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    Re: USNO celestial navigation algorithms
    From: Gordon Talge
    Date: 2003 Jun 2, 18:34 -0700

    Paul Hirose wrote:
    > Seen on the U.S. Naval Observatory Web site:
    > "As part of a Navy software project, new algorithms for celestial
    > navigation have been developed. These algorithms are based on a
    > solution to a familiar astronomical problem - determining the orbit of
    > a body from a series of observations. In this case, the body in
    > question is a ship and its orbit is a rhumb-line track over the
    > spheroidal surface of the Earth. Given suitably accurate observing
    > systems, these algorithms would provide sight reduction and positional
    > fixes at the one arcsecond (30 meter) level of precision."
    > The algorithms were published in four papers by G.H. Kaplan, published
    > 1995 - 1996. Two are available online. Reprints of all may be ordered
    > from the USNO.
    > http://aa.usno.navy.mil/research/celnav.html
    > Several months ago I mentioned a whiz-bang celestial nav program
    > called STELLA, which unfortunately is in the military-only area of the
    > USNO site. I wonder if STELLA is based on the algorithms in these
    > papers.
    Yes it is.
    --- Gordon
                                 (. .)
    | Gordon Talge WB6YKK               e-mail: gtalge@pe.net    |
    | Department of Mathematics       http://www.lbusd.k12.ca.us |
    | Wilson High School                  Long Beach, CA         |
    | (o-    Debian / GNU / Linux                                |
    | //\    The Choice of the GNU Generation                    |
    | v_/_                  .oooO                                |
    |    - E Aho Laula -     (  )   Oooo. - Wider is Better -    |
    +-------------------------\ (---(  )-------------------------+
                               \_)  ) /

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