Envisat-1双极化雷达数据建模及应用

李震; 陈权; 任鑫

doi:10.11834/jrs.200605115

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专辑

Envisat-1双极化雷达数据建模及应用
Modeling Envisat-1 Dual-Polarized Data and Its Applications
2006年第5期页码：777-782
纸质出版：2006
DOI： 10.11834/jrs.200605115
稿件说明：

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[1]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(05):777-782. DOI： 10.11834/jrs.200605115.

LI Zhen~1, CHEN Quan~. Modeling Envisat-1 Dual-Polarized Data and Its Applications[J]. Journal of Remote Sensing, 2006, (5): 777-782. DOI： 10.11834/jrs.200605115.

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入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。

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.