OmniSTAR 8200HP User Manual
Issue 1.07, 10/2008
68
RMC – Recommended Minimum Specific GPS Data
The RMC message identifies the UTC time, status, latitude, longitude, speed
over ground (SOG), date and magnetic variation of the position fix.
$GPRMC,hhmmss.ss,A,ddmm.mmmmm,D,dddmm.mmmmm,D,sss.ss,T.T,D
DMMYY,mm.m,E*7C
Field Number Description
1 Time: UTC time of the position fix in hhmmss.ss
format
2 Status
A: Valid
V: Navigation Receiver Warning (V is output
whenever the receiver suspects something is wrong)
3 Latitude coordinates. The number of decimal places,
0-8, is programmable and determined by the
numeric precision selected in TSIP Talker for a RMC
message.
4 Latitude direction: N = North, S = South
5 Longitude coordinate. The number of decimal
places, 0-8, is programmable and determined by the
numeric precision selected in TSIP Talker for a RMC
message.
6 Longitude direction: W = West, E = East
7 Speed Over Ground (SOG) in knots (0-3 decimal
places)
8 Track Made Good, True, in degrees
9 Date in dd/mm/yy format
10 Magnetic Variation in degrees
11 Direction of magnetic variation
E: Easterly variation from True course (subtracts
from True course)
W: Westerly variation from True course (adds to
True course)
12 Mode Indication
A: Autonomous
D: Differential
F: Float RTK (HP/XP unconverged)
N: Data not valid
R: RTK (HP/XP converged)
Table 23: Description of the RMC message.
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