NMEA-0183 message: GST

Position error statistics

An example of the GST message string is:

GST message fields

Field

Meaning

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 *