Orion NMEA User Manual
GPS Receiver Module
Micro Modular Technologies Pte. Ltd.
Page 9 of 25
No. 3, Ubi Avenue 3, #03-02 Crocodile House 408857 Singapore
Tel: 65-6745-8832 Fax: 65-6293-0661 Email: sales@micro-modular.com
www.micro-modular.com
3.7
VTG – Course Over Ground and Ground Speed
This sentence contains the course and speed of the navigation solution.
$GPVTG,270.0,T,,,0.0,N,0.0,K,A*45
Name
Description
Type
Example
MsgID
VTG Header
$GPVTG
Tcourse
True Course (in degrees)
270.0
ReferenceT
T = True
T
Mcourse
Magnetic Course (in degrees)
<null>
ReferenceM
M = Magnetic
<null>
Speed
Speed (in knots)
0.0
UnitN
N = Knots (Nautical Miles per Hour)
N
SpeedKPH
Speed (in Kilometers per Hour)
0.0
UnitK
K = KPH
K
Mode
N = No fix
A = Autonomous
A
ChkSum
Checksum
*45
EOL
NMEA end of line
<CR> <LF>
Table 8 – VTG Sentence Fields