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    Re: accuracy of automatic celestial navigation
    From: Dan Allen
    Date: 2002 Dec 6, 21:41 -0800

    On Friday, December 6, 2002, at 01:32 PM, Paul Hirose wrote:
    > https://www.peterson.af.mil/GPS_Support/documents/
    > masternav_timing_plan.pdf
    > (a) Description. Using fully-developed space-tested astro-trackers,
    > the advanced celestial navigator (ACN) will provide day and night
    > celestial navigation in partially obscured skies. The highly sensitive
    > charged coupled devices, operating in the near infrared, will be able
    > to define angles to celestial bodies to within 1 arcsecond, a
    > sixty-fold improvement over the current hand-held visual system.
    > Celestial fixes to within 30 meters will be common. For aircraft,
    > altitudes to 100 feet are realizable.
    Neat stuff!  I wish we could see something commercial that would be a
    digital sextant.  Hey, Celestaire helped get the Astra IIIb made, and
    Celestaire is not too far from Garmin (both are in Kansas) -- perhaps
    Celestaire could work with and commission Garmin to do an ACN for the
    rest of us!

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