Daily extra-terrestrial radiation — Rad

Compute the daily extra-terrestrial radiation at a plane parallel to the earth surface ( $S0$ or $H0$ depending on the source) following Khorasanizadeh and Mohammadi (2016).

Rad_ext(DOY, Latitude, Gsc = Constants()$Gsc)

Arguments

DOY	Ordinal date (integer): day of year from 1st January (day)
Latitude	Latitude (deg)
Gsc	The solar constant (W m-2), default to `Constants()$Gsc` (= 1367).

Value

$S0$ , the daily extra-terrestrial radiation ( $MJ\ m^{-2}\ d^{-1}$ )

References

Khorasanizadeh, H. and K. Mohammadi, Diffuse solar radiation on a horizontal surface: Reviewing and categorizing the empirical models. Renewable and Sustainable Energy Reviews, 2016. 53: p. 338-362.

Examples

# Daily extra-terrestrial radiation on january 1st at latitude 35 N :
Rad_ext(DOY= 1,Latitude= 35)
#> [1] 16.9073