Chapter 3 SPAN Operation
OEM7 SPAN Installation and Operation User Manual v14
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For an example of how to solve for the IMU Body to Vehicle frame rotation refer to
If the rotation between the IMU Body frame and the Vehicle frame is not precisely known, enter an
approximate rotation (to the nearest 45 degrees). The precise offset can be estimated by carrying out
the
Body to Vehicle Frame Rotation Calibration Routine
SPAN Configuration with NovAtel Connect
NovAtel Connect provides a wizard that takes you through the steps required to configure a SPAN system. For
information about using the SPAN Configuration wizard in NovAtel Connect, refer to the help file available within
NovAtel Connect.
NovAtel Connect version 2.0 or greater is required for OEM7 receivers. Download the latest
NovAtel Connect software and documentation from
www.novatel.com/novatel-connect
SPAN Configuration with NovAtel Web User Interface
The SPAN parameters can be configured using the NovAtel Web User Interface. For information about using the
NovAtel Web User Interface, refer to the online OEM7 documentation (
).
3.3.5 Importance of RBV Calibration
For the SPAN system to provide the best performance, the rotation offset of the IMU body to the Vehicle frame
(RBV) should be known as accurately as possible. Since constraints happen at the vehicle level, any error in the
offset will translate into worse performance.
After the SPAN system has been installed and the appropriate translations and rotations have been applied (see
SPAN Configuration for Receiver Cards
on page 84 or
SPAN Configuration for PwrPak7
on page 88), the IMU
Body frame is aligned with the Vehicle frame. However, aspects of the mounting platform and vehicle design,
such as vehicle tilt, and slight misalignments in installation can cause the IMU Body frame to be slightly out of
alignment with the Vehicle frame. The misalignment of the IMU Body frame from the Vehicle frame will add a
bias to the SPAN solution.
The following diagrams show examples of a PwrPak7-E1 installed in a vehicle with misalignment issues.