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    Re: Curve fitting for noon Sun
    From: Hewitt Schlereth
    Date: 2020 Jan 13, 16:38 -0800

    Rafael, welcome aboard.

    You can also determine the time of noon by "bracketing" sights.

    As you follow the sun up, make a note of the time and altitude of one or two of your pre-max sights.

    After you have made a note of the sun's maximum  altitude, reset your sextant to a pre-max altitude and wait till the sun again touches that altitude.  Note the time.

    Add the time of the pre-max altitude to the time of its matching post-max altitude.  Divide by 2. That's the time of noon, which converts to your longitude.

    In 1982 I did a book on this subject - Latitude & Longitude by the Noon Sight.

    Regards and, again, Welcome Aboard, Rafael.

    Hewitt Schlereth

       
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