The first SATPS receiver/processor is adapted for determining the difference, if any, between the location, known with high accuracy, of the reference station and {HEAD ~ the location} of {TAIL ~ the reference station} as determined by the SATPS satellite signals 
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The first SATPS receiver / processor is adapted for determining the difference , if any , between the location , known with high accuracy , of the reference station and { HEAD ~ the location } of { TAIL ~ the reference station } as determined by the SATPS satellite signals
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH