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    Re: Almanac Heaven
    From: Frank Reed CT
    Date: 2006 Mar 30, 02:45 EST

    Ken Gebhart wrote:
    "Also, Brown's Almanac  (Glascow), and Reed's Almanac, are claimed by the
    British Almanac Office to be  paying royalties too.  "
    And really, it is in their best interests  financially to do so. The
    astronomical and navigational data themselves cannot  be copyrighted. No one owns the
    position of Mars at 0h GMT on June 23, 2013. No  one owns the value of the
    atmospheric refraction at four degrees altitude. I can  easily publish today my
    own "Nautical Almanac" calculated from first principles  (and the standard JPL
    ephemeris data) and it would be functionally identical to  the official
    Nautical Almanac. But who would buy it (especially since I make  that data available
    for free on my web site)? Part of the reason that navigators  and navigation
    enthusiasts are willing to buy private almanacs today is because  of the
    implicit promise that there are no errors since they derive from the  "official"
    source. A re-publisher is spending money wisely to get data  sanctioned with a
    "seal of approval" from those official sources. It creates  instant
    credibility. And of course , there is no way that *they* could  publish any mistakes.
    By the way, didn't someone inform the list a while  back that Reed's Almanac
    (no relation, incidentally) no longer includes  celestial navigation tables?
    42.0N 87.7W, or 41.4N  72.1W.

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