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    Re: Error ellipse proportions
    From: Andrés Ruiz
    Date: 2017 Jun 9, 11:07 +0200
    This algorithms is very robust and one of my favorites.

    Originally, the method was published in this paper:
    Optimal Estimation of a Multi-Star Fix, C. De Wit. NAVIGATION, Vol.21 , No. 4, Winter 1974-75, pp 320-325

    And adopted by the Nautical Almanac(USNO) and by HM Nautical Almanac Office (UK).
    Years ago I exchanged some emails with Kaplan and Hohenkerk about this issue.

    I describe it in detail in: "Celestial Fix - n LoPs NA Sight Reduction algorithm. Paper & Excel"
    available at https://sites.google.com/site/navigationalalgorithms/papersnavigation
    Also the mathematical basis under a matrix approach is explained.

    Fair winds and following seas.
    --
    Andrés Ruiz
    Navigational Algorithms
    http://sites.google.com/site/navigationalalgorithms/
       
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