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