User's Manual

A NMEA-0183 Output
168 Trimble R7/R8 GPS Receiver User Guide
TrimbleR7/R8 GPS Receiver Operation
GGA Time, Position, and Fix Related Data
An example of the GGA message string is shown below. Table A.3
describes the message fields.
$GPGGA,172814.0,3723.46587704,N,12202.26957864,W,
2,6,1.2,18.893,M,-25.669,M,2.0,0031*4F
Table A.3 GGA message fields
Field Meaning
1 UTC of position fix
2Latitude
3 Direction of latitude:
N: North
S: South
4 Longitude
5 Direction of longitude:
E: East
W: West
6 GPS Quality indicator:
0: Fix not valid
1: GPS fix
2: Differential GPS fix
4: Real Time Kinematic, fixed integers
5: Real Time Kinematic, float integers
7 Number of SVs in use, range from 00 to 12
8 HDOP
9 Orthometric height (MSL reference)
10
M: unit of measure for height is meters
11 Geoid separation
12
M: geoid separation is measured in meters