Metdata                 Weather data
ap                      Angstrom-Prescott solar radiation model
apcal                   Calibrate Angstrom-Prescott model
bc                      Bristow-Campbell model
bcauto                  Auto-calibrate Bristow-Campbell model
bccal                   Calibrate Bristow-Campbell model
cst                     Estimate clear sky transmissivity
cstRead                 Read values of clear sky transmissivity
dayOfYear               Convert 'Date' to number of day in a year
degrees                 Convert radians to degrees
deltaVP                 Slope of saturation vapour pressure curve
es                      Mean saturation vapour pressure
et0                     FAO Penman-Monteith evapotranspiration equation
extrat                  Calculate extraterrestrial solar radiation
ha                      Hargreaves solar radiation model
hacal                   Calibrate Hargreaves model
hauto                   Auto-calibrate Hargreaves model
mh                      Mahmood-Hubbard solar radiation model
modeval                 Model performance statistics.
psychC                  Psychrometric constant
radians                 Convert degrees to radians
rnl                     Net longwave radiation
rns                     Net shortwave radiation
sirad-package           Functions for calculating daily solar radiation
                        and evapotranspiration
su                      Supit-Van Kappel solar radiation model
sucal                   Calibrate Supit-Van Kappel model
wind2                   Convert wind speed measured at a certain height
                        to the wind speed at 2 meters
