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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). |
| Tags: fix, number, pggga |
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#1
June 17th 08, 07:29 PM
posted to sci.geo.satellite-nav
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PGGGA fix number
Anybody care to explain:
I received a nmea gga file from a NavCom gps receiver, which I was told it does DGPS. the gga file has a fix of 2 (DGPS fix) this is the gga i was given from the NavCom receiver: $GPGGA,112327.00,3937.709973,N,09335.054339,W, 2,09,1.1,82.621,M,-27.979,M,10.0,0130*7E but when i view the raw file (.dat coverted to .gpb) in GRAFNAV software and export to gga file, i get a fix of 0 (Invalid) $GPGGA,112227.00,3937.7099625,N,09335.0543172,W,0, 10,,54.613,M,,,,*21 Does anybody knows why I GRAFNAV exported out a fix of 0? and why it did not display the geoid diff either.? I am new at this so i was wandering if an expert would explain this to me 
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