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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: "100 Problems in Celestial Navigation"
From: Renee Mattie
Date: 2004 Apr 4, 16:24 -0400
From: Renee Mattie
Date: 2004 Apr 4, 16:24 -0400
I want to thank everybody who chimed in on this thread about Leonard Gray's 100 problems, cocked hats, and sight reduction methods. I have found it edifying. I would be happy to compare my results to those obtained by others. I have a couple of questions: + Is there a copyright issue to posting the text of one or several of these problems? + What about sight averaging? I have read recommendations to plot the altitudes of three sights taken in rapid succession and use an altitude/time average, or to find a best-fit line of the proper slope. Here, folks seem to prefer to plot the LOPs from all three sights. I suppose this gives you some notion of the size of the error in the individual sights. I find it difficult, when examining the result, to decide where to mark an MPP, which is, I guess, the point. Leonard Gray does not give any notion of how close he feels the student should come to his answer. Renee