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    Re: slide rule sight reduction accuracy
    From: Gary LaPook
    Date: 2009 Aug 14, 02:47 +0200

    Very nice! I don't have a copy of Geoffrey's long term almanac but since
    he developed it I am sure it is a good one. I will have to contact him
    to see how I can get a copy. I noticed that you added a rule for when Y
    < 54', a case I didn't think about on my form. I did notice one error,
    however. "If 1> H > 90 assume another lon" should be "If 1 > H > 89."
    Thank for the improved form.
    Hein Bodahl wrote:
    > On 19.06.2009 12:50, Gary LaPook wrote:
    >> Here is the form I had meant to send. This uses my notation of "W"
    >> instead of Bygrave's "y" on the previous form.
    >> gl
    > If it could be of use.
    > I have attached a compiled workform based on the one from Geoffrey
    > Kolbe's "Long Term Almanac" to calculate declination and LHA, and yours
    > to work out the Hc and Zn from the flat Bygrave.
    > I got it to fit on one page with some space to scribble. I have
    > laminated it and use a whiteboard pen to fill it in. Using matte
    > lamination you could probably use a soft pencil.
    > The colors match the colors I have added to the headers from the tables
    > I have scanned from the "Long Term Almanac" (not attached, get it
    > yourselves :-) ). The whole set including the Bygrave fit on 9 sheets.
    > (I have made sure it is ok with mr. Kolbe to post the workform as it is
    > partly copied from the "Long Term Almanac".)
    > Hein
    > >
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