sirad (version 2.0-2)

sirad-package: Functions for calculating daily solar radiation and avapotranspiration

Description

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

Details

ll{ Package: sirad Type: Package Version: 2.0-2 Date: 2012-08-21 License: GPL-2 LazyLoad: yes } This package provides functions to calculate daily solar radiation at horizontal surface using several well-known models (Bristow&Campbell, Hargreaves, Supit-Van Kappel, Mahmood-Hubbard, Angrstrom-Prescott). It also includes functions for model calibration based on groud-truth data as well as a function for auto-calibration.

Examples

require(zoo)
data(Metdata)
A <- 0.21
B <- 0.57
sunshine <- Metdata$meteo$SUNSHINE
days <- Metdata$meteo$DAY
lat <- Metdata$LATITUDE
plot(zoo(ap(days=days,lat=lat,A=A,B=B,SSD=sunshine),order.by=days))