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    Re: Confusion in NAO sight reduction tables...?
    From: George Huxtable
    Date: 2006 Sep 13, 14:55 -0500

    Thanks to Herbert Prinz for his perception on this matter.

    I had completely misunderstood; led astray, to some extent, by
    Geoffrey Kolbe, but I had it just as wrong as he did, so not his

    It's good that this list has sharp minds that can put us right when we
    get things wrong.


    contact George Huxtable at george@huxtable.u-net.com
    or at +44 1865 820222 (from UK, 01865 820222)
    or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.


    Geoffrey Kolbe wrote:

    >How would you answer this?
    >Suppose A = 74° 45'.  "Set A° = the nearest whole degree of A and A'
    >= the
    >minutes part of A."
    >Would you set A° to 74 or 75?

    A° is to be set to 75.

    The wording is correct and is the same in the N.A. for 2007. The same
    logic applies to F°.

    You see, the auxiliary interpolation table is folded at 30'; If A' >
    , the sign for the correction changes! (Same for F'; see steps 5 and

    Herbert Prinz

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