Chapter 4 SPAN Operation
CPT7 and CPT7700 Installation and Operation User Manual v12
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Figure 20: Local-Level Frame (ENU)
4.1.2 The IMU Body Frame
The definition of the IMU Body frame is given by the physical axes of the IMU and represents how the sensors
are mounted inside the IMU. The IMU Body frame axes are marked on the CPT7. Refer to
on page 167 for illustrations of the IMU Body frame axes.
The axis marking on the CPT7 indicates the orientation of the X, Y and Z axis only. It does not indicate
the center of navigation. For the location of the center of navigation, refer to
CPT7/CPT7700 Center of Navigation
The origin of this frame is not the enclosure center, but the center of navigation (sensor center).
Figure 21: IMU Body Frame Marking
