GPRMB
Navigation information
|
Platform: |
OEM719, OEM729, OEM7500, OEM7600, OEM7700, OEM7720, PwrPak7, CPT7, CPT7700, SMART7, SMART2 |
This log contains navigation data from present position to a destination waypoint. The destination is set active by the receiver SETNAV command.
The GPRMB log outputs these messages without waiting for a valid almanac. Instead, it uses a UTC time, calculated with default parameters. In this case, the UTC time status (see the TIME log) 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. Then the UTC time status is set to VALID.
Message ID: 224
Log Type: Synch
Recommended Input:
log gprmb ontime 1
Example 1 (GPS only):
$GPRMB,A,4.32,L,FROM,TO,5109.7578000,N,11409.0960000,W,4.6,279.2,0.0,V,D*4A
Example 2 (Multi-constellation):
$GNRMB,A,4.32,L,FROM,TO,5109.7578000,N,11409.0960000,W,4.6,279.2,0.0,V,D*54
If the NMEATALKER command is set to AUTO, the talker (the first 2 characters after the $ sign in the log header) is set to GP (GPS satellites only), GL (GLONASS satellites only), GA (Galileo satellites only), GQ (for QZSS satellites only), GB/BD (for BeiDou satellites only) or GN (satellites from multiple systems).
See the Note in the GPGGA log that applies to all NMEA logs.
|
Field |
Structure |
Description |
Symbol |
Example |
|
1 |
$GPRMB |
Log header |
|
$GPRMB |
|
2 |
data status |
Data status: A = data valid; V = navigation receiver warning |
A |
A |
|
3 |
xtrack |
Cross track error Represents the track error from the intended course If the cross track error exceeds 9.99 NM, displays 9.99. One nautical mile (NM) = 1,852 metres. |
x.x |
5.14 |
|
4 |
dir |
Direction to steer to get back on track (L/R) Direction to steer is based on the sign of the crosstrack error, that is, |
a |
L |
|
5 |
origin ID |
Origin waypoint ID |
c--c |
FROM |
|
6 |
dest ID |
Destination waypoint ID |
c--c |
TO |
|
7 |
dest lat |
Destination waypoint latitude (DDmm.mm) |
llll.ll |
5109.7578000 |
|
8 |
lat dir |
Latitude direction (N = North, S = South) |
a |
N |
|
9 |
dest lon |
Destination waypoint longitude (DDDmm.mm) |
yyyyy.yy |
11409.0960000 |
|
10 |
lon dir |
Longitude direction (E = East, W = West) |
a |
W |
|
11 |
range |
Range to destination, nautical miles If the range to destination exceeds 999.9 NM, displays 999.9. |
x.x |
5.1 |
|
12 |
bearing |
Bearing to destination, degrees True |
x.x |
303.0 |
|
13 |
vel |
Destination closing velocity, knots |
x.x |
-0.0 |
|
14 |
arr status |
Arrival status: A = perpendicular passed V = destination not reached or passed |
A |
V |
|
15 |
mode ind |
Positioning system mode indicator, see Table: NMEA Positioning System Mode Indicator |
a |
A |
|
16 |
*xx |
Check sum |
*hh |
*6F |
|
17 |
[CR][LF] |
Sentence terminator |
|
[CR][LF] |
The fields origin ID, dest ID, dest lat, lat dir, dest lon and lon dir are tagged from the SETNAV command.
|
Mode |
Indicator |
|
A |
Autonomous |
|
D |
Differential |
|
E |
Estimated (dead reckoning) mode |
|
M |
Manual input |
|
N |
Data not valid |