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    Re: Lat/Lon by "Noon Sun"
    From: John Karl
    Date: 2009 Apr 14, 11:58 -0700

    I've been giving some recent thought to using the analemma in an
    introductory course, similar to the discussion in my little "Latitude
    & Longitude" book.
    
    In addition to George's problem of reading the analemma to a
    reasonable precision (maybe a minute or two of arc) is the problem of
    the plot being valid to that level of accuracy over some years.  (I
    assuming Frank's not thinking of an annually issued analemma.)  At
    least we would need four analemmas to cover the 4-year cycle of 365.25
    days/year.  Then we need to convert the plotted data to the actual
    current year of use, similar to what is done in my booklet.  Even
    using this scheme with numerical data, it's not easy to maintain 1' of
    accuracy.
    
    -- JK
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