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    Re: The Darn Old Cocked Hat - the sequel 1
    From: Hanno Ix
    Date: 2013 Mar 12, 23:48 -0700

    that coincidence did not occur by accident - it was insight, right? :) happy


    From: Gary LaPook <garylapook---.net>
    To: hannoix---.net
    Sent: Tuesday, March 12, 2013 9:43 PM
    Subject: [NavList] Re: The Darn Old Cocked Hat - the sequel 1

    Interesting coincidence. Thirty years ago when I programed a calculator to do celestial nav in flight, I approximated the fix by moving 2/3rds (.66) the distance from one corner towards the third LOP, about the same point you chose.


    --- On Tue, 3/12/13, Hanno Ix <hannoix---net> wrote:

    From: Hanno Ix <hannoix---net>
    Subject: [NavList] Re: The Darn Old Cocked Hat - the sequel 1
    To: garylapook---net
    Date: Tuesday, March 12, 2013, 1:14 PM

                   "Sorry,  I can speak correctly or  understandably - not both" .


    This is a big peace of work that you sent, and I am seriously oblidged!

    In responding, let me pick just a couple of issues.
    To get started, please answer the 2 questions I posed re: CelNav cruise on the
    US carrier "Barak Obama"  in San Diego waters, will you? :) happy

    Next, please read the attached part 2 of my memo  "The Darn Old..."
    I hope it will show my goals of these 2 memos.

    Further, more questions that might be helpful to clear up things:

    You are trying to find a zero, say a zero of a standard parable, and will use Newton's
    iteration method, well, just because ... 

    My questions are:

      * Will it always converge, if it does, to the same point no matter your personal approximate choice at the start?
      * Does the distribution of the step errors close to the zero depend on this choice of yours?
      * Are we in a comparable situation when using St. Hilaire?
       * What is the difference to using an algebraic solution that does not start with a guess??
       * What is the difference to ignoring the LOPs and their error distributions and using only the corner points?.

    Would you please consider them?

    As you can see, I seem to be missing something in your argument.

    Best Regards, John



    1.    http://fer3.com/arc/imgx/f1-Cocked-Hat-V2.pdf;  is not available on the navlist.
    2.   I cannot locate any paper by Goudsmith or even their titles.

    Attached File: 122810.celnav error part2.pdf (no preview available)
    View and reply to this message: http://fer3.com/arc/m2.aspx?i=122810
    View and reply to this message: http://fer3.com/arc/m2.aspx?i=122825

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