Patent ID: 11872042
Assignee: HI LLC
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 13:
14. A calibration method for a magnetometer having an unknown gain, comprising:
generating a calibrating magnetic field at a known amplitude at the magnetometer and at a calibration frequency outside of a linear operating range of the magnetometer;
reporting a measurement of the calibrating magnetic field by the magnetometer;
computing a product of the known amplitude of the calibrating magnetic field at the magnetometer and a roll-off gain error of the magnetometer characterizing roll-off effects of a gain of the magnetometer at a reference frequency within the linear operating range of the magnetometer and a gain of the magnetometer at the calibration frequency;
computing a first ratio of an amplitude of the calibrating magnetic field measurement reported by the magnetometer and the computed product; and
determining the unknown gain of the magnetometer at least partially based on computed first ratio.