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Garden with Insight v1.0 Help: declination angle


The declination angle of the sun is the angle between the sun's rays and the earth's surface on any day of the year. It varies by a regular sine function as the earth travels around the sun and tilts slightly back and forth. It is used in the simulation to calculate day length.

gif/00000222.gif

How it works:
day length (EPIC explanation)

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 Updated: May 4, 1998. Questions/comments on site to webmaster@kurtz-fernhout.com.
Copyright © 1998 Paul D. Fernhout & Cynthia F. Kurtz.