Solar Position Chart in Cartesian Coordinates

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This Demonstration charts the position of the Sun at a given time for a given location on Earth, expressed in Cartesian coordinates.
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Contributed by: Erik Mahieu (February 2012)
Open content licensed under CC BY-NC-SA
Snapshots
Details
Time zones are calculated from longitude.
snapshot 1: at the equator
snapshot 2: at the North Pole
snapshot 3: in the Southern Hemisphere
The equations used for declination and equation of time are from [1].
The equations used for altitude and azimuth are from [2].
References
U.S. National Oceanographic and Atmospheric Administration. "General Solar Position Calculations." (Jan 31, 2012) www.srrb.noaa.gov/highlights/sunrise/solareqns.PDF.
U.S. Naval Observatory. "Computing Altitude and Azimuth from Greenwich Apparent Sidereal Time." (Jun 14, 2011) aa.usno.navy.mil/faq/docs/Alt_Az.php.
Permanent Citation
"Solar Position Chart in Cartesian Coordinates"
http://demonstrations.wolfram.com/SolarPositionChartInCartesianCoordinates/
Wolfram Demonstrations Project
Published: February 9 2012