Specifically, the elements in each spatial period of m elements in the second line have {HEAD ~ m mutually different responses} corresponding to {TAIL ~ the dither code}, where m is at least 4 and is typically 16 
corresponding to
Specifically , the elements in each spatial period of m elements in the second line have { HEAD ~ m mutually different responses } corresponding to { TAIL ~ the dither code } , where m is at least 4 and is typically 16
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH