Automatic Determination of the Azimuth Angle of Reflectors in Borehole Radar Reflection Data Using Direction-finding Antenna

방향탐지 안테나를 이용한 시추공 레이다 반사법 탐사에 있어서 반사층 방위각의 자동 결정

  • 김정호 (한국자원연구소 자원연구부) ;
  • 조성준 (한국자원연구소 자원연구부) ;
  • 이명종 (한국자원연구소 자원연구부) ;
  • 정승환 (한국자원연구소 자원연구부)
  • Published : 1998.11.01

Abstract

The borehole radar reflection survey can image the underground structure with high resolution, however, we cannot get any information on the orientation of the reflectors with dipole antenna alone. The direction-finding antenna system is commonly used to give the solution to the problem. However, the interpretation of the data from direction- finding antenna may be time-consuming, and sometimes have ambiguities in the sense of precise determination of the azimuth. To solve the problem, we developed the automatic azimuth finding scheme of reflectors in borehole radar reflection data using direction-finding antenna. The algorithm is based on finding the azimuthal angle possibly showing the maximum reflection amplitude in the least-squared error sense. The developed algorithm was applied to the field data acquired in quarry mine. It was possible to locate nearly all of the reflectors in three dimensional fashion, which coincide with the known geological structures and man-made discontinuities.