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Date: Fri, 24 May 85 11:14:20 pdt
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Subject: Re:  sun(1)
Status: R

The program calculates some corrections for sunset and sunrise positions
based on the refraction of the air, parallax, and one other thing I
forget now.  The postion figures don't do the correction: I wimped out
because the refraction correction is a function of the height of the
sun above the horizon.  The sunrise and sunset are apparent times, 
you should remove the dt correction to find the "astronomical" times.
Try the first day of spring at dawn to see what I mean.  The sun should
come up almost exactly in the east, but it's apparent position is
different because of the corrections.

I hope this is understandable...

						Bob

