RoyalTek RSA-1500L 用户手册
16
RSA-1500L User Manual
Course Over
Ground
309.62
degrees True
Date
120598
ddmmyy
Magnetic Variation
degrees E=east or W=west
Mode
A
A=Autonomous, D=DGPS, E=DR
Checksum
*10
2.1.6 VTG-Course Over Ground and Ground Speed
Table 2-10 contains the values of the following example:
$GPVTG, 309.62, T, , M, 0.13, N, 0.2, K*6E
Table 2-10 VTG Data Format
Name
Example
Units
Description
Message ID
$GPVTG
VTG protocol header
Course
309.62
degrees Measured heading
Reference
T
True
Course
degrees Measured heading
Reference
M
Magnetic
Speed
0.13
knots
Measured horizontal speed
Units
N
Knots
Speed
0.2
km/hr
Measured horizontal speed
Units
K
Kilometer per hour
Mode
A
A=Autonomous, D=DGPS, E=DR
Checksum
*6E
＜CR＞＜LF＞
End of message termination