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    Re: Azimuth diagram of Hanno Ix
    From: Greg Rudzinski
    Date: 2020 Sep 28, 06:06 -0700

    I like using a pocket slide rule to determine the Hc of prime vertical. This allows for determining whether to use north or south as reference. Formula: PV (Hc) = arc sin} sin dec/sin lat.

    Greg Rudzinski

       
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