|
|
Subject: Re: Direct methods for finding position
From: Herbert Prinz (hprinz@XXX.XXX)
Date: Mon Apr 15 2002 - 00:43:53 EDT
Arthur,
D = declination
L = latitude
T = local hour angle (t as in time)
Sorry for forgetting to mention this. The formula is, in fact, the one for
computed altitude as taught by the USPS or in the better books on
navigation.
A diagram for and full decription of the trigonometric method can be found
in Cotter's History of Nautical Astronomy, and also (slightly mislabeled) in
Susan P. Howell, Practical Celestial Navigation, 1987. The method of
Kotlaric (see Bowditch 1972, 1984) is also partly based on it.
I still owe you an answer re St. Hilaire. I was too busy during the weekend
removing the mildew from my boat after this by-far-too-warm winter.
Herbert
|