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From: Peter Fogg (no email)
Date: Thu Jul 14 2005 - 05:01:55 EDT
> From: Peter Fogg
> Sent: Monday, 11 July 2005 10:31 AM
> To:
> Subject: Re: Z tangent formula
>
> ... am interested in finding other formulas for the calculation
> of azimuth for comparison.
Have found this one:
Chuck Pettis' Azimuth equation:
AZ = acos ((sin D - (sin L * sin H) / (COs L * COs H))
where H = horizon height (degrees)
(The H has me puzzled. Perhaps it refers to Dip, or could it refer to
altitude?)
Here's another:
Z = cos^-1 * [sin Dec - sin Lat * sin h / cos Lat * cos h]
where h = vertical angle to the sun corrected for parallax and refraction
(h = altitude?)
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