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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Side error etc (Re: Beginner)
From: Frank Reed CT
Date: 2005 Oct 6, 18:50 EDT
From: Frank Reed CT
Date: 2005 Oct 6, 18:50 EDT
Bill wrote: "I suspect side error introduced by adjusting for IE would not account a 5' error. The problem being I have no idea how to quantify side or index-mirror perpendicularity errors. My texts explain how to adjust those errors out, and check for side error with a star or horizon, but little more." The mathematical details are discussed in Chauvenet's "Manual of Spherical and Practical Astronomy". This important two-volume treatise is now available online at http://www.hti.umich.edu/m/moa/ (many other important titles here, too). If you don't like the math yourself, I'm sure one of the mathier list members would be happy to quantify the errors that result from lack of mirror perpendicularity etc. -FER 42.0N 87.7W, or 41.4N 72.1W. www.HistoricalAtlas.com/lunars
