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    Re: automatic celestial navigation
    From: Nicol�s de Hilster
    Date: 2008 Jan 10, 20:30 +0100

    frankreed{at}HistoricalAtlas.net wrote:
    > Now there's been no great advance in all these 
    > decades in artificial horizons. There's simply no way to get a vertical that 
    > is not influenced by the motion of the airplane. 
    There is one significant advance that was introduced some ten years ago: 
    the FOG (Fibre Optic Gyro). Combined with acceleration sensors these 
    produce very high quality motion reference units and even inertial 
    navigation systems. Initially developed for military rocket application 
    the downgraded versions of these instruments are widely used in 
    hydrography and other businesses.
    
    For examples/documentation you can check 
    http://www.ixsea.com/en/systems/002.005.001/hydrographic.html and the 
    space developments: 
    http://www.ixsea.com/en/systems/002.006/_products-space.html
    
    I am a regular user of these systems (and did several performance tests 
    with them as well for the Dutch government) and know from experience 
    that the direction of the vertical is not influenced by lateral 
    motions/accelerations.
    
    Nicol�s
    
    
    
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