Airborne vector magnetic surveys

G - Physics – 01 – V

Patent

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Details

G01V 3/16 (2006.01) G01R 33/025 (2006.01) G01V 3/08 (2006.01) G01V 3/165 (2006.01) G01V 3/38 (2006.01) G01V 3/40 (2006.01)

Patent

CA 2475804

An aircraft equipped for airborne vector magnetic exploration surveys comprising three magnetometers orthogonally mounted to measure the components of the earth's vector magnetic field; two rotation sensors mounted to measure the angular orientation of the aircraft; and a recording system to record the measurements of the magnetometers and rotation sensors. The measured angular orientation is used to orientate the measured components of the earth's vector magnetic field to derive true vector aero-magnetic (VAM) data from airborne surveys. Also disclosed is a method for processing magnetic data by removing the permanent, induced, and eddy-current magnetic effects of the aircraft from the magnetic data.

L'invention concerne un aéronef équipé d'une prospection aéromagnétique vectorielle comprenant trois magnétomètres montés de façon orthogonale de manière à mesurer les composants du champ magnétique vectoriel de la terre, deux capteurs de rotation montés de manière à mesurer l'orientation angulaire de l'aéronef, et un système d'enregistrement permettant d'enregistrer les mesures des magnétomètres et des capteurs de rotation. L'orientation angulaire mesurée est utilisée en vue d'orienter les composants mesurés du champ magnétique vectoriel de la terre afin de dériver des données aéromagnétiques vectorielles réelles (WAM) issues des prospections aéromagnétiques. L'invention concerne également un procédé de traitement de données magnétiques par retrait des effets magnétiques à courant de Foucault, induits et permanents de l'aéronef des données magnétiques.

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