北京航空航天大学学报 ›› 2020, Vol. 46 ›› Issue (10): 1883-1889.doi: 10.13700/j.bh.1001-5965.2019.0553

• 论文 • 上一篇    下一篇

基于GNSS-R的裸土圆极化散射特性研究

吴学睿1,2,3,4, 欧阳馨秋5, 王芳6, 马文骁1,2,3   

  1. 1. 中国科学院上海天文台, 上海 200030;
    2. 上海市空间导航与定位技术重点实验室, 上海 200030;
    3. 中国科学院行星科学重点实验室, 上海 200030;
    4. 赤峰学院 资源环境与建筑工程学院, 赤峰 024000;
    5. 中山大学 地理科学与规划学院, 广州 510275;
    6. 中国交通通信信息中心, 北京 100011
  • 收稿日期:2019-10-23 发布日期:2020-10-29
  • 通讯作者: 王芳 E-mail:wangfang@cttic.cn
  • 作者简介:吴学睿 女,博士,副研究员。主要研究方向:GNSS-R遥感原理及应用;王芳 女,博士,副教授。主要研究方向:微波遥感散射模型机理及应用。
  • 基金资助:
    国家自然科学基金(41501384)

Bare soil circular polarization scattering properties for GNSS-R applications

WU Xuerui1,2,3,4, OUYANG Xinqiu5, WANG Fang6, MA Wenxiao1,2,3   

  1. 1. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;
    2. Key Laboratory of Space Navigation and Position Technology, Shanghai 200030, China;
    3. Key Laboratory of Planetary Sciences, Chinese Academy of Sciences, Shanghai 200030, China;
    4. School of Resources, Environment and Architectural Engineering, Chifeng University, Chifeng 024000, China;
    5. School of Geograghy and Planning, Sun Yat-Sen University, Guangzhou 510275, China;
    6. China Transport Telecommunications&Information Center, Beijing 100011, China
  • Received:2019-10-23 Published:2020-10-29
  • Supported by:
    National Natural Science Foundation of China (41501384)

摘要: GNSS-R是利用导航卫星的反射信号对地物参数进行遥感的新兴对地观测方式。针对其特有的圆极化散射方式,以双站散射的高级积分方程模型为工具,利用极化合成的方法将随机粗糙地表面圆极化散射模型转换为可以计算各种极化的微波散射模型。重点模拟分析了不同土壤水分含量下,裸土在不同观测几何时的圆极化散射特性。随机粗糙地表面圆极化散射模型的发展在某种程度上填补了GNSS-R领域机理模型的空缺,为后续土壤水分的进一步反演提供了机理工具。

关键词: GNSS-R, 土壤水分, 极化, 随机粗糙面散射模型, 观测几何

Abstract: GNSS-R is a new way of earth observation that uses the reflected signals of navigation satellites to remotely sense the geophysical parameters. Its unique feature is the circular polarization scattering. This paper employs the advanced integral equation model of bistatic scattering as a tool, and uses polarization synthesis to convert the random rough surface scattering model into a microwave scattering model that can calculate various polarizations. Simulation and analysis of the circular polarization scattering characteristics of bare soil under different observation geometries and different soil moisture contents are carried out. To some extent, the development of the random rough surface circular polarization scattering model fills the gap in the GNSS-R mechanism, and provides a tool for the subsequent further inversion of soil moisture.

Key words: GNSS-R, soil moisture, polarization, random rough surface scattering model, observation geometry

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