NMEA-0183 message: GRS
GRS range residuals
The GRS message is used to support the Receiver Autonomous Integrity Monitoring (RAIM).
NOTE – Because the contents of this NMEA message do not change significantly during a one-second interval, the receiver outputs this message at a maximum rate of 1 Hz.
An example of the GRS message string is:
$GPGRS,220320.0,0,-0.8,-0.2,-0.1, -0.2,0.8,0.6,,,,,,1,*55
GRS message fields
Field |
Meaning |
---|---|
0 |
Message ID $GPGRS Talker ID can be: |
1 |
UTC of GGA position fix |
2 |
Residuals: 0: Residuals used to calculate position given in the matching GGA line |
3–14 |
Range residuals for satellites used in the navigation solution, in meters |
15 |
Satellite System ID: GP(1), GL(2), GA(3), GB(4), GQ(0) |