基于多极化冰雷达探测技术的冰晶组构识别方法研究

项目名称： 基于多极化冰雷达探测技术的冰晶组构识别方法研究

项目编号： No.40874060

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 无线电电子学、电信技术

项目作者： 王帮兵

作者单位： 浙江大学

项目金额： 37万元

中文摘要： 南极冰盖在全球气候系统中扮演着重要角色，理解其冰流机制和动力过程对于解释冰盖过去、现在和未来的变化规律非常重要。在冰介质的所有物理特性中，冰晶组构特性对冰盖流动性影响最大，因此对于冰盖中冰晶组构分布特征和分布规律的了解和掌握具有重要的科学意义。本项目希望探索出直接从多极化冰雷达数据中提取、识别出与冰晶组构相关信息的方法，这对于应用冰雷达技术调查南极冰盖这一巨大冰雪体中冰晶组构的空间分布和变化特征具有重要意义和实用价值。本项目首先根据前人实验测定的各种冰晶组构类型的介电常数值建立对应的各向异性介电常数张量模型；通过理论推导开发出针对方位各向异性冰介质的正演模拟公式并计算各种模型的雷达响应，然后总结出冰晶组构类型的识别方法；同时针对多极化冰雷达的天线类型进行理论正演计算，最后总结出多极化冰雷达数据处理和解释方法并应用于南极冰盖研究。

中文关键词： 冰晶组构；识别技术；多极化冰雷达；各向异性

英文摘要： The Antarctic ice sheet plays an important role in the global climate system. It's important that we understand the mechanism of ice flow and the dynamical course for explaining the change rule of ice sheet in the past and in present and in the future. Among all the physical characteristic of ice, the effect of the crystal orientation of fabric (COF) affect ice flow most greatly. Therefore it has great significance of understanding the distributing of COF in ice sheet. In this project, we wish to develop a method to distrill and identify the message, which correlate with COF, from the multi-polarization plane Radio Echo Sounding (RES). It has great practical meaning of applying the RES method to investigating the space distributing and changing characteristic of COF in the huge ice mass, the Antarctic ice sheet. Firstly, we will design some tensor models of anisotropy permittivity according to the COF type that the former measured, and we will deduce the theoretically simulating formula aimed at orientation anisotropy medium. Then, the method of identifing the type of COF will be summarized. At the same time, we will carry out the simulation on the antenna type of multi-polarization plane RES. Finnally, we wish to obtain the method of data processing and interpreting for multi-polarization plane RES, and apply it to the study of Antarctic ice sheet.

英文关键词： Crystal Orientation of Fabric （COF）;Identifying technology;Multi-polarization plane Radio Echo Sounding;Anisotropy