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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Longhand Sight Reduction
From: Greg Rudzinski
Date: 2014 Nov 10, 11:17 -0800
From: Greg Rudzinski
Date: 2014 Nov 10, 11:17 -0800
Hanno,
The 10' haversine table has 2mm high numbers vs. 1.5mm on the 2' table set at 100% zoom. I can read 125% zoom on the 2' table OK.
For thoughs wishing to work the haversine Doniol reduction example by calculator:
Haversine = (1-cos x)/2 x = L+d, L-d, LHA or Meridian Angle
Arc Haversine = Arc Cos (1-2(column B sum)) = ZD zenith distance
= Arc Sin (1-2(column B sum)) = Hc calculated altitude
Greg Rudzinski
