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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Shape of the Sun's daily motion
From: Brian Villmoare
Date: 2022 Feb 14, 01:35 -0800
From: Brian Villmoare
Date: 2022 Feb 14, 01:35 -0800
Frank,
Following on your and John's comments, I have tracked down this interesting paper by Cotter ('A Historical Review of the Ex-Meridian Problem'):
http://www.fer3.com/arc/imgx/Cotter_Ex_Meridian.pdf
It seems like the closest to what i am trying to do is James Robertson's method (p.75-76). I am struggling a bit with converting the figure to my visualization of the flat plane and the celestial sphere, but it seems to offer a method that will work even if the altitude is taken more than an hour from local noon, and without an estimated position. For the others, the observer needs to be within an hour, or have a 'latitude by account', neither of which I would like to have to depend on.
