GNSS-Reflectometry: Forest canopies polarization scattering properties and modeling
文献类型：期刊论文
| 作者 | Wu, Xuerui1,2,3,4 ; Jin, Shuanggen1
|
| 刊名 | ADVANCES IN SPACE RESEARCH
 |
| 出版日期 | 2014-09-01 |
| 卷号 | 54期号:5页码:863-870 |
| 关键词 | GNSS-R Forest canopy Scattering Polarization Specular |
| 英文摘要 | Nowadays, GNSS-Reflectometry (GNSS-R) can be a new promising remote sensing tool in the ocean, snow/ice and land surfaces, e.g., vegetation biomass monitoring. Although GNSS-R provides a potentially special L-band multi-angular and multi-polarization measurement, the theoretical vegetation scattering properties and mechanisms for GNSS-R are not understood clearly. In this paper, the GNSS-R vegetation polarization scattering properties are studied and modeled at different incidence angles (specular direction). The bistatic scattering model Bi-mimics is employed, which is the first-order radiative transfer equation. As a kind of forest stand, the Aspen's crown layer is composed of entire leaves, and its parameters in Mimics handbook are used as model input. The specular circular polarizations (co-polarization RR and cross-polarization LR) are simulated. For cross-polarization, the received polarization is assumed as a linear (horizontal and vertical) polarizations and +/- 45 degrees linear polarizations. Therefore, the HR VR, +45R and -45R polarizations are simulated here. Contributions from different scattering components at RR, LR and VR polarization are also presented. For co-polarization, it is large in the whole specular angles (10-80 degrees). The scattering trends of the other cross polarization (HR, LR, +45R and -45R) are a little similar when compared to the RR and RV. Therefore, the RHCP and V polarizations are more favorable to collect the reflected signals. The trunk heights and crown depths do not affect the scattering trends of RR, RV and RL, while the trunk height has some effect on the scattering amplitude of different polarizations. The azimuth angle has more effects on RR, RL and RV scattering, especially in lower than 50 degrees. The observation angles and polarization combinations are extremely important for GNSS-R remote sensing, (C) 2014 COSPAR. Published by Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
| 研究领域[WOS] | Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences |
| 关键词[WOS] | OCEAN |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000341219200007 |
| 源URL | [http://119.78.226.72/handle/331011/16286]  |
| 专题 | 上海天文台_天文地球动力学研究中心 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chifeng Coll, Dept Environm Resources & Management, Chifeng 024000, Peoples R China 3.Chinese Acad Sci, Inst Remote Sensing Applicat, State Key Lab Remote Sensing Sci, Beijing 100859, Peoples R China 4.Beijing Normal Univ, Beijing 100859, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Xuerui,Jin, Shuanggen. GNSS-Reflectometry: Forest canopies polarization scattering properties and modeling[J]. ADVANCES IN SPACE RESEARCH,2014,54(5):863-870. |
| APA | Wu, Xuerui,&Jin, Shuanggen.(2014).GNSS-Reflectometry: Forest canopies polarization scattering properties and modeling.ADVANCES IN SPACE RESEARCH,54(5),863-870. |
| MLA | Wu, Xuerui,et al."GNSS-Reflectometry: Forest canopies polarization scattering properties and modeling".ADVANCES IN SPACE RESEARCH 54.5(2014):863-870. |
入库方式： OAI收割
来源：上海天文台
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