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지질조사와 자원연구를 선도하는 한국지질자원연구원 korea institute of geoscience and mineral resouces

논문 상세정보

논문 상세정보
학회/학술지명 Near Surface Geoscience Conference 2019 주저자 정수철
발표매체 학술발표 국가명 네덜란드
논문명 국문 Development of 3D inversion algorithm for time-domain airborne electromagnetic data
영문 Development of 3D inversion algorithm for time-domain airborne electromagnetic data
발표일 2019.09.10
관련과제 북한 광물자원 탐사기술 실증 및 잠재성 평가 바로가기
초록 Recently, airborne time-domain electromagnetic (ATEM) methods are gaining popularity for applications in mining, geotechnical, and environmental problems due to their efficiency in covering vast areas. To interpret ATEM data, 1D methods are commonly used because of their efficiency in handling large scale data. However, 1D methods yield an erroneous resistivity model when their basic assumptions are violated. In this study, we developed 3D inversion algorithm for ATEM data which is based on inverse Fourier transformation of frequency-domain responses and sensitivity. To efficient calculation of the multisource response and sensitivity, an edge-based finite element method with the direct solver is adopted. In addition, to reduce time for calculating sensitivity, a moving footprint approach was also used. In numerical experiment with simple 3D model containing conductive targets, subsurface model was successfully reconstructed.

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