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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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