Patent Document ID: 8907660
Application ID: 13518668
Patent Flag: 1

Claim One:
1. A method for identifying a subset of measurements comprising a disturbed measurement, said disturbed measurement being disturbed by a magnetic disturber, said method comprising emitting magnetic fields and measuring said magnetic fields with the aid of N mono-axial source/mono-axial transducer pairs so as to obtain a set of N real measurements, each real measurement of said set being distinguished from other real measurements of said set by at least one of position of a mono-axial source used to emit said magnetic field, position of a mono-axial transducer used to measure said magnetic field, and frequency of said magnetic field, one of said mono-axial source and said mono-axial transducer being tied to a mobile object and an other of said mono-axial source and said mono-axial transducer being tied to a frame of reference in which a position of said mobile object is to be expressed, constructing an estimated position Pi of said mobile object in said frame of reference based at least in part on an observer Oi and involving only a first subset Mi of said N real measurements, estimating said N real measurements based at least in part on said estimated position Pi and on at least one direct model linking said position of said mobile object to said set of N real measurements, and determining whether or not said first subset Mi of said N real measurements comprises a disturbed measurement by comparing said estimated measurements with said real measurements.