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enhanced position and velocity solution that can withstand GNSS drop outs.
12.2 The Sensor Co-ordinate Frame
Inertial sensors have 3 different axes: X, Y and Z and these determine the references around which angles and
accelerations are measured. It is very important to align these axes correctly in installation, otherwise the
system won't work correctly.
These axes are marked on the top of the device as shown in
below, with the X axis
pointing in the direction of the connectors, the Z axis pointing down through the base of the unit and the Y axis
pointing off to the right.
Figure 77: Boreas Axes
12.2.1 Right Hand Rule
When installed in an application the X axis should be aligned such that it points forwards and the Z axis aligned
so that it points down when the system is level. A good way to remember the sensor axes is the right hand rule,
which is visualised in
Figure 78: First Right-hand Rule
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