# 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