Command and Log Reference
40
4
*XX
Checksum
*hh
*15
5
[CR][LF]
Sentence terminator
[CR][LF]
6.1.11
GPRMC GNSS Recommended Information
This command is used to log time, date, position, heading and velocity data
calculated by receivers. RMC is the recommended minimum navigation data for
receivers.
The GPRMC log outputs these messages without waiting for a valid almanac.
Instead, it uses a UTC time, calculating with default parameters. In this case, the UTC
time status is set to WARNING since it may not be one hundred percent accurate.
When a valid almanac is available, the receiver uses the real parameters to calculate.
Then the UTC time status is set to VALID.
Recommend Input:
Output 1Hz GPRMC message from current serial port:
GPRMC 1
Output 1Hz GPRMC message from com2:
GPRMC COM2 1
LOG output
$GPRMC,094403.00,A,4004.73794422,N,11614.18999462,E,0.037,5.5,
260815,6.5,W,A*35
Table 6-12: GPRMC Message Description
ID
Field
Description
Symbol
Example
1
$GPRMC
Log header
$GPRMC
2
utc
UTC time of the current position
hhmmss.ss
144326.00
3
pos status
Position status:
A = Data valid, V = Positioning invalid
A
A
4
lat
Latitude (DDmm.mm)
llll.ll
5107.0017737
5
lat dir
Latitude direction (N = North, S = South) a
N
6
lon
Longitude (DDDmm.mm)
yyyyy.yy
11402.3291611
7
lon dir
Longitude direction (E = East, W = West) a
W
8
speed Kn
Speed over ground, knots
x.x
0.080
9
track true
Course Over Ground, degrees True
x.x
323.3
10
date
Date: dd/mm/yy
xxxxxx
210307
11
mag var
Magnetic variation, degrees
x.x
0.0
12
var dir
Direction of magnetic variation
(E = East, W = West)
a
E
13
mode ind
Positioning mode indicator:
A = Autonomous mode
D = Differential mode
a
A
