Variations in the reflected energy caused by {HEAD ~ intrusion} of the area adjacent the coil, including the areas above or beneath the coil, are processed by {TAIL ~ detection system signal processing equipment} to determine the incidence and location of intrusion events 
Variations in the reflected energy caused by { HEAD ~ intrusion } of the area adjacent the coil , including the areas above or beneath the coil , are processed by { TAIL ~ detection system signal processing equipment } to determine the incidence and location of intrusion events
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH