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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).

Who Carries the Gold Standard Now?



 
 
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  #1  
Old January 29th 14, 07:01 PM posted to sci.geo.satellite-nav
Sam Wormley[_2_]
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Posts: 775
Default Who Carries the Gold Standard Now?

Who Carries the Gold Standard Now?
http://gpsworld.com/who-carries-the-gold-standard-now/


China’s BeiDou system claimed a user range error (URE) of 2.5 meters
zero age of data (ZAOD) 95% recently. The parallel GPS
specifications commit to 6 meters 95% ZAOD and 7.8 meters 95% all
AODs. Does this mean that BeiDou is more accurate than GPS? Not so
fast.


  #2  
Old January 29th 14, 10:42 PM posted to sci.geo.satellite-nav
Alan Browne
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Posts: 1,339
Default Who Carries the Gold Standard Now?

On 2014.01.29, 14:01 , Sam Wormley wrote:
Who Carries the Gold Standard Now?
http://gpsworld.com/who-carries-the-gold-standard-now/


China’s BeiDou system claimed a user range error (URE) of 2.5 meters
zero age of data (ZAOD) 95% recently. The parallel GPS
specifications commit to 6 meters 95% ZAOD and 7.8 meters 95% all
AODs. Does this mean that BeiDou is more accurate than GPS? Not so
fast.


I'm sure they can setup a test for any system and cherry pick the result
they want to publish. Just as anyone can.

The table in the article says it best. There's trade space (as well as
many unknowns for Beidou.
http://oregonarc.com/blog/wp-content...BDS-Chart1.png

Until the Chinese put up a worldwide service that shows its chops over a
long period it really can't compare to GPS+SBAS - or even GLONASS or the
yet to flesh out Galileo.

The author of the article says it best in the last para:
- Overall GNSS Things are getting better all the time.

As users we will care less and less about who makes the signal and more
about how our equipments uses the many signals made available to us and
we'll use them mixed.

--
“Everybody has a plan until they get punched in the face.”
- Mike Tyson

 




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