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    Re: S-table and long term almanacs
    From: Stan K
    Date: 2014 Oct 3, 16:02 -0400
    Carl,

    Mike Pepperday's S-table was never in Bowditch and was only in the Nautical Almanac (Yachtsman's edition, now called the Commercial Edition) from 1991 through, I believe, 1993.  Subsequently they came out in book form, still available from Celestaire for $9.95.  A while back Mike provided me with the one and only copy of a single large folded sheet version of the S-table.  I was going to look into having it reproduced, but it has been on the back burner for so long that it fell off the back of the stove.  I suspect it will prohibitively expensive, but I will check at the next opportunity.

    FWIW, a tool for cecking your S-table work (both Pepperday's original and Rodger Farley's Teacup Celestial modification) is included in Celestial Tools, along with several other sight reduction methods.

    Stan


    -----Original Message-----
    From: Carl Roberts <NoReply_Roberts@fer3.com>
    To: slk1000 <slk1000---.com>
    Sent: Fri, Oct 3, 2014 1:06 pm
    Subject: [NavList] S-table and long term almanacs

    alright guys, the months are passing. Where are the S-tables? what years wewe they in bowdith, or NA?
    maybe dr Kolb could boot the NA reduction and include Alan Bayless or S-Table. His Sun Almanac follows the Bowdith format. The HO 249/ "Seelf contained celestial navigation with HO 208" by John Letcher, Jr. have a slightly different method for long term almanac construction. They use a "correction" term to an almanac you have to get data from one you want. this uses any nonlinearity in your copy to compensate for that in the desired one.    b=0: EQN(0)=20.3066 b=1: EQN(0)=20.548 b=2:EQN(0)=20.8001 b=3: EQN(0)=21.048  the correction is the difference between the year you want and the almanac. See HO249 pdf on  Celestaire. I have LSREG out to 2100 using the data from the ipod NA                           
    (yr-2000)/4= dividend "a" and a positive rem"b"  EQN=EQN(0)-"a"x0.0306 (days)
       
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