Levave GPS-R35, Руководство пользователя

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GPS-R35 User Manual
Levave
www.levave.com
Page 15 of 17
VTG
―
Course Over Ground and Ground Speed
Table 1-12 contains the values for the following example:
$GPVTG,309.62,T, ,M,0.13,N,0.2,K,A*23
table 1-12 VTG Data Format
Name Example Units Description
Message ID $GPVTG VTG protocol header
Course 309.62 degrees Measured herding
Reference T True
Course degrees Measured heading
Reference M
Magnetic
1
Speed 0.13 knots Measured Horizontal speed
Units N knots
Speed 0.2 km/hr Measured horizontal speed
Units K Kilometers per hour
Mode A A=Autonomouse, D=DGPS, E=DR
Checksum *23
<CR><LF> End of message termination
1. SiRF Technology Inc. dose not support magnetic declination. All “course over
ground” data are geodetic WGS84 directions.