The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 2004
Filed:
Dec. 23, 2002
Anthony R. Barringer, Golden, CO (US);
Other;
Abstract
A magnetotelluric geophysical survey system used with an airborne survey bird for natural resource exploration of oil and gas, mineral deposits and aquifers. The survey system uses natural electromagnetic EM fields as an energy source. The magnetotelluric airborne survey system includes an aerodynamic airborne survey bird adapted for being towed behind a helicopter or fixed wing aircraft. The survey system can also be incorporated into a fixed wind aircraft. The survey system includes a non-conductive nose boom on the survey bird with orthogonal electric dipoles for measuring electric fields from 0.01 Hz up to 480 Hz. An angular motion detector is mounted inside the bird and used for compensating for errors caused by angular motion of the bird when in the presence of strong electric field gradients. The survey bird can use a single magnetometer or pairs of magnetometers for measuring electromagnetic gradients. The magnetometers are attached to angular motion detectors for compensating for errors caused by angular motion of a line between the magnetometers, when in the presence of strong magnetic gradients. The bird can also includes the orthogonal axis coils for measuring natural magnetic fields in a frequency range of 3 to 480 Hz. The airborne survey system is used in conjunction with a ground base station that includes a cesium magnetometer, associated recording equipment and a GPS time reference for synchronization with the airborne data.