全极化GNSS-R陆面参数延迟多普勒图模型

doi:10.11947/j.AGCS.2018.20180321

测绘学报 ›› 2018, Vol. 47 ›› Issue (S0): 101-108.doi: 10.11947/j.AGCS.2018.20180321

全极化GNSS-R陆面参数延迟多普勒图模型

吴学睿^1,2,3, 金双根^1,2,3

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

收稿日期:2018-07-03 修回日期:2018-09-18 出版日期:2018-12-31 发布日期:2019-05-18
作者简介:吴学睿(1981-),女,博士,副研究员,研究方向为GNSS-R遥感原理及应用。E-mail:xrwu@shao.ac.cn
基金资助:
国家自然科学基金青年基金（41501384）；国家重点研发计划（2017YFB0502800；2017YFB0502802）；赤峰学院院士专家工作站项目（cfxyys201710）

Theoretical DDM Modeling of GNSS-R Fully Polarization Land Surface Geophysical Parameters

WU Xuerui^1,2,3, JIN Shuanggen^1,2,3

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

Received:2018-07-03 Revised:2018-09-18 Online:2018-12-31 Published:2019-05-18
Supported by:
Natural Science Foundation of China (NSFC) (No. 41501384);The National Key R & D Program of China (Nos.2017YFB0502800;2017YFB0502802);The Academician Workstation Foundation in Chifeng (No. cfxyys201710)

摘要/Abstract

摘要： 目前，针对GNSS-R的研究多从观测角度出发，对其散射机理研究相对较少。本文针对GNSS-R（GNSS-reflectometry）反射信号陆面参数的延迟多普勒图理论模型展开研究，对于陆面参数（裸土、植被）的双站散射特性的计算采用修改后的随机粗糙面散射模型和零阶/一阶辐射传输方程模型。通过该模型模拟分析了裸土、植被参数变化时，相应的延迟多普勒图的变化。同时为利用极化信息进行相应地物参数地后向反演，模型中增加全极化计算功能。全极化GNSS+R陆面参数延迟多普勒图理论模型的研究有助于星载数据的解释、地表试验设计、数据仿真和后向反演算法的开发。

关键词: GNSS-R, 延迟多普勒图, 裸土, 植被, 极化

Abstract: At present, most of the existing research are based on the experimental observations, few theoretical studies have been carried out.This paper has developed a fully polarization GNSS-R delay Doppler map for land geophysical parameters study. This theoretical model was based on the ocean surface GPS scattering model. After the modifications, it has been used for the land surface. As for the calculations of land geophysical parameters (bare soil and vegetation), random surface scattering model and the first order radiation transfer equation model were used. Effects of bare soil and vegetation parameters on the delay Doppler maps were simulated. In order to use the polarization information for backward inversion, our developed theoretical model has the ability of fully polarizations calculations, i.e. RR, LR, HR and VR pol. This theoretical model is a mechanism tool for the data explanation of space borne mission, experimental campaign design, data simulations and the backward inversion algorithm development.

Key words: GNSS-R, delay-doppler map, bare soil, vegetation, polarization

中图分类号:

P237

吴学睿, 金双根. 全极化GNSS-R陆面参数延迟多普勒图模型[J]. 测绘学报, 2018, 47(S0): 101-108.

WU Xuerui, JIN Shuanggen. Theoretical DDM Modeling of GNSS-R Fully Polarization Land Surface Geophysical Parameters[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(S0): 101-108.

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全极化GNSS-R陆面参数延迟多普勒图模型

Theoretical DDM Modeling of GNSS-R Fully Polarization Land Surface Geophysical Parameters

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