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    Re: LOP reductions and lunar clearance methods. A few comparisons usinglong hand and slide rules
    From: Greg Rudzinski
    Date: 2014 Jul 3, 09:39 -0700

    Francis,

    A technique to try on your next Doniol trial.

    Before making an observation:

    - select a DR assumed position

    - determine declination and plot azimuth through DR.

    - calculate azimuth by pocket slide rule using classic formula entered with rough Hs, LHA(t) and declination for time of DR (no need to be precise on this).

    - Sum Cos(L-d) + Cos(L+d)

    All that remains is observation LHA haversine product, cosine sum, and inverse sine for Hc to compare to Ho for intercept. Plotting is instant.

     

    Greg Rudzinski

       
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