The processor also calculates values related to an actual magnetic field strength using the set of signals from the magnetic sensors and determines values related to {HEAD ~ the location} of each of the plurality of magnets based on a difference between the values related to the predicted magnetic field strength and the values related to {TAIL ~ the actual magnetic field strength} 
The processor also calculates values related to an actual magnetic field strength using the set of signals from the magnetic sensors and determines values related to { HEAD ~ the location } of each of the plurality of magnets based on a difference between the values related to the predicted magnetic field strength and the values related to { TAIL ~ the actual magnetic field strength }
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 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL