Figure 11.

Recorded (a) X-Z positions and (b) height at each of the grid locations. No data could be recorded at the black locations due to the loss of tracking. (c) Offsets from the mean measured position (left panels) or orientation (right panels) for 20 trials. The shaded areas indicate the range of position or orientation values seen during a 1-min recording. For Trial 16, the offset was 146 cm along the Y axis, −55 cm along the Z axis, 6.1° yaw, 19.3° pitch, and −3.8° roll. For Trial 18, the offset was 153 cm along the Y axis, −57 cm along the Z axis, 6.2° yaw, 18.6° pitch, and −3.9° roll.