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    Lunars accuracy
    From: Alexandre Eremenko
    Date: 2007 Oct 26, 11:14 -0700

    To those list members who are interested in the practical accuracy
    of the Lunar Distance Method:
    
    I just posted comparison graphs of the error distribution
    in the two publications of 1889 (Bolte and White) as well
    as my own data.
    http://www.math.purdue.edu/~eremenko/accuracy.html
    So we have hard data for the discussion of the accuracy
    of the Lunar method represented in a clear way, I believe.
    
    Some preliminary conclusions from these data are:
    a) the method is less accurate at sea BY A FACTOR OF 3.
    (Bolte is not the only source, he sites one other research on land
    and one at sea, and they also confirm this conclusion).
    b) even on land, even with averaging, you cannot achieve 0'2
    accuracy RELIABLY. It is true that MOST observations are within
    this limit, but the outlays of about 0'5 seem unavoidable,
    even in the averages of series.
    
    Alex.
    
    
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