Figure 4. Turn component.

Turn component derived from the yaw axis. The upper figure shows the TUG yaw signal, where turn 1 and turn 2 components are evident as “concave” shaped objects. The lower figure shows a close-up of both yaw turns, depicting the turn yaw amplitude [deg/s] and the turn duration [s] measures (number of steps during the turns is not showed here, as it is derived from the vertical axis).