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    Re: Anyone know about this?
    From: Fred Hebard
    Date: 2007 Nov 26, 17:24 -0500

    Hopefully, Paul Hirose will jump in here.  To my understanding,
    they've had these gadgets for a while now.
    
    
    On Nov 24, 2007, at 8:47 PM, Guy Schwartz wrote:
    
    > I was bopping around the USNO web site and ran across this:
    > Celestial Navigation
    >  A device that automatically observes stars, day or night, with
    > respect to the local gravity vector (i.e., the true "down"
    > direction), could provide a high-precision location and attitude
    > solution for ships and aircraft, independent of GPS. Two prototype
    > units with different designs have been constructed, one that
    > operates in the far-red optical part of the spectrum, the other in
    > the near-infrared. Accuracies better than 100 meters in position
    > and several arcseconds in attitude should eventually be achievable
    > with such devices. This project is jointly managed by the U.S.
    > Naval Observatory in Washington and the Navy's SPAWAR System Center
    > in San Diego. The prototype units were built by two California
    > contractors. A follow-up device is being built for surveying
    > applications (fixed points on land) by one of the contractors,
    > funded by the National Geospatial-Intelligence Agency (NGA). The
    > feasibility of using similar devices to precisely align Navy Aegis
    > ship radar is also being investigated.
    >
    > The navigation software for the project is based on some innovative
    > algorithms for celestial navigation developed at the Naval
    > Observatory about a decade ago. These algorithms are based on the
    > solution to a familiar astronomical problem - determining the orbit
    > of a body from a series of observations. In this case, the body in
    > question is a ship and its "orbit" is a rhumb-line track over the
    > spheroidal surface of the Earth.
    >
    > Anyone know anything about it or if it works:
    >
    > Guy
    >
    >
    > >
    > No virus found in this outgoing message.
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    > Version: 7.5.503 / Virus Database: 269.16.6/1150 - Release Date:
    > 11/24/2007 5:58 PM
    >
    >
    >
    
    
    
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