| Presentation | 2018-11-09 Investigation of the effect of bispectrum on scattering from non-Gaussian sea surface Dengfeng Xie, Kun-Shan Chen, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The upwind-downwind asymmetry in normalized radar backscattering cross section (NRBCS) from ocean surface is well-known; one acceptable and convincing reasoning is explained by the fact that the surface height distribution deviates from Gaussian one, which causes a non-zero skewness function, and consequently affects the radar cross section in up and down wind directions. Specific forms of skewness function, in between Gaussian and exponential, have been proposed in previous studies to account for the up/downwind asymmetry in radar backscatter. Attempt is made, through numerical simulation, in this paper to examine the impact of these two types of skewness functions on NRBCS. The simulated NBRCSs, with and without skewness contributions, are compared with measured data in upwind and downwind directions at L-, C-, and Ku-bands for different wind speeds. The results indicate that the Gaussian-type skewness function works better to account for the up/downwind asymmetry of NBRCS by choosing an appropriate root mean square (RMS) height appearing in skewness function and as the wind speed or radar frequency increases, the RMS height increases but regardless of wind direction and radar incidence angle. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Non-Gaussian sea surface / sea spectra / skewness functions / bispectrum / upwind-downwind asymmetry of radar backscattering |
| Paper # | SANE2018-85 |
| Date of Issue | 2018-11-01 (SANE) |
| Conference Information | |
| Committee | SANE |
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| Conference Date | 2018/11/7(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | China (Xuchang) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | ICSANE2018 |
| Chair | Sonosuke Fukushima(ENRI) |
| Vice Chair | Toshifumi Moriyama(Nagasaki Univ.) / Akitsugu Nadai(NICT) |
| Secretary | Toshifumi Moriyama(ENRI) / Akitsugu Nadai(Univ. of Electro-Comm.) |
| Assistant | Ryo Natsuaki(Univ. of Tokyo) / Masato Yamanashi(Mitsubishi Space Software) / Takeshi Amishima(Mitsubishi Electric) |
| Paper Information | |
| Registration To | Technical Committee on Space, Aeronautical and Navigational Electronics |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Investigation of the effect of bispectrum on scattering from non-Gaussian sea surface |
| Sub Title (in English) | |
| Keyword(1) | Non-Gaussian sea surface |
| Keyword(2) | sea spectra |
| Keyword(3) | skewness functions |
| Keyword(4) | bispectrum |
| Keyword(5) | upwind-downwind asymmetry of radar backscattering |
| 1st Author's Name | Dengfeng Xie |
| 1st Author's Affiliation | Institute of Remote Sensing and Digital Earth/CAS/UCAS/CHN(RADI/CAS/UCAS/CHN) |
| 2nd Author's Name | Kun-Shan Chen |
| 2nd Author's Affiliation | Institute of Remote Sensing and Digital Earth/CAS/CHN(RADI/CAS/CHN) |
| Date | 2018-11-09 |
| Paper # | SANE2018-85 |
| Volume (vol) | vol.118 |
| Number (no) | SANE-287 |
| Page | pp.pp.147-152(SANE), |
| #Pages | 6 |
| Date of Issue | 2018-11-01 (SANE) |