User Manual

Trimble R6/R7 GPS and Trimble R8 GNSS Receivers User Guide 135
NMEA-0183 Output A
Trimble R6 and R7 GPS/R8 GNSS Receiver Operation
RMC Position, Velocity, and Time
The RMC string is shown below, and Tabl e A.13 describes the message fields.
$GPRMC,123519,A,4807.038,N,01131.000,E,022.4,084.4,230394,003.1,W*6A
ROT Rate of Turn
The ROT string is shown below, and Ta bl e A .1 4 describes the message fields.
$GPROT,35.6,A*4E
9 Quality indicator:
10 Number of satellites used in solution
11 PDOP
Table A.13 GPRMC message fields
Field Meaning
1 UTC of position fix
2
Status A=active or V=void
3
Latitude
4
Longitude
5
Speed over the ground in knots
6
Track angle in degrees (True)
7
Date
8
Magnetic variation
9
The checksum data, always begins with *
Table A.14 ROT message fields
Field Meaning
1 Rate of turn, degrees/minutes, "–" indicates bow turns to port
2
A: Valid data
V: Invalid data
Table A.12 PTNL,VHD message fields (continued)
Field Meaning