RoyalTek Confidential
19
REB-1315LPX Operational Manual
Table 8 RMC Data Format
Name
Example
Units
Description
Message ID
$GPRMC
RMC protocol header
UTC Time
161229.487
hhmmss.sss
Status
A
A=data valid or V=data not valid
Latitude
3723.2475
ddmm.mmmm
N/S Indicator
N
N=north or S=south
Longitude
12158.3416
dddmm.mmmm
E/W Indicator
W
E=east or W=west
Speed Over Ground
0.13
knots
True
Course Over
Ground
309.62
degrees
Date
120598
ddmmyy
Magnetic Variation
degrees
Variation sense
E=east or W=west (Not shown)
Mode
A
A=Autonomous, D=DGPS, E=DR
Checksum
*10
<CR><LF>
End of message termination
VTG-Course Over Ground and Ground Speed
Table 9 contains the values of the following example:
$GPVTG,79.65,T,,M,2.69,N,5.0,K,A*38
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
