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sirad (version 2.0-7)

Functions for calculating daily solar radiation and evapotranspiration

Description

Package provides functions to calculate daily solar radiation at horizontal surface using several well-known models. It also includes functions for model calibration based on ground-truth data as well as a function for auto-calibration. The FAO Penmann-Monteith equation to calculate evapotranspiration is also included.

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Version

Install

install.packages('sirad')

Monthly Downloads

985

Version

2.0-7

License

GPL-2

Homepage

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

Maintainer

Jedrzej S Bojanowski

Last Published

January 23rd, 2013

Functions in sirad (2.0-7)

FAO Penman-Monteith evapotranspiration equation

Angstrom-Prescott solar radiation model

Clear sky transmissivity map

Net shortwave radiation

Mean saturation vapour pressure

Annual mean of cloud fraction cover

Read values of clear sky transmissivity

Convert degrees to radians

Bristow-Campbell model

Estimators of the model performance.

Functions for calculating daily solar radiation and avapotranspiration

Calibrate Bristow-Campbell model

Auto-calibrate Hargreaves model

Extract punctual data from CM SAF data.

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

Estimate clear sky transmissivity

Calibrate Supit-Van Kappel model

Net longwave radiation

Psychrometric constant

Calibrate Hargreaves model

Calibrate Angstrom-Prescott model

Auto-calibrate Bristow-Campbell model

Calculate extraterrestrial solar radiation

Convert radians to degrees

Mahmood-Hubbard solar radiation model

Convert 'Date' to number of day in a year

Supit-Van Kappel solar radiation model

Slope of saturation vapour pressure curve

Hargreaves solar radiation model