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sci.geo.satellite-nav (Global Satellite Navigation) (sci.geo.satellite-nav) Discussion of global navigation satellite systems (GNSS). Topics include the technical aspects of GNSS operation, user experiences in the use of GNSS, information regarding GNSS products and discussion of GNSS policy (such as GPS selective availability).

Get Back, Loretta: DARPA Seeks to Eliminate GPS Dependence



 
 
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  #1  
Old November 25th 13, 12:15 AM posted to sci.geo.satellite-nav
Sam Wormley[_2_]
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Posts: 775
Default Get Back, Loretta: DARPA Seeks to Eliminate GPS Dependence

Get Back, Loretta: DARPA Seeks to Eliminate GPS Dependence
http://gpsworld.com/get-back-loretta...ps-dependence/


Despite impressive micro-PNT work to date, current mechanisms remain
complex, bulky, power-hungry and pricey. They have limited
resolution and poor long-term stability. Alternative forms give
excellent resolution and bias stability, but are limited in bandwidth
and generally do not allow high-frequency measurements.

Make no mistake, however. Yankee (and whatever other forms that can
be brought to bear) ingenuity will, eventually, win the day. Where
then will GNSS find itself?


  #2  
Old November 25th 13, 09:15 PM posted to sci.geo.satellite-nav
Alan Browne
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Posts: 1,339
Default Get Back, Loretta: DARPA Seeks to Eliminate GPS Dependence

On 2013.11.24, 20:15 , Sam Wormley wrote:
Get Back, Loretta: DARPA Seeks to Eliminate GPS Dependence
http://gpsworld.com/get-back-loretta...ps-dependence/


Despite impressive micro-PNT work to date, current mechanisms remain
complex, bulky, power-hungry and pricey. They have limited
resolution and poor long-term stability. Alternative forms give
excellent resolution and bias stability, but are limited in bandwidth
and generally do not allow high-frequency measurements.

Make no mistake, however. Yankee (and whatever other forms that can
be brought to bear) ingenuity will, eventually, win the day. Where
then will GNSS find itself?


This came up about a year ago (more or less).

It's a good thing. Though I don't recall the 20 minute mission duration
goal - I assumed it was much shorter (a few minutes at most).

SATNAV is here to stay for the long term, despite the last sentence in
the article. It is dirt cheap on the subscriber end for the PVT service
accuracy and reliability provided. Though I could see the use of "micro
inertial" systems for small RPV's.

--
"The radio was once expected to promote international understanding and
co-operation;
it has turned out to be a means of insulating one nation from another."
-George Orwell, 1945

 




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