极化干涉SAR对小麦的回波响应机理研究

项目名称： 极化干涉SAR对小麦的回波响应机理研究

项目编号： No.61461044

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 张成

作者单位： 宁夏大学

项目金额： 46万元

中文摘要： 本项目以农作物- - 小麦为研究对象，研究极化干涉SAR对小麦回波响应。首先在小麦植株三维结构建模的基础上，依据平均场近似原理、SAR成像和散射相互作用机制，开展小麦极化相干散射机理研究，并通过高效并行的极化干涉SAR回波信号生成，完成全极化干涉数据获取。经过相干成像和极化干涉处理，研究并得到小麦的极化特性和相关特性；从而建立小麦的生物物理参数与极化干涉SAR观测量之间的数值关系，为小麦生物物理参数的微波遥感定量反演奠定基础。尝试解决微波定量遥感过程中，利用观测值完成生物量反演的核心- - 建立解析物理模型十分困难的问题；为我国极化干涉SAR微波遥感设备系统研制提供依据。

中文关键词： 合成孔径雷达；小麦；极化干涉；相干模拟；8通道

英文摘要： The crops-wheat was taken as the object of investigation in the project. During the investigation, 8-channel and coherent electromagnetic Polari metric interferometer SAR wheat echo response of the simulation scattering modeling and SAR imaging modeling techniques as well as parallel and efficient Polari metric interferometer SAR echo signal generation technology were used. By establishing imaging Model wheat, electromagnetic scattering and SAR(Synthetic Aperture Radar) , based on the mean field approximation theory , SAR imaging geometry and the scattering interacting mechanism, a coherent 8-channel SAR image simulation software was carried out. Polarization characteristic and correlation property of wheat can be deduced by analyzing the polarization response of SAR image and interferometric SAR coherence , consequently the numerical relationship of wheat biophysical parameters and polarimetric interferometry SAR observations are built, which lays the foundation for microwave remote sensing quantitative retrieval of wheat biophysical parameters. In the process of attempting to solve the microwave quantitative remote sensing，observations are used to complete the core of biomass retrieval, the core which is a very difficult problem in establishing analytical physical model and basis will be provided for the development of polarimetric interferometric SAR microwave remote sensing equipment system.

英文关键词： Synthetic Aperture Radar(SAR);Wheat;Polarimetric;Coherrent Simulation;8 channels