Functions for Calculating Daily Solar Radiation and Evapotranspiration
Angstrom-Prescott solar radiation model
Calibrate Angstrom-Prescott model
Bristow-Campbell model
Auto-calibrate Bristow-Campbell model
Calibrate Bristow-Campbell model
Estimate clear sky transmissivity
Read values of clear sky transmissivity
Convert 'Date' to number of day in a year
Convert radians to degrees
Slope of saturation vapour pressure curve
Mean saturation vapour pressure
FAO Penman-Monteith evapotranspiration equation
Calculate extraterrestrial solar radiation
Hargreaves solar radiation model
Calibrate Hargreaves model
Auto-calibrate Hargreaves model
Mahmood-Hubbard solar radiation model
Model performance statistics.
Psychrometric constant
Convert degrees to radians
Net longwave radiation
Net shortwave radiation
Functions for calculating daily solar radiation and evapotranspiration
Supit-Van Kappel solar radiation model
Calibrate Supit-Van Kappel model
Convert wind speed measured at a certain height to the wind speed at 2...
Calculating daily global solar radiation at horizontal surface using several well-known models (i.e. Angstrom-Prescott, Supit-Van Kappel, Hargreaves, Bristow and Campbell, and Mahmood-Hubbard), and model calibration based on ground-truth data, and (3) model auto-calibration. The FAO Penmann-Monteith equation to calculate evapotranspiration is also included.
Useful links