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| 講演名 | 2018-11-08 13:50 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（RADI/CAS）  SANE2018-57 |
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| 抄録 | （和） | 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. |
| （英） | 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. | |
| キーワード | （和） | bistatic scattering / radar configuration / soil moisture / surface roughness / global sensitivity analysis / / / |
| （英） | bistatic scattering / radar configuration / soil moisture / surface roughness / global sensitivity analysis / / / | |
| 文献情報 | 信学技報, vol. 118, no. 287, SANE2018-57, pp. 11-16, 2018年11月. | |
| 資料番号 | SANE2018-57 | |
| 発行日 | 2018-11-01 (SANE) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| 著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します．(許諾番号：10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| PDFダウンロード | SANE2018-57 |
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| 研究会情報 | |
| 研究会 | SANE |
| 開催期間 | 2018-11-07 - 2018-11-09 |
| 開催地（和） | 中国（許昌市） |
| 開催地（英） | China (Xuchang) |
| テーマ（和） | ICSANE2018 |
| テーマ（英） | ICSANE2018 |
| 講演論文情報の詳細 | |
| 申込み研究会 | SANE |
| 会議コード | 2018-11-SANE |
| 本文の言語 | 英語 |
| タイトル（和） | |
| サブタイトル（和） | |
| タイトル（英） | L-band bistatic radar returns from bare soils: a simulation study for soil moisture retrieval using global sensitivity analysis method |
| サブタイトル（英） | |
| キーワード(1)（和/英） | bistatic scattering / bistatic scattering |
| キーワード(2)（和/英） | radar configuration / radar configuration |
| キーワード(3)（和/英） | soil moisture / soil moisture |
| キーワード(4)（和/英） | surface roughness / surface roughness |
| キーワード(5)（和/英） | global sensitivity analysis / global sensitivity analysis |
| キーワード(6)（和/英） | / |
| キーワード(7)（和/英） | / |
| キーワード(8)（和/英） | / |
| 第1著者 氏名（和/英/ヨミ） | Jiangyuan Zeng / Jiangyuan Zeng / |
| 第1著者 所属（和/英） | Institute of Remote Sensing and Digital Earth/中国科学院 (略称： 中国科学院) Institute of Remote Sensing and Digital Earth/CAS (略称： RADI/CAS) |
| 第2著者 氏名（和/英/ヨミ） | Kun-Shan Chen / Kun-Shan Chen / |
| 第2著者 所属（和/英） | Institute of Remote Sensing and Digital Earth/中国科学院 (略称： 中国科学院) Institute of Remote Sensing and Digital Earth/CAS (略称： RADI/CAS) |
| 講演者 | 第1著者 |
| 発表日時 | 2018-11-08 13:50:00 |
| 発表時間 | 20分 |
| 申込先研究会 | SANE |
| 資料番号 | SANE2018-57 |
| 巻番号（vol） | vol.118 |
| 号番号（no） | no.287 |
| ページ範囲 | pp.11-16 |
| ページ数 | 6 |
| 発行日 | 2018-11-01 (SANE) |
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