Solar: Calculating Solar Variables

In solrad: Calculating Solar Radiation and Related Variables Based on Location, Time and Topographical Conditions

Description

This function calculates solar variables including radiation components, solar angles and positions and day length.

Usage

Solar(DOY, Lat, Lon, SLon, DS, Elevation, Slope, Aspect)

Arguments

DOY	Day of year
Lat	Latitude (in degrees)
Lon	Longitude in degrees
SLon	Standard longitude (based on time zone) in degrees
DS	Daylight saving in minutes
Elevation	Elevation of the site in meters
Slope	Site slope in degrees
Aspect	Site aspect with respect to the south in degrees

Examples

#Calculating solar variables and angles

DOY <- seq(0, 2, .05)

solar <- Solar(DOY, Lat = 45, Lon=10, SLon=10, DS=0, Elevation = 1000, Slope = 10, Aspect = 0)
#Note: only the difference between Lon and SLon matters not each value

par(mfrow=c(3,1))
plot(DOY, solar$Altitude, ylim = c(-90,90))
plot(DOY, solar$Azimuth, col= 'red')

plot(DOY, solar$Sdiropen)
lines(DOY, solar$Sdifopen, col='red')

solrad documentation built on May 2, 2019, 12:38 p.m.