NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Frank Reed
Date: 2010 Apr 3, 09:42 -0700
Marcel, you wrote:
" What do you mean here Frank? Are you really doing more than just applying the "normal" refraction?"
No, it's just normal refraction. It has to do with the way the work is organized in the lunars clearing process. One mostly works with the positions of the centers of the Sun and the Moon. That means that the change in the Sun's or Moon's apparent shape has to be accounted for as a change in its semi-diameter at the beginning when that is added to (or in the case of a Far Limb sight, for the Moon's SD, subtracted from) the observed lunar distance.
-FER
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