The location and orientation of the device relative to {TAIL ~ the origin} and {HEAD ~ initial orientation} is derived based on the movement data 
The location and orientation of the device relative to { TAIL ~ the origin } and { HEAD ~ initial orientation } is derived based on the movement data
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH