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    Geocentric and topocentric GHA and Dec
    From: Andrés Ruiz
    Date: 2012 Jan 13, 12:15 +0100
    Dear frank,

    yesterday i have read your paper 20_AAS_11-669_Reed.pdf Thanks for make it available.

    I have a question: For a CoP, You says: "The topocentric Declination is equal to the observer’s latitude. The topocentric GHA is equal to the observer’s longitude"

    The equation of a CoP link position of the observer (lat, lon) with horizon coordinates (Ho, Zn) and equatorial coordinates - geocentric apparent (RA/GHA, Dec)

    I think you mean the difference is parallax correction for altitude, isn´t it?

    regards
    -- 
    Andrés Ruiz
    Navigational Algorithms
    http://sites.google.com/site/navigationalalgorithms/
       
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