SkyTraq PX1172R - NMEA GGA - Global Positioning System Fix Data; GGA Structure and Field Explanations

16
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TheformatsofthesupportedNMEAmessagesaredescribedasfollows:
GGA–GlobalPositioningSystemFixData
Time,positionandfixrelateddataforaGPSreceiver. 
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Structure:
$GPGGA,hhmmss.sss,ddmm.mmmmmmm,a,dddmm.mmmmmmm,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh<CR><LF>
123456789101112
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Example: 
$GPGGA,033010.000,2447.0895508,N,12100.5234656,E,4,12,0.7,94.615,M,19.600,M,,0000*66<CR><LF>
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Field Name Example Description
1 UTCTime 033010.000 UTCofpositioninhhmmss.sssformat,(000000.000~235959.999)
2 Latitude 2447.0895508 Latitudeinddmm.mmmmmmmformat
Leadingzerostransmitted
3 N/SIndicator N Latitudehemisphereindicator,‘N’=North,‘S’=South
4 Longitude 12100.5234656 Longitudeindddmm.mmmmmmmformat
Leadingzerostransmitted
5 E/WIndicator E Longitudehemisphereindicator,‘E’ =East,‘W’=West
6 GPSquality
indicator
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4 GPSqualityindicator
0:positionfixunavailable
1:validpositionfix,SPSmode 
2:validpositionfix,differentialGPSmode
3:GPSPPSMode,fixvalid
4:RealTimeKinematic.SystemusedinRTKmodewithfixedintegers
5:FloatRTK.SatellitesystemusedinRTKmode.,floatingintegers
6:Estimated(deadreckoning)Mode
7:ManualInputMode
8:SimulatorMode
7 SatellitesUsed 12 Numberofsatellitesinuse,(00~12)
8 HDOP 0.7 Horizontaldilutionofprecision,(0.0~99.9)
9 Altitude 94.615 meansealevel(geoid),(‐9999.9~17999.9)
10 GeoidalSeparation 19.600 Geoidalseparationinmeters
11 AgepfDifferential
GPSdata
AgeofDifferentialGPSdata
NULLwhenDGPSnotused
12 DGPSStationID 0000 DifferentialreferencestationID,0000~1023
13 Checksum 66
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