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    Re: The Darn Old Cocked Hat - the sequel 1
    From: Hanno Ix
    Date: 2013 Mar 13, 09:47 -0700

    I don't understand - that terminology is  foreign to me.
    Is there a description of both and of  their difference?
    Do you have, or can make up, cases for one and/or the other?

    All I wanted is a histogram of the absolute distance , prob(|d|) = f(|d|) or,
    in other words, the PDF of that *absolute distance* of the fix - not the fix's 
    coordinates; again: azimuth does not matter. 

    I made up that SAN Diego convention scenario which I hope got a little of your attention.
    It poses two simple questions created to illuminate . my quest. 

    Thank you, and regards!


    From: Andrés Ruiz <navigationalalgorithms---.com>
    To: hannoix---.net
    Sent: Wednesday, March 13, 2013 4:57 AM
    Subject: [NavList] Re: The Darn Old Cocked Hat - the sequel 1

    Hanno and Karl,

    IMHO both are right. Two sides of the same coin.
    1. One is a simulation based in a model without navigational data, 
    2. and the other is a probabilistic treatment of the navigational problem.
    Like in FEM, the model must be validate against real observed data.

    For the second way, the confidence ellipse is obtained using the covariance matrix of the system of equations.

    Andrés Ruiz
    Navigational Algorithms
    View and reply to this message: http://fer3.com/arc/m2.aspx?i=122832

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