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    Re: Longhand Sight Reduction
    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

       
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