Trimble Outdoors aggps 332 Benutzerhandbuch
C NMEA-0183 Messages
8 8 AgGPS 332 GPS Receiver User Guide
C.8
GST (GPS PRN)
The
GST
message is used to support Receiver Autonomous Integrity
Monitoring (
RAIM
).
The GST message structure is:
$GPGST,220320.0,1.3,0.8,0.5,166.1,0.8,0.5,1.6,*4F
Table C.8 describes these fields.
Note –
Because the contents of this NMEA message do not change
significantly during a one-second interval, the receiver outputs this
message at a maximum rate of 1 Hz.
message at a maximum rate of 1 Hz.
Table C.8
GST message fields
Field
Description
1
UTC
time of
GGA
fix
2
RMS
value of the standard deviation of the range inputs to the
navigation process (range inputs include pseudoranges and
DGPS
corrections)
3
Standard deviation of semi-major axis of error ellipse, in meters
4
Standard deviation of semi-minor axis of error ellipse, in meters
5
Orientation of semi-major axis of error ellipse, in degrees from true
north
north
6
Standard deviation of latitude error, in meters
7
Standard deviation of longitude error, in meters
8
Standard deviation of altitude error, in meters