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    Re: An analytical solution of the two star sight problem of celestial navigation
    From: Bruce Cutting
    Date: 2019 Mar 5, 09:27 -0700

    The program OpenCPN (free) has a plug in that does this for an arbitrary
    number of observations.
    
    
    On Tue, March 5, 2019 07:01, Bill Lionheart wrote:
    > And the idea is quite simple. The circles of position from each sight
    > is the intersection of a plane with the sphere. The planes intersect in a
    > line, and it is easy to find the intersection points of a line with a
    > sphere. I dont know who was teh first to do this.  For bonus points what
    > is the probability contour in this case! (I don't know off hand)
    >
    > Bill
    >
    >
    > On Mon, 4 Mar 2019 at 15:03, Andrés Ruiz 
    > wrote:
    >
    >>
    >> As a curiosity the paper by James Van Allen: "An analytical solution of
    >> the two star sight problem of celestial navigation" February 1981 at
    >> https://apps.dtic.mil/dtic/tr/fulltext/u2/a098626.pdf
    >>
    >>
    >> Published: IoN Vol. 28, No. 1, Spring 1981
    >>
    >>
    >> regards. --
    >> Andrés Ruiz
    >> Navigational Algorithms
    >> http://sites.google.com/site/navigationalalgorithms/
    >>
    >>
    >> View and reply to this message
    >>
    >
    > View and reply to this message:
    > http://fer3.com/arc/m2.aspx/An-analytical-solution-two-star-sight-problem-
    > celestial-Lionheart-mar-2019-g44483
    
    
    

       
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