computeSunPositionDoyHour: computeSunPositionDoyHour

Description

Compute the position of the sun (solar angle)

Usage

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

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

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.

Author

Thomas Wutzler

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.

Examples

Run this code

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

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