Equation for calculating the Sun's position

Asked Jul 10 '11 at 18:51

Active Jul 16 '11 at 19:43

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SunPosition Calculator calculates the Sun's postion based on the location and time. What is the equation used for such a calculation?

asked Jul 10 '11 at 18:51

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I gave an outline of that calculation in [the unusual sundial question]http://physics.stackexchange.com/q/24901) – Andrew Jul 10 '11 at 23:33

1 Answers1

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This function http://www.astro.washington.edu/docs/idl/cgi-bin/getpro/library28.html?ZENSUN is written in IDL, a programming language popular in the astronomy community. Although IDL is commercial software, the GNU Data Language is intended to be compatible and may help you work through the calculation if you want to port it to a different language.

answered Jul 16 '11 at 19:43

Larry OBrien

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