CSSRad returns the value of clear-sky solar radiation.
Usage
CSSRad(a_s = 0.25, b_s = 0.5, elev = NULL, R_a)
Value
The function returns the value of clear-sky solar radiation as a numeric scalar.
Arguments
a_s
Optional. A numeric scalar that denotes regression constant, expressing the fraction ofextraterrestrial radiation
reaching the earth on overcast days (n = 0). The default is a_s = 0.25.
b_s
Optional. A numeric scalar that denotes fraction of extraterrestrial radiation reaching the earth on clear days
(\(n = N\)). The default is b_s = 0.5
elev
Optional. A numeric scalar that denotes the elevation above the sea level [m].
R_a
A numeric scalar that denotes extraterrestrial radiation [\(MJ/(m^2\times day)\)]
This is a function to calculate the clear-sky solar radiation. The argument elev is needed when the calibrated values
of a_s and b_s are not available.