NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Astronomy and Celestial Navigation [Really, GPS]
From: Richard B. Langley
Date: 2006 Jun 7, 10:19 -0300
From: Richard B. Langley
Date: 2006 Jun 7, 10:19 -0300
Correct. And wide-area DGPS systems such as WAAS, EGNOS, MSAS, CDGPS, and
various commercial systems cover huge areas both continental and oceanic.
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Tue, 6 Jun 2006, Peter MacNeil wrote:
> Richard,
> Even with this "distortion" be wouldn't it be corrected
>for by Differential stations (DGPS)? So the only areas it
>would theoretically affect areas those without DGPS
>coverage - areas outside North America and major european
>nations?
> Pete
>
>> Richard wrote...
>> And that would accomplish the goal, which is to allow
>> domestic use of the system while simultaneously severely
>> degrading it overseas. If you can keep the system
>> "substantially" functional over the domestic US, while
>> degrading it for a 5,000 mile footprint or even a 10,000
>> miles footprint someplace else--that's much better than
>> degrading it everywhere.
>
>
>
>
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Richard B. Langley E-mail: lang@unb.ca
Geodetic Research Laboratory Web: http://www.unb.ca/GGE/
Dept. of Geodesy and Geomatics Engineering Phone: +1 506 453-5142
University of New Brunswick Fax: +1 506 453-4943
Fredericton, N.B., Canada E3B 5A3
Fredericton? Where's that? See: http://www.city.fredericton.nb.ca/
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