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    Re: Biruni and the radius of the Earth by dip
    From: Marcel Tschudin
    Date: 2011 Jan 5, 17:56 +0200

    On Wed, Jan 5, 2011 at 5:27 PM, Apache Runner wrote:
    > Where did you get 6 moa from?
    
    Refr = ATN(S'/(r/k)
    with
    S': Distance to the refracted horizon
    r: Radius of earth
    
    There was an other interesting Web-page on this subject in German.
    Unfortunately it can now only be reftrieved from the cache:
    
    http://webcache.googleusercontent.com/search?q=cache:PJS0LNSWJcMJ:www.praxelius.de/astro/erdkruem.htm+praxelius+refraktion&cd=2&hl=de&ct=clnk&client=firefox-a
    Just in case it is of interest to you, I saved before the complete
    Web-page on my computer.
    
    Marcel
    
    
    
    

       
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