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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Working a lunar
From: Hanno Ix
Date: 2009 Aug 6, 10:34 -0700
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From: Hanno Ix
Date: 2009 Aug 6, 10:34 -0700
George: Thank you for taking the time to think through this concept of mine - as of yet still half baked. Let me get to the core of the concept in form of a couple of questions: 1. Is it true that: on land, the culmination of a heavenly body, including the moon, can be established rather accurately in reference to altitude and in reference to time as indicated by a stable local clock? Neglect for now culminations near the horizon. Typcally, on land a transit is being used for this measurement. How well the observed culmination refers to the real local Noon or GMT is not at issue in this question. The "stable" clock need only proceed accurately from second to second, but may not indicate GMT or even the local time. 2. Is it true that: for any given time, there exists on the surface of the Earth a Geometric Locus of all those positions that have the same time difference DT between the culminations of two heavenly bodies? (The Geometric Locus need not be contiguous over the surface of the Earth and will change with GMT. I assume it to be close to a straight line locally.) Affirmative ansers to these two questions form my basic assumptions. If they are not valid I will hold my peace. Best regards. H PS: Found your prior article and enjoyed it. --- On Thu, 8/6/09, George Huxtable <george@hux.me.uk> wrote:
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