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