| Presentation | 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)) Akitsugu NADAI, Toshihiko UMEHARA, Takeshi MATSUOKA, Makoto SATAKE, Tatsuharu KOBAYASHI, Seiho URATSUKA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | 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. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Ocean Winds / Radar Cross Section / Polarization Ratio / Synthetic Aperture Radar |
| Paper # | SANE2009-95 |
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| Conference Information | |
| Committee | SANE |
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| Conference Date | 2009/10/26(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Space, Aeronautical and Navigational Electronics (SANE) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | 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)) |
| Sub Title (in English) | |
| Keyword(1) | Ocean Winds |
| Keyword(2) | Radar Cross Section |
| Keyword(3) | Polarization Ratio |
| Keyword(4) | Synthetic Aperture Radar |
| 1st Author's Name | Akitsugu NADAI |
| 1st Author's Affiliation | Strategic Planning Department, National Institute of Information and Communications Technology() |
| 2nd Author's Name | Toshihiko UMEHARA |
| 2nd Author's Affiliation | Applied Electromagnetic Research Center, National Institute of Information and Communications Technology |
| 3rd Author's Name | Takeshi MATSUOKA |
| 3rd Author's Affiliation | Applied Electromagnetic Research Center, National Institute of Information and Communications Technology |
| 4th Author's Name | Makoto SATAKE |
| 4th Author's Affiliation | Applied Electromagnetic Research Center, National Institute of Information and Communications Technology |
| 5th Author's Name | Tatsuharu KOBAYASHI |
| 5th Author's Affiliation | Applied Electromagnetic Research Center, National Institute of Information and Communications Technology |
| 6th Author's Name | Seiho URATSUKA |
| 6th Author's Affiliation | Applied Electromagnetic Research Center, National Institute of Information and Communications Technology |
| Date | 2009-11-02 |
| Paper # | SANE2009-95 |
| Volume (vol) | vol.109 |
| Number (no) | 265 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |