User Manual
Table Of Contents
- Trimble R6, R7 GPS Receivers / Trimble R8 GNSS Receiver User Guide
- Legal notices
- Safety Information
- Contents
- Introduction
- Trimble R7 GPS Receiver
- Overview
- Setting up the Receiver
- General Operation
- Configuration
- Transferring Data
- Software Utilities
- Specifications
- Default Settings
- Cables and Connectors
- Event Marker Input and 1PPS Output
- Trimble R6 GPS R8 GNS Receivers
- Overview
- Setting up the Receiver
- General Operation
- Configuration
- Software Utilities
- Specifications
- Default Settings
- Cables and Connectors
- Appendixes: Trimble R6/R7 GPS Receivers Trimble R8 GNSS Receiver
- NMEA-0183 Output
- RTCM Output
- Troubleshooting
- Index
Trimble R6/R7 GPS and Trimble R8 GNSS Receivers User Guide 131
NMEA-0183 Output A
Trimble R6 and R7 GPS/R8 GNSS Receiver Operation
HDT Heading from True North
The HDT string is shown below, and Tab le A. 6 describes the message fields.
$GPHDT,123.456,T*00
PTNL,GGK
Time, Position, Position Type, DOP
An example of the PTNL,GGK message string is shown below. Table A.7 describes the
message fields.
$PTNL,GGK,172814.00,071296,
3723.46587704,N,12202.26957864,W,
3,06,1.7,EHT-6.777,M*48
Note – The PTNL,GGK message is longer than the NMEA-0183 standard of 80 characters.
Table A.6 Heading from true north fields
Field Meaning
1 Heading in degrees
2 T: Indicates heading relative to True North
Table A.7 PTNL,GGK message fields
Field Meaning
1 UTC of position fix
2Date
3Latitude
4 Direction of latitude:
5 Longitude
6 Direction of Longitude:
7 GPS Quality indicator:
Differential, code phase only solution (DGPS)
8 Number of satellites in fix
9DOP of fix
10 Ellipsoidal height of fix
11
M: ellipsoidal height is measured in meters