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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lunars question for Frank
From: Frank Reed CT
Date: 2005 Oct 6, 18:49 EDT
From: Frank Reed CT
Date: 2005 Oct 6, 18:49 EDT
Bill you asked: "Has the angular distance off in longitude been adjusted by the program for latitude, therefore should be translated directly into nautical miles by converting to decimal degrees and multiplying by 60, or should an adjustment be made for latitude when determining nautical miles off?" It's approximate error in longitude so multiply by cos(Lat) if you want nautical miles. Actually, the code is doing nothing more than multiplying your distance error by 30. One of these days I'll modify it to give a more accurate longitude error (which depends on the rate of change of the actual distance but is generally close to 30). -FER 42.0N 87.7W, or 41.4N 72.1W. www.HistoricalAtlas.com/lunars
