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    Re: Raw data for bubble
    From: Bill B
    Date: 2007 Mar 22, 18:48 -0400

    Bill Noyce wrote:
    >> I think the intent is to observe until the predicted h occurs, and
    >> record the resulting GMT.  From that and the matching LHA you compute
    >> GHA and Longitude.  Right?  And you use the graphical method to
    >> interpolate to hit the desired h exactly.
    Bill responded:
    > You would have to ask Peter about that.  My impression is once he had the
    > time of transit, he computed Hc.  Any difference between Hc or Ho was
    > plotted east/west from AP for longitude.
    If understand Peter's method, I missed one part in my answer.  Peter wants
    the observation to be exactly at the pre-computed time.  That can be a
    problem in practice.  By starting before the exact time he derives two
    --He has points he can fit to a slope to find for the best estimate of Hs, H
    or Ho and identify outliers.
    --If he missed an observation at the exact moment, he can locate that moment
    on his time axis then the plot line of Hs, H or Hc.
    Bill B
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