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    Re: Index error check Question
    From: Bill Murdoch
    Date: 1998 Dec 12, 16:47 EST

    In a message dated 12/12/98 2:01:27 PM EST, rick{at}XXX.XXX writes:
    << The question, then, is where is the extra 1.5' or 2.0' coming from and why
    does it vary from one instrument to the other? >>
    Are you perhaps watching the semidiameter of the sun changing ?  For instance
    on August 25 the Nautical Almanac lists the sun's semidiameter as 15.8' and
    today, December 12, it lists the semidiameter as 16.3'.  Were both
    observations taken on the same day ?
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