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    Re: Averaging
    From: Bill B
    Date: 2004 Oct 21, 00:05 -0500

    Thank you Fred,
    What do you consider to be the upper limit of systematic shift due to
    averaging that is acceptable, or is that situational?
    > On Oct 20, 2004, at 7:09 PM, Bill wrote:
    >> My question, is there a rule of thumb that might indicate when
    >> averages are
    >> acceptable and when not.  For example, for error of .4' or less (due
    >> totally to systematic errors from averaging) difference between
    >> latitude and
    >> declination, plus altitude should exceed 60d (or any other number that
    >> the
    >> gurus decide is reasonable?
    > Bill,
    > I'm no guru, let me assure you, but as best as I can tell, as long as
    > you're 10 minutes away from meridian passage, averages or a straight
    > line are fine, regardless of declination and latitude.  This is for
    > short periods, such as 5 minutes.
    > Fred

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