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