Abstract
This paper introduces a rotation matrix method to extract and suppress the motion-induced noise in airborne AFMAG method. The rotation matrix method is a straight-forward method which achieves the coordinate transformation based on Euler angles and predicts the motion-induced noise by calculating the angle between the sensor's normal and the geomagnetic field in real time. The corrected data can be obtained by subtracting the predicted noise from the movement electromagnetic data. We analyze the influence of the Euler angles and geomagnetic field (inclination and declination) on motion-induced noise. The comparison of the simulation result with existing method in literature is given and the consistency of the predicted noise by the two approaches confirm the effectiveness of the proposed method. A field data motion-induced noise correction is implemented and the result shows that the noise can be reduced by one or two orders of magnitude at low frequencies by rotation matrix method.
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