| 講演要旨(和文) | | GPRイメージは、送信機、受信機、地表面下のターゲットの間の相対的な幾何配置に依存して変わる。ビバルディアンテナを用いてGPRのポラリメトリデータHH, HV, VH, VVの取得を行った。そして、ポラリメトリデータの情報を用いて、金属線のポラリメトリック的な振る舞いについて調べる試みをした。その結果、得られたデータはポラリメトリの基本的な特徴をよく満たしていることを確認した。 |
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| | 講演要旨(英文) | | Ground penetrating radar GPR images depend strongly on the relative geometry between the transmitter, the receiver and the subsurface target. This dependence results from the polarization properties of the antennae and from the sensitivity of the reflector to the polarization of the incident electromagnetic wave. The GPR full polarimetry HH, HV, VH, VV data are obtained with Vivaldi antenna in the sand pit to detect buried target. The radar system consist a Vector Network Analyzer VNA, Vivaldi antennas, an antenna positioner unit, and a PC based control unit. Co-polarization reflection measurement was very sensitive to the large amplitude direct wave. Cross polarization of transmitter and receiver antennas significantly diminishes the surface reflection integrated at the receiving antenna. We have analyzed polarimetric characteristics of the target. We confirm the polarization behavior of the target is well described by the theoretical scattering matrix. |
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