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    Re: Lunar-distance almanac errors [was; The Online Nautical Almanac- beware!]
    From: Frank Reed CT
    Date: 2004 Jul 13, 17:34 EDT
    George H wrote:
    "What they have left us is more often just a deduced
    longitude. That deduced longitude is affected by

    1. any errors in their measurements.
    2. any errors in their data reduction process.
    3. any errors in the nautical almanac tables.

    We can not do much about the first two, but if we know those errors in the
    tables, it would allow us to adjust out their effect on the deduced
    positions by a corresponding amount, without knowing any details of how the
    longitude was arrived at."

    Aha. Yes, I can see some value to that. Thanks!

    Frank R
    [ ] Mystic, Connecticut
    [X] Chicago, Illinois
       
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