prep.date

<p>date-time object or Day of the year</p>

<p>Checks if x is date-time object or day of the year (doy) and returns doy.</p>

Meteorological Tools following the FAO56 irrigation paper of Allen et al. (1998) [1].
Functions for calculating:
reference evapotranspiration (ETref),
extraterrestrial radiation (Ra),
net radiation (Rn),
saturation vapor pressure (satVP),
global radiation (Rs),
soil heat flux (G),
daylight hours,
and more.
[1] Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. (1998). Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56. FAO, Rome, 300(9).

prep.date: Prepare date

Description

Usage

Arguments

Value