Radar polarimetry analysis applied to single-hole fully polarimetric borehole radar

Jian Guo Zhao, Motoyuki Sato

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

A fully polarimetric borehole radar system using four combinations of dipole and slot antennas was developed to acquire fully polarimetric data sets in drilled boreholes. First, to implement radar polarimetry analysis, a processing scheme suitable for analyzing a single-hole reflection data set acquired by the system is presented. This processing consists of antennacharacteristic compensation, migration for image reconstruction, and time-frequency analysis for single-frequency data set construction. Two polarimetric target decomposition methods, namely: 1) Pauli decomposition and 2) eigenvector-based decomposition, are applied to characterize the scattering problem of the subsurface fractures. The Pauli decomposition method provided important radar polarimetry information of fractures, and the eigenvector-based decomposition method made a significant contribution to understanding the scattering mechanisms from different fractures with different properties. Furthermore, information about fracture classification can be obtained by analysis of the H-alpha distribution provided by eigenvector-based decomposition of local radar image regions. The potential of polarimetric target decomposition techniques to fracture characterization is shown, which, in turn, provides valuable information about water permeabilities of fractures in hydrogeological studies.

Original languageEnglish
Pages (from-to)3547-3554
Number of pages8
JournalIEEE Transactions on Geoscience and Remote Sensing
Volume44
Issue number12
DOIs
Publication statusPublished - 2006 Dec

Keywords

  • F-K migration
  • Fracture characterization
  • Fully polarimetric borehole radar
  • H-alpha decomposition
  • Pauli decomposition
  • Radar polarimetry analysis
  • Subsurface sensing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Earth and Planetary Sciences(all)

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