NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Hundreds of millions of GPS receivers
From: Jeremy C
Date: 2009 Dec 18, 09:50 EST
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From: Jeremy C
Date: 2009 Dec 18, 09:50 EST
I can't agree with this Bruce. GPS isn't any more a single source
than a celestial fix or a visual fix. GPS takes data from multiple birds
and determines position from a minimum of two, but usually four or more
signals.
As far as comparison, I'm interested in what kind of difference you are
willing to accept between celestial and GPS position? Is a mile good
enough, two, five? I just wonder what your standard is.
Jeremy
In a message dated 12/18/2009 1:25:45 A.M. Eastern Standard Time,
brucerhamilton@gmail.com writes:
I even think that a GPS has become an important part of celestial navigation. I call it my AP indicator. :-)
Since GPS is a single source, I don't take it's data as true until I confirm it through something trustworthy like a celestial shot. I'm not sure if this GPS technology is always working, but the moon and stars are pretty reliable.
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