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    Re: Mathematical Advancement of a celestial COP
    From: Bill Murdoch
    Date: 1998 Oct 25, 3:33 PM

    I would take a look at four different references.
    
    M.F. A'Hearn and G.S. Rossano, "Two Body Fixes by Calculator", Navigation:
    Journal of the Institute of Navigation, Vol 24, No. 1, Spring 1977, p 59-66.
    This is a good easy conversion from two sights to a lat/long fix.
    
    J.A. Van Allen, "An Analytical Solution fo rthe Two Star Sight Problem of
    Celestial Navigation", Navigation: Journal of the Institute of Navigation, vol
    28, No 1 Spring 1981, p 40-43.  Much like the paper above, but a little
    different.
    
    B.D. Yallop and C.Y. Hohenkerk, "Compact Data for Navigation and Astronomy for
    the years 1991-1995" (and I think there is a newer edition), Cambridge
    University Press, p x-xxiv.  This is the real explaination for the almost un-
    understandable instrucitions in the Nautical Almanac.  It handles three or
    more sights, calculates the lat/long fix inside the cocked hat by a least
    squares method, and estimates the errors in the fix.  It is the method I used
    in my TI-82 program.
    
    George H. Kaplin, "Determining the Position and Motion of a Vessel from
    Celestial Observations", Navigation:Journal of the Insititute of Navigation,
    Vol 42, No 4, Winter 1995, p 631-648.  This is the state of the art.  Blow
    away.  Knowing everything you know; knowing where you are and where you are
    going.
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