The improved signal restoring 15 wherein {TAIL ~ said reference region} is along {HEAD ~ a crosstrack edge} of the platen 
The improved signal restoring 15 wherein { TAIL ~ said reference region } is along { HEAD ~ a crosstrack edge } of the platen
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH