A method and {HEAD ~ apparatus} for determining {TAIL ~ the relative positions} of a first object and a second object  
A method and { HEAD ~ apparatus } for determining { TAIL ~ the relative positions } of a first object and a second object
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH