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sirad (version 2.3-1)

Functions for Calculating Daily Solar Radiation and Evapotranspiration

Description

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.

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Version

Install

install.packages('sirad')

Monthly Downloads

970

Version

2.3-1

License

GPL-2

Homepage

http://sirad.r-forge.r-project.org/

Maintainer

Jedrzej S Bojanowski

Last Published

December 12th, 2015

Functions in sirad (2.3-1)

Calibrate Bristow-Campbell model

Mean saturation vapour pressure

Slope of saturation vapour pressure curve

Angstrom-Prescott solar radiation model

Net shortwave radiation

Calibrate Angstrom-Prescott model

Mahmood-Hubbard solar radiation model

Convert degrees to radians

FAO Penman-Monteith evapotranspiration equation

Calculate extraterrestrial solar radiation

Convert 'Date' to number of day in a year

Psychrometric constant

Read values of clear sky transmissivity

Auto-calibrate Hargreaves model

Estimate clear sky transmissivity

Model performance statistics.

Net longwave radiation

Calibrate Supit-Van Kappel model

Supit-Van Kappel solar radiation model

Functions for calculating daily solar radiation and avapotranspiration

Convert wind speed measured at a certain height to the wind speed at 2 meters

Convert radians to degrees

Hargreaves solar radiation model

Auto-calibrate Bristow-Campbell model

Bristow-Campbell model

Calibrate Hargreaves model