computeSunPositionDoyHour: computeSunPositionDoyHour

In solartime: Utilities Dealing with Solar Time Such as Sun Position and Time of Sunrise

Description

Compute the position of the sun (solar angle)

Usage

computeSunPositionDoyHour(doy, hour, latDeg, 
    longDeg = NA, timeZone = NA, isCorrectSolartime = TRUE)

Arguments

doy	integer vector with day of year [DoY, 1..366], same length as Hour or length 1
hour	numeric vector with local winter time as decimal hour [0..24)
latDeg	Latitude in (decimal) degrees
longDeg	Longitude in (decimal) degrees
timeZone	Time zone (in hours) ahead of UTC (Central Europe is +1)
isCorrectSolartime	by default corrects hour (given in local winter time) for latitude to solar time (where noon is exactly at 12:00). Set this to FALSE if times are specified already as solar times.

Details

This code assumes that Hour is given in local winter time zone. By default, it corrects by longitude to solar time (where noon is exactly at 12:00). Set argument isCorrectSolartime to FALSE to use the given local winter time instead.

Value

named numeric matrix with one row for each time with entries

hour	Solar time in fractional hours after midnight, (or given hour if isCorrectSolartime = FALSE).
declination	Solar declination (rad)
elevation	Solar elevation (rad) with 0 at horizon increasing towards zenith
azimuth	Solar azimuth (rad) with 0 at North increasing eastwards

Author(s)

Thomas Wutzler

Examples

computeSunPositionDoyHour(
  160, hour = 0:24, latDeg = 51, longDeg = 13.6, timeZone = 1L)

solartime documentation built on April 22, 2021, 5:10 p.m.