In one embodiment, both the sign and {TAIL ~ magnitude} of {HEAD ~ the data} are used in the correlation to further increase the fault tolerance 
In one embodiment , both the sign and { TAIL ~ magnitude } of { HEAD ~ the data } are used in the correlation to further increase the fault tolerance
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH