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C NMEA-0183 Messages
84 AgGPS 332 GPS Receiver User Guide
C.4 GGA (GPS Fix Data)
The GGA message contains the time, position, and fix related data.
The GGA message structure is:
$GPGGA,151924,3723.454444,N,12202.269777,
W,2,09,1.9,–17.49,M,–25.67,M,1,0000*57
Table C.4 describes these fields.
Table C.4 GGA message fields
Field Description
1 UTC of position fix in HHMMSS.SS format
2 Latitude in DD MM,MMMM format (0-7 decimal places)
3 Direction of latitude
N: North
S: South
4 Longitude in DDD MM,MMMM format (0-7 decimal places)
5 Direction of longitude
E: East
W: West
6
GPS Quality indicator
0: fix not valid
1: GPS fix
2: DGPS fix
7 Number of SVs in use, 00-12
8 HDOP
9 Antenna height, MSL reference
10 “M” indicates that the altitude is in meters
11 Geoidal separation
12 “M” indicates that the geoidal separation is in meters
13 Age of differential GPS data record, Type 1; Null when DGPS not used
14 Base station ID, 0000-1023