| 講演名 | 2009-11-02 Dependency of Backscattering from Ocean Surface on Wind Direction by using Pi-SAR : Low wind speed case(WSANE 2009 (Workshop for Space, Aeronautical and Navigational Electronics)) , |
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| 抄録(和) | |
| 抄録(英) | The dependency of backscattering from ocean surface on wind direction under relatively weak wind speed (～5m/s) is analyzed using observation data with three directions of illumination by an airborne dual-frequency synthetic aperture radar (SAR) in the L- and X-bands. In the X-band, the dependencies of the NRCSs in the parallel polarizations show different features each other. The NRCS difference between up- and down-wind conditions depends on the incidence angle in the X-band HH polarization, though that in the VV polarization, the NRCS difference is almost zero. Moreover, the NRCS difference between parallel- and cross-wind conditions in VV polarization is greater than that in the HH polarization. Though the dependency of the NRCS in the L-band on the wind direction is smaller than that in the X-band, the NRCSs in the L-band cross polarizations under the cross-wind condition is greater than that under the parallel-wind condition. The polarization ratio (PR) in the X-band shows the dependency on the wind direction. The PR difference between up- and down-wind directions depends on the incidence angle as the incidence angle dependency in the X-band HH polarization. The dependency of the PR in the L-band on wind direction is also weaker than that in the X-band. The results suggest the possibility of ocean wind measurement using the polarimetric SAR in the X-band and/or using the dual-frequency SAR. |
| キーワード(和) | |
| キーワード(英) | Ocean Winds / Radar Cross Section / Polarization Ratio / Synthetic Aperture Radar |
| 資料番号 | SANE2009-95 |
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| 研究会情報 | |
| 研究会 | SANE |
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| 開催期間 | 2009/10/26(から1日開催) |
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| 申込み研究会 | Space, Aeronautical and Navigational Electronics (SANE) |
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| 本文の言語 | ENG |
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| タイトル（英） | Dependency of Backscattering from Ocean Surface on Wind Direction by using Pi-SAR : Low wind speed case(WSANE 2009 (Workshop for Space, Aeronautical and Navigational Electronics)) |
| サブタイトル（和） | |
| キーワード(1)（和/英） | / Ocean Winds |
| 第 1 著者 氏名（和/英） | / Akitsugu NADAI |
| 第 1 著者 所属（和/英） | Strategic Planning Department, National Institute of Information and Communications Technology |
| 発表年月日 | 2009-11-02 |
| 資料番号 | SANE2009-95 |
| 巻番号（vol） | vol.109 |
| 号番号（no） | 265 |
| ページ範囲 | pp.- |
| ページ数 | 6 |
| 発行日 | |