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    Re: Is this quite the thing or not?
    From: Rodney Myrvaagnes
    Date: 2002 Nov 5, 15:29 -0500

    Furuno also has a GPS compass. They can certainly replace a
    gyrocompass.
    
    The carrier-phase computations get the bearing from one antenna to the
    other with much closer spacing of anntennae than would otherwise be
    needed.
    
    It is easy to see how a pair of cheap GPS receivers at opposite ends of
    a supertanker could be used to tell the heading.
    
    BTW, there is a lot more redundancy in the sattelite system than in two
    receivers. You can usually see more than twice as many satts as you
    need for a 3D fix.
    
    
    On Tue, 5 Nov 2002 11:30:02 -0800, Dan Allen wrote:
    
    >Simrad has a new product with two GPS receivers in one instrument for
    >added redundancy.  Of course if the GPS system goes down this
    >redundancy does nothing for you.
    >
    >Anyway, here is their simple description of the device: what does the
    >group think of it?  Are their claims justified?  Does anyone know what
    >it is doing -- the carrier phase data?  In the spirit of having
    >multiple ways of tracking your position (GPS, dead reckoning, celestial
    >nav), it may be a big step backwards as it claims to replace a
    >gyrocompass.  It is this aspect that I am particularly interested in.
    >
    
    
    Rodney Myrvaagnes                                      J36 Gjo/a
    
    
    "Never stand behind a sneezing cow."  Michael Perry
    
    
    

       
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