ssd2rad {marelac} | R Documentation |
The function converts values of sunshine duration (in hours) to global radiation (in J/m2/s).
ssd2rad(S, doy, a = 0.25, b = 0.5, rho = 50.29)
S |
Sunshine duration (hours) |
doy |
Julian day (for northern hemisphere only) |
a, b, rho |
site specific conversion parameters, must be fitted to measured data. |
Estimated value of global radiaton in J/m2/s.
Don't forget to fit the function parameters to site specific values!
Dyck S and Peschke G., 1995. Grundlagen der Hydrologie. 3. Auflage. Verlag für Bauwesen, Berlin 1995, ISBN 3-345-00586-7.
coriolis
, viscosity
,
diffcoeff
, vertmean
,
gravity
ssd2rad(8, 120)