cal_Rs_from_Na: Calculating Solar radiation from actual duration of sunshine

In simET: Tools for Simulation of Evapotranspiration of Field Crops and Soil Water Balance

Calculating Solar radiation from actual duration of sunshine

Description

Calculating Solar radiation from actual duration of sunshine

Usage

cal_Rs_from_Na(as = 0.25, bs = 0.5, Na, Latitude, J)

Arguments

as	regression constant, expressing the fraction of extraterrestrial radiation reaching the earth on overcast days (n = 0).Default is 0.25.
bs	as+bs is fraction of extraterrestrial radiation reaching the earth on clear days (n = N). Default is 0.50.
Na	actual duration of sunshine [hour].
Latitude	latitude (angert).
J	is the number of the day in the year between 1 (1 January) and 365 or 366 (31 December).

Value

A vector for solar radiation(MJ m-2 d-1)

References

Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. FAO Irrigation and drainage paper No. 56. Rome: Food and Agriculture Organization of the United Nations, 1998.

simET documentation built on Aug. 19, 2023, 5:09 p.m.