Changing the area upon which AGC adjustments are applied permits {HEAD ~ better scene selection} according to {TAIL ~ the present invention} 
according to
Changing the area upon which AGC adjustments are applied permits { HEAD ~ better scene selection } according to { TAIL ~ the present invention }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL