The function calculates solar declination, which is the angular distance of the sun north or south of the earth’s equator, based on the day of year Campbell1998TrenchR.
Usage
dec_angle(doy)
Value
numeric declination angle (radians).
Arguments
doy
numeric day of year (1-366). This can be obtained from standard date via day_of_year.
References
See Also
Other utility functions:
airpressure_from_elev(),
azimuth_angle(),
day_of_year(),
daylength(),
solar_noon(),
temperature conversions,
zenith_angle()