers, clear air late night, cold PV before noon shift from UTC+2h to UTC+1h dew with dirt wiped away at 9:12