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    Re: Measuring (and Calculating) Dip
    From: David Fleming
    Date: 2013 Mar 1, 07:36 -0800


    The following is the conclusion of Friesenleben's paper.

    10. CONCLUSION. These investigations into 'the dip of the horizon
    are offered as a considerable contribution toward the explanation of a
    much-debated scientific problem, and have proved for practical purposes
    that measurements of the temperature can only give approximate values
    for the dip of the horizon but will not yield correct results in individual

    Still I understand the enthusiasm for trying to make dip measureemnts with your instrument. Experience is always a better teacher than just reading.

    >When he says to take the temperature at the height of the eye, does that mean >at the location of the eye? Or can I substitute the buoy location because the >buoy's thermometer is roughly at the height of the eye?

    The ray path crosses much more water than land so the bouy temperature is ideal for your purposes. But the recognition that they might be different and variable along the path is a big hurdle to accurately predict horizon refraction.

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