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Re: Position from crossing two circles : was [NAV-L] Reality check

From: Andres Ruiz (no email)
Date: Thu Jun 08 2006 - 05:47:32 EDT

  • Next message: Herbert Prinz: "Re: Position from crossing two circles : was [NAV-L] Reality check"

    Yes, that's right
    thanks

    -----Mensaje original-----
    De: Navigation Mailing List [mailto:]
    En nombre de Herbert Prinz
    Enviado el: jueves, 08 de junio de 2006 11:25
    Para:
    Asunto: Re: [NAV-L] Position from crossing two circles : was [NAV-L]
    Reality check

    Hello Andres,

    There is a bracket missing. It should be:

    S ( [Sin Ho - [sin Dec sin Lat + cos Dec cos Lat cos(GHA+Lon) ] ]^2 )

    Herbert Prinz

    Andres Ruiz wrote:

    > *2. Position from n circles of equal altitude*
    >
    > Here the problem is there are a lot of crossings between the circles.
    > Metcalf & Metcalf, (On the overdetermined celestial fix - Refer to the
    > Bibliography section at the link below), developed a method based on
    > Lagrange Least-Squares minimization of the equation:
    >
    > S ( Sin Ho - [ sin Dec sin Lat + cos Dec cos Lat cos(GHA+Lon) ]^2 )
    >


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