DirectRadiation: Solar Direct Beam Radiation on Surface

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

Description

This function returns solar open direct beam dadiation (in W/m2) for a given day of year, location and topography.

Usage

DirectRadiation(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 atmospheric transmittance coefficient for two consecutive days on 45 degree
#latitude and 10 degree longitude and at 100 m altitude.

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

Sopen <- OpenRadiation(DOY, Lat = 45, Lon=10, SLon=10, DS=0, Elevation = 100)
#Note: only the difference between Lon and SLon matters not each value

plot(DOY, Sopen)

bnasr/solrad documentation built on May 20, 2019, 3:05 p.m.