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    Symmedian point -earliest reference in navigation
    From: Bill Lionheart
    Date: 2018 Oct 13, 13:54 +0100

    It is that time of year again  when I take my sextant in to the
    University and give a talk on the symmedian point in navigation, for
    prospective students.  I have been thinking more about the ellipses of
    equal probability and will let tell the list when I have something
    written up BUT for now I'd like to find the earliest (citable in an
    academic sense) reference to the use of the symmedian point in
    navigation.
    
    I have searched through the NavList archives, I followed most of the
    references in David Burch's helpful blog post
    http://davidburchnavigation.blogspot.com/2016/07/most-likely-position-from-3-lops.html,
    and I have searched the Journal of Navigation (and Google Scholar
    etc).
    
    I just want to give the right attribution for the observation that the
    the least squares point, hence the most probable position, can be
    located using a geometrical construction, rather than just matrix
    algebra.
    
    Thanks Bill Lionheart
    

       
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