Based on a difference between the predicted values and {TAIL ~ the measured values}, {HEAD ~ the device} estimates a new location for each of the magnets and calculates new predicted magnetic field strength values 
Based on a difference between the predicted values and { TAIL ~ the measured values } , { HEAD ~ the device } estimates a new location for each of the magnets and calculates new predicted magnetic field strength values
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH