Polarimetric borehole radar measurement at the Mirror Lake test site

Motoyuki Sato, Moriyasu Takeshita, Takashi Miwa, John W. Lane

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


In order to understand the potential of polarimetric borehole radar, field measurement was carried out at the Mirror Lake fractured rock research site (NH, USA), in October 1998. The polarimetric borehole radar system can measure the full-polarimetry in a borehole by changing antenna arrangements. We developed a network analyzer based stepped-frequency radar. The radar penetration depth from the borehole in the reflection measurement was over 10 m, in the frequency range of 2-200MHz. We could observe many clear reflections form fractures in each polarization state. Even in the raw data, we could observe the difference in the radar profile for different polarization states. Polarimetric future for the acquired data is analyzed and it was found that the depolarization effect is different in each fracture. We think this is closely related to the roughness of each fracture, and it is also related to physical properties of the fracture such as water permeability. Cluster analysis was tested for classification of fractures.

Original languageEnglish
Pages (from-to)104-112
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1999 Dec 1
EventProceedings of the 1999 Subsurface Sensors and Applications - Denver, CO, USA
Duration: 1999 Jul 191999 Jul 21

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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