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    Re: Artificial horizon
    From: Alexandre Eremenko
    Date: 2005 Feb 20, 14:38 -0500

    Fred,
    Do you know the accuracy of the Cassens-Plath
    art horizon?
    I think 0.5' of the Friberger is too crude.
    (They should really make something better for $900:-)
    Last weekend I could consistently obtain Sun altitudes
    with less than 0.2' error in every single measurement,
    and less than 0.1' in the average of a series of 3,
    with a Davis art horizon filled with vegetable oil.
    (The results for the Moon altitude were much worse).
    Alex.
    
    
    

       
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