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MiLLennium Command Descriptions Manual 147
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 (metres) x.x 21.6
5 smnr std Standard deviation of semi-minor axis of error ellipse (metres) 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 (metres) x.x 20.7
8 lon std Standard deviation of longitude error (metres) x.x 13.6
9 alt std Standard deviation of altitude error (metres) x.x 11.9
10 *xx Checksum *hh *51
11 [CR][LF] Sentence terminator [CR][LF]
10