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    Re: Hav-Doniol Checker Beta2
    From: Andrés Ruiz
    Date: 2015 Jun 30, 08:37 +0200

    Please, see: http://fer3.com/arc/m2.aspx/Review-Longhand-Haversine-Sight-Reduction-method-Andr%C3%A9sRuiz-jun-2015-g31824

    In the attached spreadsheets examples I use the formula implicit in the Hanno Z diagram: 

    sin Z cos Hc = sin t cos Dec


    C = sin t * cos Dec
    Z = asin( C/ cos Hc )

    with:

    -180º <= t <= 180º (the diagram has values for t between 0 and 90º).

    If( |t| > 90º ) |t| = 180º-|t|

    0 <= Z <= 90º is E/W as the meridian angle is.


    regards

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