| Presentation | 2019-11-01 Depolarization of Scattering From a Spatially Anisotropic Rough Surface With Inhomogeneous Dielectric Profile Ying Yang, Guofei Shang, Kun-Shan Chen, Zhao-Liang Li, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Abstract Depolarized response is an inherent feature of electromagnetic (EM) waves providing the physical interpretation from radar observations of natural surface, which is inclined to be spatially anisotropic and inhomogeneous. This paper presents depolarized scattering from natural surfaces, in which the inhomogeneity is modeled by dielectric profiles. The spatial anisotropy is statistically described by directional correlation function. The advanced integral equation method (AIEM) is used to simulate the scattering coefficient. Numerical results show that the linearly polarized scattering reveals stronger directional dependence, and the circularly polarized scattering tends to be more omnidirectional and its scattering pattern resembles ?concentric circles? around the specular direction. In virtue of dielectric inhomogeneity, the HH polarized scattering pattern exhibits a stronger angular dependence than the VV does. Quantitatively, the VV polarization is smaller than the HH polarization near the specular direction, but elsewhere, it is notably larger than HH. The HV and VH scattering coefficients cluster in the cross plane when scattering angle is small. For circular polarization, LR polarized scattering is smaller than RR polarization. The depolarized scattering patterns from the inhomogeneous rough surfaces with different dielectric profiles are similar at linearly polarized incidence, but are quite different at right-hand circular polarization (RHCP) incidence. That is, for different inhomogeneous surface structures, polarization conversion is less efficient at linearly polarized incidence than at circularly polarized incidence. Moreover, as the polarization state of the incident wave changes, the depolarized scattering characteristics varies correspondingly. For vertically polarized incidence, the depolarized scattering is greater in backward region with larger scattering angle, and is stronger at cross plane but with smaller scattering angle. For horizontally polarized incidence, the depolarized scattering is stronger in backward region. Numerical results confirms that the anisotropy and inhomogeneity of the surface effectively prompt the polarization conversion. The depolarized mechanism is potentially useful to predict and interpret the scattering behaviors from the natural soil surface, where the strong anisotropy commonly presents because of plowing and the dielectric inhomogeneity. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Depolarization / anisotropy / inhomogeneous / scattering / rough surface |
| Paper # | SANE2019-69 |
| Date of Issue | 2019-10-24 (SANE) |
| Conference Information | |
| Committee | SANE |
|---|---|
| Conference Date | 2019/10/31(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | KOREA (Jeju) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | ICSANE2019 |
| Chair | Akitsugu Nadai(NICT) |
| Vice Chair | Hiroyoshi Yamada(Niigata Univ.) / Makoto Tanaka(Tokai Univ.) |
| Secretary | Hiroyoshi Yamada(Univ. of Electro-Comm.) / Makoto Tanaka(Mitsubishi Electric) |
| Assistant | Ryo Natsuaki(Univ. of Tokyo) / Masato Yamanashi(Mitsubishi Space Software) / Shunichi Futatsumori(ENRI) |
| Paper Information | |
| Registration To | Technical Committee on Space, Aeronautical and Navigational Electronics |
|---|---|
| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Depolarization of Scattering From a Spatially Anisotropic Rough Surface With Inhomogeneous Dielectric Profile |
| Sub Title (in English) | |
| Keyword(1) | Depolarization |
| Keyword(2) | anisotropy |
| Keyword(3) | inhomogeneous |
| Keyword(4) | scattering |
| Keyword(5) | rough surface |
| 1st Author's Name | Ying Yang |
| 1st Author's Affiliation | Guilin University of Technology(GLUT) |
| 2nd Author's Name | Guofei Shang |
| 2nd Author's Affiliation | Hebei GEO University(Hebei GEO Univ.) |
| 3rd Author's Name | Kun-Shan Chen |
| 3rd Author's Affiliation | Hebei GEO University(Hebei GEO Univ.) |
| 4th Author's Name | Zhao-Liang Li |
| 4th Author's Affiliation | Hebei GEO University(Hebei GEO Univ.) |
| Date | 2019-11-01 |
| Paper # | SANE2019-69 |
| Volume (vol) | vol.119 |
| Number (no) | SANE-255 |
| Page | pp.pp.107-111(SANE), |
| #Pages | 5 |
| Date of Issue | 2019-10-24 (SANE) |