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GNSS Compass Reference Manual • Using GNSS Compass
7 Using GNSS Compass
This section covers the following topics:
7.1 Filter Initialisation
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7.2 Hot Start
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7.3 Time
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7.4 Heading Sources
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7.6 NMEA 0183
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7.5 NMEA 2000
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7.7 Sensor Ranges
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7.8 Vehicle Profiles
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7.9 RTK
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7.10 Heave
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7.11 Environmental Exposure
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7.12 Upgrading the GNSS Compass Firmware
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7.1 Filter Initialisation
There are four different levels of filter initialisation on GNSS Compass. These are orientation, navigation,
heading and time. The initialisation of each can be monitored by inspecting the
or 8.2.6 View Menu in the GNSS Compass Manager.
Figure 15: Initialisation Levels
After all four levels of initialisation, the GNSS Compass INS filter takes several minutes to achieve its full
accuracy. It is recommended to wait two minutes after initialisation for applications requiring high accuracy.
7.1.1 Orientation Initialisation
Orientation initialisation occurs automatically upon power on and typically completes within seconds. To
determine its orientation it uses the accelerometers to measure the gravity vector. Random accelerations from
environmental sources can disturb this process, which can introduce minor orientation errors that will be
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8.1.2.3 Status view in the web UI
04 Nov 2021