Matrix 908 Field Computer
35
98-01578-EN R0
Position Quality Requirements
Select between using ClearPath or SBAS. SBAS must be enabled below in the "SBAS Availability" setting for the SBAS option to be
presented.
The table below shows the GGA Quality Indicator that can be expected from different GNSS signal types.
GNSS Signal Type
GGA Quality Indicator
Typical Accuracy
Single Point / Autonomous GNSS
1
<2 m
Single Point / Autonomous GNSS with GLIDE/ClearPath
1
<1 m*
SBAS systems including WAAS, EGNOS, GAGAN, MSAS, etc.
2 or 9
0.7 m
TerraStar-L (converged)
2
40 cm
RTK (fixed)
4
1.0 cm + 1 ppm
RTK (float)
5
4 cm
TerraStar-C (converged)
5
4 cm
OmniStar HP/XP/G2
5
~10 cm
*For a 60 minute period.
SBAS Availability
Enable if SBAS (e.g. EGNOS, GAGAN, MSAS, SDCM, WAAS) differentially corrected signals are to be used.
TerraStar Availability
Enable if TerraStar services are to be used.
ADVANCED SETTINGS
GNSS Refresh
The refresh GNSS position button will reset the ClearPath filter in the OEMStar receiver in cases where the user has had the receiver running
in close proximity to heavy tree cover and/or buildings. In Advanced more, the ClearPath filter will be reset automatically when starting a new
job or an existing job.
NOTE: After pressing GNSS Refresh the user is required to wait approximately 10 minutes for full operation and expected GNSS accuracy.
Activating the refresh while in a job will cause a momentary interruption in the relay of GNSS data. This will most likely result in
sections already on in automatic BoomPilot
mode to go off for a short period of time.
The refresh should not be done during active
application.
GNSS Type Selection
GPS uncorrected signals from the GPS system are
always available and cannot be disabled.
Indicated when the following uncorrected signals are
NOT available:
X
GLONASS
X
Galileo
X
Beidou
X
QZSS
