Multitech MTCMR-E1 Manuel d'utilisateur Page 106

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Chapter 16 – GPS Device AT Commands
106 Universal IP AT Commands Reference Guide
VTG – Course Over Ground and Ground Speed
The Actual course and speed relative to the ground.
Structure: GPVTG,x.x,T,,M,x.x,N,x.x,K,a*hh<CR><LF>
Example: $GPVTG, 000.0,T,,M,000.0,N,0000.0,K,A*3D<CR><LF>
Name
Example
Description
Message ID
$GPVTG
VTG Protocol Header
Course
000.0
True course over ground in degrees (000.0 ~ 359.9)
Reference
T
True
Course
,
Measured heading (degrees)
Reference
M
Magnetic
Speed
000.0
Speed over ground in knots (000.0 ~ 999.9)
Units
N
Knots
Speed
0000.0
Speed over ground in kilometers per hour (0000.0 ~ 1800.0)
Units
K
Kilometers per hour
Mode
A
‘N’ = not valid
‘A’ = Autonomous mode
‘D’ = Differential mode
‘E’ = Estimated (dead reckoning) mode
‘M’ = Manual input mode
‘S’ = Simulator mode
Checksum
*3D
<CR><LF>
<CR><LF>
End of message (termination)
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