Optional compact IMU allows output of XYZ acceleration, angle, and angular speed. IMU is the measurement original point of LC-8300. When it is set at a center of gravity of a vehicle, the acceleration, angle, and angular speed of that position are measured.

So that means the acceleration, angle, and angular speed of the vehicle itself are measured by setting IMU at a center of gravity of the vehicle. From the point of view of speed·distance measurement, the accuracy is improved when IMU and antenna are located on the same vertical line.