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sirad

Functions for Calculating Daily Solar Radiation and Evapotranspiration

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.

Functions (27)

Weather data

Angstrom-Prescott solar radiation model

Calibrate Angstrom-Prescott model

Bristow-Campbell model

Auto-calibrate Bristow-Campbell model

Calibrate Bristow-Campbell model

cst

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

et0

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

rnl

Net longwave radiation

rns

Net shortwave radiation

sirad-package

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 meters

sirad

Functions for Calculating Daily Solar Radiation and Evapotranspiration

v2.3-3

GPL-2

Authors

Jedrzej S. Bojanowski

Initial release

2016-10-17

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