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    Re: Emergency sun declination
    From: Ken Gebhart
    Date: 2004 May 20, 22:15 -0500

    on 5/20/04 8:39 PM, Fred Hebard at Fred{at}ACF.ORG wrote:
    
    > In the absence of a plotting sheet, one could draw in the points of the
    > compass rose, NE, NNE, etc, with a compass or dividers, although that
    > certainly couldn't give you a degree for every day.
    >
    > Fred
    >
    > On May 20, 2004, at 5:46 PM, Frank Reed wrote:
    >
    >> Doug R wrote:
    >> "It is a straight forward procedure.But you must have a rose or
    >> universal plotting sheet."
    >>
    >> That's the nice thing about this approach compared to the draw your
    >> own circle approach. As Ken mentioned, the tricky part is dividing up
    >> the points around the hand-drawn circle. A printed compass rose at
    >> least gives you a reliable starting point.
    >>
    >> And:
    >> "6.Multiply that ratio by 22.50*(degree)"
    >>
    >> That's a typo, I assume (it was in Jim's post, too). It should be
    >> 23.5 degrees.
    >>
    >> Frank R
    >> [ ] Mystic, Connecticut
    >> [X] Chicago, Illinois
    >
    Please allow me to wade back in here again.  Apparently the idea of drawing
    a circle or using a universal plotting sheet has received some amount of
    acceptance.  However, my original question related to: how much error do we
    get using this method versus plotting sine curves (however broad) or
    consulting Meeus.  Did I miss a posting, or are there any other ideas?
    
    Ken Gebhart
    
    
    

       
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