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    Re: Finding great circle apex?
    From: Sean C
    Date: 2023 Dec 27, 20:32 -0800

    According to my notes:

    Vertex of the Great Circle Route

    cos(Latv) = cos(Lat1) ∙ sin(C)

    sin(dLon) = cos(C) / sin(Latv)

    -or-

    cos(dLon) = tan(Lat1) ∙ cot(Latv)

    Cheers!

    Sean C.

       
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