Hi All,
I've built a DIY arduino based weather station and have all the hardware and Ascom driver working fine, but the last piece of the puzzle which i need to understand is the relationship between Sky Temp vs the Ambient Air temp to determine if it's cloudy or not.
i think i read somewhere once, that there is a direct relationship between the Air & Sky temps which determines if it's cloudy or not, and it's that bit i dont yet know.
All i know is that clear sky is supposed to create a bigger difference in temperatures, then cloudy which can get very close to ambient.
Anyone got any idea's on the approx temp differences ??
e.g. Clear Sky = (30 degree difference in temp ???)
Light / Whispy Cloud (15 degree difference in temp ??)
Full / Thick Cloud ( 5 degree difference in temp ??? )
Hope my question makes sense
Rich.