User Manual

A NMEA-0183 Output
186 5700/5800 GPS Receiver User Guide
5700 & 5800 Reference
GST Position Error Statistics
An example of the GST message string is shown below. Table A.3
describes the message fields.
$GPGST,172814.0,0.006,0.023,0.020,273.6,
0.023,0.020,0.031*6A
10 M: unit of measure for height is meters
11 Geoid separation
12 M: geoid separation is measured in meters
13 Age of differential GPS data record, Type 1 or Type 9. Null field
when DGPS is not used.
14 Reference station ID, ranging from 0000 to 1023. A null field when
any reference station ID is selected and no corrections are
received.
Table A.3 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
Table A.2 GGA message fields (Continued)
Field Meaning