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    Re: Calculating accurate apparent-angles between stars
    From: Fred Hebard
    Date: 2003 Jan 6, 16:09 -0500

    Thank you George, for once again providing a lucid exposition of a
    problem in celestial navigation.
    The fact that one is doing the inverse of the usual clearing
    procedure had been coming in and out of focus for me, and currently
    was out.  Borda's and Young's procedures for clearing are the reverse
    of the procedure you outlined, as you pointed out without explicit
    reference to them.
    I also had the ulterior motive of trying to figure out what was going
    on with Bruce Stark's tables, which question has been raised more
    than once on this list.  I also would like to thank Bruce for
    outlining the basis of his procedure for clearing.  In comparing
    Bruce's method to your implementation of Young's procedure, one
    interesting point is that Bruce does not correct for latitude when
    adjusting horizontal parallax for the altitude of the body.
    Another interesting point, which I mentioned earlier, is that Bruce's
    tables apparently could be adapted to standard sight reduction, with
    no need to interpolate and only one volume to examine.  I have no
    idea how accurate that might be in extreme cases.
    Frederick V. Hebard, PhD                      Email: mailto:Fred@acf.org
    Staff Pathologist, Meadowview Research Farms  Web: http://www.acf.org
    American Chestnut Foundation                  Phone: (276) 944-4631
    14005 Glenbrook Ave.                          Fax: (276) 944-0934
    Meadowview, VA 24361

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