| Presentation | 2018-11-08 L-band bistatic radar returns from bare soils: a simulation study for soil moisture retrieval using global sensitivity analysis method Jiangyuan Zeng, Kun-Shan Chen, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, an attempt is made to identify the optimal bistatic configurations for the retrieval of bare soil moisture at L-band based on a global sensitivity analysis using the extended Fourier amplitude sensitivity test (EFAST) algorithm. For this purpose, we apply the Advanced Integral Equation Model (AIEM), which is a well-established theoretical scattering model, to simulate complete sets of bistatic scattering coefficients, over a wide range of surface roughness and dielectric parameters. The sensitivities of radar response to soil moisture and surface roughness are identified and quantified in terms of bistatic geometries and radar parameters. The results show that the autocorrelation functions (ACFs), which significantly affect the distribution of sensitivity indices of surface roughness, do not exert distinct effects on the bistatic sensitivity pattern of soil moisture. In bistatic scattering, VV polarization shows higher sensitivity to soil moisture than HH polarization, particularly at large incident angles. As incident angle increases, in cases of small azimuth scattering angles and large scattering angles, the sensitivity zone expands and tends to move to the forward region at VV polarization. This feature persists regardless of the ACFs, and thus offers promising configurations for soil moisture retrieval. For HH polarization, in contrast, the sensitivity zone gradually moves to the backward region as the incident angle increases. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | bistatic scattering / radar configuration / soil moisture / surface roughness / global sensitivity analysis |
| Paper # | SANE2018-57 |
| 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) | L-band bistatic radar returns from bare soils: a simulation study for soil moisture retrieval using global sensitivity analysis method |
| Sub Title (in English) | |
| Keyword(1) | bistatic scattering |
| Keyword(2) | radar configuration |
| Keyword(3) | soil moisture |
| Keyword(4) | surface roughness |
| Keyword(5) | global sensitivity analysis |
| 1st Author's Name | Jiangyuan Zeng |
| 1st Author's Affiliation | Institute of Remote Sensing and Digital Earth/CAS(RADI/CAS) |
| 2nd Author's Name | Kun-Shan Chen |
| 2nd Author's Affiliation | Institute of Remote Sensing and Digital Earth/CAS(RADI/CAS) |
| Date | 2018-11-08 |
| Paper # | SANE2018-57 |
| Volume (vol) | vol.118 |
| Number (no) | SANE-287 |
| Page | pp.pp.11-16(SANE), |
| #Pages | 6 |
| Date of Issue | 2018-11-01 (SANE) |