I was wondering it's possible to calculate a formula from the graph that I have attached below. (the purple line 85% RH can be ignored)
- coefficient = 1.7 at -10 degrees and 33 RH
- coefficient = 1.4 at 0 degrees and 33 RH
- coefficient = 1 at 20 degrees and 33 RH
- coefficient = 0.9 at 50 degrees and 33 RH
I would need the formula so that I could calculate the coefficient at any temperature knowing only Ro, Rs and the temperature.
E.g. how much will the coefficient be at -5 degrees? or how much at +15 degrees?