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From: Henry C. Halboth (no email)
Date: Mon Jul 18 2005 - 13:28:39 EDT
A bit more complicated, but generally employed with the Time Sight is ...
hav Z = sec ho x sec L x sin 1/2S - ho x sin 1/2S -L, where ...
Z = azimith, named according to Latitude + meridian angle, E or W
ho = corrected altitude
L = Latitude
pd = polar distance
S = (ho + L + pd)/2
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