Sun Position

Version 2.1.1 (334 KB) by Jeff Dozier
Contains functions for declination, solar longitude, radius vector, equation of time, times of sunrise and sunset, sun angles and azimuths.
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Updated 22 Mar 2023

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Uses the distance function from the MATLAB Mapping Toolbox to calculate the arc distance to the sub-solar location. Includes checkSizes function from my general function library.
EarthEphemeris - Returns the solar declination, Earth-Sun radius vector (distance in astronomical units), solar longitude, and optionally the equation of time.
sunang - Returns cosine of sun angle, its azimuth (0 south, + east), and airmass (path length accounting for Earth curvature). Optionally accounts for refraction.
sunRiseSet - Times of sunrise and sunset.
sunslope - Cosine of illumination angle on slope

Cite As

Jeff Dozier (2025). Sun Position (https://au.mathworks.com/matlabcentral/fileexchange/126625-sun-position), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2022b
Compatible with R2014b and later releases
Platform Compatibility
Windows macOS Linux
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Version Published Release Notes
2.1.1

I modified the date handling to follow MATLAB guidance on "Replace Discouraged Instances of Serial Date Numbers and Date Strings."
2.1