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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: dip, dip short, distance off with buildings, etc.
From: Dan Allen
Date: 2006 Jan 5, 19:59 -0700
From: Dan Allen
Date: 2006 Jan 5, 19:59 -0700
On 5 Jan 2006, at 6:44 PM, Frank Reed wrote: > This works perfectly to derive the equations in Bowditch for dip, > dip short, > Table XV, and apparently everything else where terrestrial > refraction is > involved. Details upon request... I too would like to see your derivation and thinking explained a bit more. Are you saying that this approximation is sufficient to reproduce the tables, or are you saying that this is exactly equivalent to the tables? What about all of the layers of the atmosphere and Snell's law? Can Euclidian geometry and a simple linear factor really be sufficient? Dan
