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    Re: Biruni and the radius of the Earth by dip
    From: Marcel Tschudin
    Date: 2011 Jan 5, 03:34 +0200

    On Wed, Jan 5, 2011 at 2:07 AM, Apache Runner wrote:
    > Someone can check my numbers.
    >
    A typical value for the "Kimmtiefe", i.e. for the (refracted) angle
    between astronomical and geodetical horizon is obtained with:
    "Kimmtiefe" in moa = 2.06 sqrt(H).  For an altitude of 500m thus 46
    moa. This formula is based on k=0.125. See also this page from Andy
    Young http://mintaka.sdsu.edu/GF/explain/atmos_refr/dip.html
    
    Marcel
    
    
    
    

       
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