Fig 13. Values of θ_impact across the array constrain possible head configurations relative to the surface.

A. A grey dot is placed at each distance-pitch-yaw configuration associated with a unique pattern of θ_impact across the array. Approximately 37% of the configurations can be uniquely determined if the values of θ_impact are known to within 5°. Note the non-unique region at distances less than 5mm. B. The value of θ_impact averaged within each row for different distance and pitch configurations (yaw = 0°). C. The value of θ_impact averaged within each column for the same configurations as in B (yaw = 0°).