Back spin is calculated by using angle of approach, club head speed and the contact point.
Side spin is calculated by the horizontal escape direction and the exact impact angle which is measured by tracing the horizontal club path. 3 light-curtain sensor are used to trace the horizontal club path.
The tilted sensor measures the ball speed and the launch angle. The floor sensor measures the ball direction and the speed(secondary).
To measure the accurate launch angle, especially when the ball is on the tee, the system takes into account the current tee height as well as the detected pass through point.
8 Channel impact sensor measures the exact impact point location and the power of the impact. The impact point indicator shows where exactly the club head hit the ground.