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Subject: Re: Is this quite the thing or not?
From: Rodney Myrvaagnes (rodneym@XXX.XXX)
Date: Tue Nov 05 2002 - 15:29:44 EST
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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