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166 MiLLennium GPSCard SW Version 4.503/4.52 Command Descriptions Manual Rev 2
GPGST Pseudorange Measurement Noise Statistics
Pseudorange measurement noise statistics are translated in the position domain in order to give statistical measures
of the quality of the position solution.
Structure:
Example:
$GPGST,192911.0,28.7,21.6,12.0,20.4,20.7,13.6,11.9*51[CR][LF]
$GPGST utc rms smjr std smnr std
orient
lat std
lon std alt std *xx [CR][LF]
Field Structure Field Description Symbol Example
1 $GPGST Log header $GPGST
2 utc UTC time of position (hours/minutes/seconds/ decimal seconds) hhmmss.ss 192911.0
3 rms RMS value of the standard deviation of the range inputs to the
navigation process. Range inputs include pseudoranges and DGPS
corrections.
x.x 28.7
4 smjr std Standard deviation of semi-major axis of error ellipse (meters) x.x 21.6
5 smnr std Standard deviation of semi-minor axis of error ellipse (meters) x.x 12.0
6 orient Orientation of semi-major axis of error ellipse (degrees from true north) x.x 20.4
7 lat std Standard deviation of latitude error (meters) x.x 20.7
8 lon std Standard deviation of longitude error (meters) x.x 13.6
9 alt std Standard deviation of altitude error (meters) x.x 11.9
10 *xx Checksum *hh *51
11 [CR][LF] Sentence terminator [CR][LF]