Intel E810-CQDA2T - Enabling and Disabling Additional Constellations; Perform Survey-In for New Location Setup

Intel
®
Ethernet Network Adapter E810-CQDA2T
User Guide
38 722960-002
4.15.4 Enabling and Disabling Additional Constellations
Before enabling survey-in functionality to achieve precise time information, it is beneficial to enable
additional constellations. With more constellations enabled, the GNSS receiver can access more
satellites, allowing better precision with good sky view. It is up to the user which constellations should
be enabled. It is recommended to enable at least the GALILEO constellation for better timing
capabilities.
To enable constellations in RAM, use the following commands (this will take a few minutes for the
receiver to see constellations):
# ubxtool -P 29.20 -e BEIDOU,1 -w 2 - Chinese constellation
# ubxtool -P 29.20 -e GLONASS,1 -w 2 - Russian constellation
# ubxtool -P 29.20 -e GPS,1 -w 2 - American constellation
# ubxtool -P 29.20 -e SBAS,1 -w 2 - Regional Satellite-based Augmentation Systems
# ubxtool -P 29.20 -e GALILEO,1 -w 2 - European constellation
To disable GLONASS constellation in RAM, use the following command:
# ubxtool -P 29.20 -d GLONASS,1 -w 2
To check enabled constellations in all layers, use the following command:
# ubxtool -v 1 -P 29.20 -g CFG-SIGNAL -v 1 -w 2
4.15.5 Perform Survey-In for New Location Setup
To achieve precise time information, the GNSS module needs to do a process “survey-in”. This process
can take up to 24 hours to achieve best precision. Depending on the antenna placement and view of the
sky, you might not be able to achieve certain survey-in precision.
It is suggested to start with 50 m precision and 600-second survey in time.
Note: The 50 m precision and the 600 second survey in time is just an example (or a starting
point). Most likely you will want to use better a precision value and a longer survey-in time for
better accuracy. This depends on your location, sky view, signal quality, and your antenna.
For survey-in, use the ubxtool -t -w 5 -P 29.20 -v 1 -e SURVEYIN,<time_in_sec> ,
<precision_in_mm> command:
# ubxtool -t -w 5 -P 29.20 -v 1 -e SURVEYIN,600,50000
ubxtool: enable SURVEYIN,600,50000
sent:
1667189015.3247
UBX-CFG-TMODE3:
version 0 reserved1 0 flags x1
ecefXOrLat 0 ecefYOrLon 0 ecefZOrAlt 0
ecefXOrLatHP 0 ecefYOrLonHP 0 ecefZOrAltHP 0
reserved2 0 fixedPosAcc 0 svinMinDur 600 svinAccLimit 50000
reserved3 0 0