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Three-dimensional subterranean target identification by use of optimization techniques

Publiceringsår: 1991
Språk: Engelska
Sidor: 20
Publikation/Tidskrift/Serie: Technical Report LUTEDX/(TEAT-7013)/1-20/(1991)
Dokumenttyp: Rapport
Ytterligare information: Published version: Electromagnetic Waves PIER 15, Ed. J.A. Kong, pp. 141-164, EMW Publishing, Cambridge, Massachusetts, USA, 1997.


The identification of a subterranean metallic ore from scattering experiments,
conducted on the surface of the ground or in a bore hole, is a classic geophysical
problem. In general this problem is not well-posed. However, a priori
information about the shape of the target provides enough regularization to
make the problem numerically stable. The problem is solved by minimizing
the mean-square error between an eleven parameter model, based on the
null field approach, and the data. The optimization is done with a Newton
technique in which a singular value decomposition of the model Jacobian is
employed. The algorithm is very stable to noise and makes good reconstructions
from feasible starting guesses, for realistically noise contaminated data.



  • Electrical Engineering, Electronic Engineering, Information Engineering
  • Other Electrical Engineering, Electronic Engineering, Information Engineering


  • Electromagnetic theory

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