RoyalTek Confidential
15
REB-1315S5 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:
$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
