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    Re: Using star-star distances
    From: Bill B
    Date: 2008 Sep 23, 20:14 -0400

    George wrote
    > That's interesting, and rather a surprise to find such extreme
    > bad-behaviour. Was the index error similarly unstable, or did the index
    > error stay put while the calibration changed? What were the conditions of
    > the test? Had the instrument been given any time to stabilise, in
    > temperature? Presumably, the instrument had been checked-over to ensure that
    > no mirrors or brackets were at all wobbly
    If you have not checked out David Burch's field tests of plastic sextants,
    Frank's figures might seem a bit high, but they are pretty much in line with
    Burch's findings.
    Bill B.
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