Azimuth: Solar Azimuth Angle

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

Description

This function returns solar azimuth angle (in degrees) for a given day of year and location. The solar azimuth angle is the angle of sun's ray measured in the horizental plane from due south

Usage

Azimuth(DOY, Lat, Lon, SLon, DS)

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

Examples

#Calculating solar azimuth angle for two consecutive days on 45 degree lat and 10 degree lon

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

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

plot(DOY, Az)

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