Trimble Outdoors r7 Manuale Utente
Trimble R7/R8 GPS Receiver User Guide 1 7 5
NMEA-0183 Output A
Tr
imble R7 and
R8
GGA
Time, Position, and Fix Related Data
An example of the GGA message string is shown below. Table A.3
describes the message fields.
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
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
2
Latitude
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