NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Latitude by Lunar Distance
From: Frank Reed CT
Date: 2006 Nov 12, 19:22 EST
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From: Frank Reed CT
Date: 2006 Nov 12, 19:22 EST
George, you wrote:
"That assumption, of "no underlying bias", is a big one, and an
unjustified one. You can halve the error by taking four observations,
but only when those observations are all statistically independent."
unjustified one. You can halve the error by taking four observations,
but only when those observations are all statistically independent."
It is no "assumption", George. It works in practice, again and again. Or I
should say, it works 'for me' again and again, and that's why I recommend
it. Also, in the log books of vessels from the early 19th century, you
frequently find references to averaging four or more observations. This was
standard historical practice.
-FER
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
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