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REB-4315 Operational Manual
Table 9 VTG Data Format
Name Example
Units
Description
Message ID
$GPVTG
VTG protocol header
Course over rgound
79.65
degrees Measured heading
Reference T
True
Course over ground
degrees Measured heading
Reference M
Magnetic
Speed over ground
2.69
Knots
Measured speed
Units N
Knots
Speed over ground
5.0
Km/hr
Measured speed
Units K
Kilometer
per
hour
Mode A
A-autonomous,
D=DGPS,
E=DR
Checksum *38
<CR><LF>
End of message termination
GLL-Geographic Position – Latitude/Longitude
Table 10 contains the values of the following example:
Table 10 contains the values of the following example:
$GPGLL,2503.6319,N,12136.0099,E,053740.000,A,A*52
Table 10 GLL Data Format
Name Example
Units
Description
Message ID
$GPGLL
GLL protocol header
Latitude 2503.6319
ddmm.mmmm
N/S indicator
N
N=north or S=south
Longitude 12136.0099
Dddmm.mmmm
E/W indicator
E
E=east or W=west
UTC Time
053740.000
hhmmss.sss
Status
A
A=data valid or V=data not valid
Mode A
A=autonomous,
D=DGPS,
E=DR
Checksum *52
<CR><LF>
End of message termination