{TAIL ~ The basic SATPS method} may also be augmented by the use of {HEAD ~ one or more reference stations} at known locations 
{ TAIL ~ The basic SATPS method } may also be augmented by the use of { HEAD ~ one or more reference stations } at known locations
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH