EM Tomography by Extended Born Approximations

확장된 Born 근사에 의한 EM 토모그래피

  • Cho In-Ky (Dept. of Geophysics, Kangwon National University) ;
  • Sim Hyun-Mi (Dept. of Geology, Kangwon National University)
  • 조인기 (강원대학교 자연과학대학 지구물리학과) ;
  • 심현미 (강원대학교 대학원 지질학과)
  • Published : 1998.11.01

Abstract

EM tomography technique has been developed. The algorithm used the extended Born approximations for forward modeling and reconstructed a conductivity image by a smoothness constraint least squares inversion method. Observed data, the vertical components of secondary magnetic fields, were simulated with the 3-D integral equation code. The results showed that the location of anomalous body could be imaged very well, but conductivity of the body was lower than real one and the vertical resolution was much higher than the horizontal resolution.