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A NMEA-0183 Output
186 Trimble R7/R8 GPS Receiver User Guide
Trimble R7 and R8
VTG Actual Track Made Good Over and Speed Over Ground
An example of the VTG message string is shown below. Table A.15
describes the message fields.
$GPVTG,,T,,M,0.00,N,0.00,K*4E
Table A.15 VTG message fields
Field Meaning
1 Track made good (degrees true)
2 T: track made good is relative to true north
3 Track made good (degrees magnetic)
4 M: track made good is relative to magnetic north
5 Speed, in knots
6 N: speed is measured in knots
7 Speed over ground in kilometers/hour (kph)
8 K: speed over ground is measured in kph