34 | Data output
5,6 -- Longitude, E/W
7 ---- Speed over ground, knots
8 ---- Course Over Ground, True
9 ---- Date: dd/mm/yy
10,11 - Magnetic variation, degrees E/W.
Easterly variation (E) subtracts from
True course, Westerly variation (W) adds
to True course.
(6)
GST
- GNSS Pseudorange Error Statistics
This message is used to support Receiver Autonomous
Integrity Monitoring (RAIM). Pseudorange measurement
error statistics can be translated in the position domain
in order to give statistical measures of the quality of the
position solution.
If only GPS, GLONASS, etc. is used for the reported
position solution, the talker ID is GP, GL, etc., and the
error data pertains to the individual system. If satellites
from multiple systems are used to obtain the reported
position solution, the talker ID is GN and the errors
pertain to the combined solution.
Notes: 1 ---- UTC time of the GGA or GNS fix associated
with this sentence.
2 ---- RMS value of the standard deviation of the
range inputs to the navigation process.
Range inputs include preudoranges &
DGNSS corrections.
3 ---- Standard deviation of semi-major axis of
error ellipse (meters)
4 ---- Standard deviation of semi-minor axis of
error ellipse (meters)
5 ---- Orientation of semi-major axis of error
ellipse (degrees from true north)
6 ---- Standard deviation of latitude error
(meters)
$GPGST,hhmmss.ss,x.x,x.x,x.x,x.x,x.x,x.x,x.x*hh<CR><LF>
1
2 3 4
5 6 7 8
