Adjusting {HEAD ~ the operating parameter} could be based on {TAIL ~ a difference} between a measured anisotropy of the first surface and a measured anisotropy of the second surface 
Adjusting { HEAD ~ the operating parameter } could be based on { TAIL ~ a difference } between a measured anisotropy of the first surface and a measured anisotropy of the second surface
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH