NMEA-0183 message: GBS

GNSS satellite fault detection (RAIM support)

An example of the GBS message string is:

$GPGBS,015509.00,-0.031,-0.186,0.219,19,0.000,-0.354,6.972*4D

GBS message fields

Field Meaning
0 Message ID $--GBS.

Talker ID can be:
GA: Galileo
GB: BeiDou
GP: GPS. To provide information specific to the GPS constellation when more than one constellation is used for the differential position fix.
GL: GLONASS. To provide information specific to the GLONASS constellation when more than one constellation is used for the differential position fix.
GN: Combined GNSS position. GNSS position fix from more than one constellation, for example, GPS and GLONASS.
GQ: QZSS

1 UTC of position fix
2 Expected error in latitude, in meters, due to bias, with noise = 0
3 Expected error in longitude, in meters, due to bias, with noise = 0
4 Expected error in altitude, in meters, due to bias, with noise = 0
5 ID number of most likely failed satellite
6 Probability of missed detection of most likely failed satellite
7 Estimate of bias, in meters, on the most likely failed satellite
8 Standard deviation of bias estimate
9 The checksum data, always begins with *

If NMEA-0183 version 4.10 is selected, the 9th, 10th, and 11th fields become:

Field Meaning
9 System ID based on:
GPS1
GLONASS2
Galileo3
BeiDou4
QZSS0
10 System ID based on:
GPS1
GLONASS1
Galileo7
BeiDouNull
QZSSNull
11 The checksum data, always begins with *