SunRiseSet

MATLAB

Sun = SunRiseSet(JD, Lat, Long, illumDef);

Determines the sun position, right ascension and declination, equation of time, rise and set times, etc. for an given date

Parameters	Description
JD [array]	Julian Date
Lat [array]	Latitude position, valid between -75 to 75 (deg)
Long [array]	Longitude position (deg) - uses military convention which has east longitudes as > 0 and west longitudes as < 0.
illumDef [string]	(Optional) Definition of solar illumination other than the standard definition (90 deg 50 min). Choose between 'Civil' - 96 deg (twilight), 'Nautical' - 102 deg, or 'Astro' - 108 deg.

Return Values	Description
Sun [struct]	Contains the sun vector information
Sun.EqOfTime [array]	Solar Equation of Time (deg)
Sun.RtAsc [array]	Solar Right Ascension (deg)
Sun.Dec [array]	Solar Declination (deg)
Sun.Dist [array]	Solar Distance (m)
Sun.rS [array]	Solar position (m)
Sun.ECF [array]	Solar position in ECF reference (m)
Sun.Az [array]	Solar Azimuth (deg)
Sun.El [array]	Solar True Elevation (deg)
Sun.AtmEl [array]	Solar Refracted Elevation (deg)
Sun.cosZen [array]	Cosine of Zenith
Sun.SolarNoon.time [array]	Solar Noon [UT hr, min, sec]
Sun.SolarNoon.JD [array]	Solar Noon [UT Julian date]
Sun.Rise.time [array]	Sun Rise [UT hr, min, sec]
Sun.Rise.JD [array]	Sun Rise [UT Julian date]
Sun.Set.time [array]	Sun Set [UT hr, min, sec]
Sun.Set.JD [array]	Sun Set [UT Julian date]
Sun.SNEqOfTime [array]	Solar Noon Equation of Time (deg)
Sun.SNRtAsc [array]	Solar Noon Right Ascension (deg)
Sun.SNDec [array]	Solar Noon Declination (deg)

D. A. Vallado, Fundamentals of astrodynamics and applications. New York: McGraw-Hill, 1997.