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| Presentation | 2009-11-02 15:15 Dependency of Backscattering from Ocean Surface on Wind Direction by using Pi-SAR -- Low wind speed case -- Akitsugu Nadai, Toshihiko Umehara, Takeshi Matsuoka, Makoto Satake, Tatsuharu Kobayashi, Seiho Uratsuka (NICT)  SANE2009-95 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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) |
| (in English) | ocean winds / radar cross section / polarization ratio / synthetic aperture radar / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 109, no. 265, SANE2009-95, pp. 73-78, Nov. 2009. | |
| Paper # | SANE2009-95 | |
| Date of Issue | 2009-10-26 (SANE) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | SANE2009-95 |
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| Conference Information | |
| Committee | SANE |
| Conference Date | 2009-11-01 - 2009-11-04 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Fudan University (Shanghai) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | WSANE 2009 (Workshop for Space, Aeronautical and Navigational Electronics) |
| Paper Information | |
| Registration To | SANE |
| Conference Code | 2009-11-SANE |
| Language | English |
| 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 |
| Sub Title (in English) | Low wind speed case |
| Keyword(1) | ocean winds |
| Keyword(2) | radar cross section |
| Keyword(3) | polarization ratio |
| Keyword(4) | synthetic aperture radar |
| Keyword(5) | |
| Keyword(6) | |
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| Keyword(8) | |
| 1st Author's Name | Akitsugu Nadai |
| 1st Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
| 2nd Author's Name | Toshihiko Umehara |
| 2nd Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
| 3rd Author's Name | Takeshi Matsuoka |
| 3rd Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
| 4th Author's Name | Makoto Satake |
| 4th Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
| 5th Author's Name | Tatsuharu Kobayashi |
| 5th Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
| 6th Author's Name | Seiho Uratsuka |
| 6th Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
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| Speaker | Author-1 |
| Date Time | 2009-11-02 15:15:00 |
| Presentation Time | 20 minutes |
| Registration for | SANE |
| Paper # | SANE2009-95 |
| Volume (vol) | vol.109 |
| Number (no) | no.265 |
| Page | pp.73-78 |
| #Pages | 6 |
| Date of Issue | 2009-10-26 (SANE) |
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