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    Re: Sextant accuracy with short distance to horizon
    From: Rodney Myrvaagnes
    Date: 2001 Jun 26, 7:48 AM

    On Mon, 25 Jun 2001 15:46:33 -0700, Dan Hogan wrote:
    
    >>
    >> That's interesting. But surely one must make an allowance for the fact
    >> that the fence is not at the same altitude as the horizon.
    >
    >I can't remember that much about the post, but I THINK he had some kind of HE
    >correction for his eye above the fence line.
    >
    He would need extremely accurate survey data if there was
    any meaning to be had. He would have to know the relative
    height of the fence and his eye, as well as the distance to
    the fence.
    
    
    If he already knew the exact location, and took sights
    over a long period of time, he could eventually derive the
    HE.
    
    
    
    
    
    Rodney Myrvaagnes                   J36 Gjoa     rodneym---global.net
    Senior Editor           Electronic Products
    
    "Fireman saves pregnant squirrel"  -- Arizona Republic, Dec. 14, 2000
    

       
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