NMEA-0183 message: GST
Position error statistics
An example of the GST message string is:
$GPGST,172814.0,0.006,0.023,0.020,273.6,0.023,0.020,0.031*6A
The Talker ID ($--) will vary depending on the satellite system used for the position solution:
- $GP - GPS only
- $GL - GLONASS only
- $GN - Combined
GST message fields
| Field | Meaning |
|---|---|
| 0 | Message ID $GPGST |
| 1 | UTC of position fix |
| 2 | RMS value of the pseudorange residuals; includes carrier phase residuals during periods of RTK (float) and RTK (fixed) processing |
| 3 | Error ellipse semi-major axis 1 sigma error, in meters |
| 4 | Error ellipse semi-minor axis 1 sigma error, in meters |
| 5 | Error ellipse orientation, degrees from true north |
| 6 | Latitude 1 sigma error, in meters |
| 7 | Longitude 1 sigma error, in meters |
| 8 | Height 1 sigma error, in meters |
| 9 | The checksum data, always begins with * |