At {TAIL ~ each sample time}, the accumulators 1175, 1176, 1177 and 1178 add {HEAD ~ the input} to a running correlation total 
At { TAIL ~ each sample time } , the accumulators 1175 , 1176 , 1177 and 1178 add { HEAD ~ the input } to a running correlation total
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH