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| Envisat-1双极化雷达数据建模及应用 | |
| 引用本文： | 李震,陈权,任鑫.Envisat-1双极化雷达数据建模及应用[J].遥感学报,2006,10(5):777-782. |
| 作者姓名： | 李震 陈权 任鑫 |
| 作者单位： | 1. 遥感科学国家重点实验室,中国科学院,遥感应用研究所,北京,100101 2. 遥感科学国家重点实验室,中国科学院,遥感应用研究所,北京,100101;中国科学院,研究生院,北京,100049 3. 中国科学院,研究生院,北京,100049;中国科学院,国家天文台,北京,100101 |
| 基金项目： | 国防科工委资助项目;国家高技术研究发展计划(863计划);中国科学院"百人计划";国家教育部留学回国人员科研启动基金;国防科工委资助项目 |
| 摘 要： | 根据欧空局Envisat-1卫星上ASAR传感器的系统参数和双极化特点，利用AIEM模型模拟，建立了裸露地表同极化后向散射模型和粗糙度参数计算模型。前者把同极化总后向散射系数表达成人射角和两个地表参数（土壤水分和粗糙度）的函数；后者给出了用双极化雷达数据计算粗糙度的方法。把这两个模型结合，用于土壤水分反演，分别用模拟数据和实测数据验证，良好的结果证明了这两个模型的可靠性和实用性。双极化后向散射模型的建立，将为以后PALSAR（日本）和RADARSAT-2（加拿大）多极化雷达数据的应用打下基础。 |
| 关 键 词： | 后向散射 土壤水分 |
| 文章编号： | 1007-4619(2006)05-0777-06 |
| 收稿时间： | 2006-03-07 |
| 修稿时间： | 2006-05-22 |
Modeling Envisat-1 Dual-Polarized Data and Its Applications |
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| LI Zhen,CHEN Quan and REN Xin.Modeling Envisat-1 Dual-Polarized Data and Its Applications[J].Journal of Remote Sensing,2006,10(5):777-782. | |
| Authors: | LI Zhen CHEN Quan and REN Xin |
| Institution: | 1. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China; 2. Graduate School of Chinese Academy of Science, Beijing 100049, China; 3. National Astronomical Observatories Cbincse Academy of Sciences, Beijing 100101, China |
| Abstract: | Bare surface co-polarized backscattering model and roughness computing model is established using AIEM simulated data,based on the configuration and dual-polarized nature of Envisat-1 ASAR data.The former expresses co-polarized backscattering coefficient as the function of incidence angle and two surface parameters(namely,soil moisture and roughness);and the later gives the method to obtain roughness using dual-polarized radar data.Soil moisture is estimated by combining the two models,and validation is performed by both simulated data and in-situ data.The results show that the two models are reliable and useful.The foundation of dual-polarized model will benefit to the modeling and applications of multi-polarized radar data on PALSAR(Japan) and RADARSAT-2(Canada) in the future. |
| Keywords: | Envisat-1 ASAR AIEM |
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