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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | RE: [gislist] GPS and Selective Availability |
| Date: |
01/30/2005 07:50:00 PM |
| From: |
Sonny Parafina |
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Before posing such a question, please take five seconds and use google.
Doing so, you would have found that SA has been off since May 2000. Please
see the following:
http://www.ngs.noaa.gov/FGCS/info/sans_SA/
sonny
-----Original Message-----
From: gislist-bounces@lists.thinkburst.com
[mailto:gislist-bounces@lists.thinkburst.com]On Behalf Of smita tajne
Sent: Friday, January 28, 2005 6:07 PM
To: gislist@lists.thinkburst.com: gislist-bounces@lists.thinkburst.com
Subject: [gislist] GPS and Selective Availability
We know that GPS satellite network is owned by US Department of Defence and
the accuracy of the signal is intentionally degraded for non US military
users called Selective Availability. However, the accuracy can be greatly
enhanced (sometimes in sub-meter) by using DGPS. I always wonder why errors
are being introduced if they can be removed by using other techniques? Any
idea?
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