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    Re: Haversines with Logarithms
    From: Greg Rudzinski
    Date: 2020 Oct 12, 07:28 -0700

    Matthew,

    I have just done a sample haversine Doniol sight reduction using the 5 place tables to then compare to a smart phone app as a check.  Latitude 27° 42 N Declination 27° 22 S and LHA 0° 31'.  The haversine Doniol Hc worked out to 34° 55.8' and the smart phone app worked out to 34° 55.9'.  So don't beat yourself up with all those extra places.

    Haversine Doniol wasn't developed for the Sumner time sight LOP . For the Sumner line I would use the Ageton Classic tables and the time sight formula. There is a 5 place natural sin cos and 6 place log custom table in PDF somewhere in the archive for reductions to the tenth of a minute. As I recall the tables came to less than 8 pages front and back.

    Greg Rudzinski 

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    f1-Ageton-Classic-1-.pdf
       
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