Meteoclub.gr

I have made a radiation shield for the temp-hum sensor, so as to test my Stevenson Screen.
I observed that at night the temp in the radiation shield was about 0,4oC to 0,8oC less than the Stevenson screen,
but during the day, the sun was rising the temp 0,2 c- 0,4oC higher than my Stevenson’s Screen. Both the radiation shield and the Stevenson Screen have a fan. Then I performed a second test without a fan at both radiation shield and the Stevenson screen, and I observed big differences during the day with the sun, the radiation shield gives higher temperatures, about 2oC - 2,5oC higher than the Stevenson screen. I thing here in Greece, the radiation shield works correctly only if it has a fan.