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    Re: Zero-Altitude Shot
    From: Bob Goethe
    Date: 2019 Sep 4, 05:40 -0700

    I went ahead and plotted the data from my Pub. 249 reduction of the zero-altitude shot.  It is attached as Image3.  Given the ambiguity around the actual time of sunset, I am satisfied that the basic method works.

    So there is no problem with the use of Pub. 249...only with the Bygrave equations.

    Thanks again for thinking about this with me,

    Bob

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