An array of accelerometers fixed with respect to {TAIL ~ one} another may detect {HEAD ~ acceleration} in sufficient orthogonal directions to accurately describe the movements of the array when the accelerations are doubly integrated 
An array of accelerometers fixed with respect to { TAIL ~ one } another may detect { HEAD ~ acceleration } in sufficient orthogonal directions to accurately describe the movements of the array when the accelerations are doubly integrated
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH