雪地环境电磁散射特性研究  

Studies on the EM Scattering from the Earth Surface Covered with Snow

作　　者：王童[1] 童创明[1,2] 姬伟杰[1] 彭鹏[1] 

机构地区：[1]空军工程大学防空反导学院,西安710051 [2]中国人民解放军93995部队,西安710306

出　　处：《科学技术与工程》2014年第10期220-223,230,共5页Science Technology and Engineering

基　　金：国家自然科学基金(61372033);陕西省自然科学基金计划项目(2011JM8025)资助

摘　　要：针对雪地环境电磁散射的特殊性、复杂性,建立土壤与雪层相对介电常数模型,分析频率和湿度对土壤和雪层有效相对介电常数的影响。以高斯分层粗糙面模拟有雪层覆盖的土壤表面,基于考虑层间多次散射的微扰法(small perturbation method,SPM)定量计算土壤层的相对介电常数、粗糙度,雪层的厚度对雪地环境后向电磁散射的影响,并结合土壤与雪层相对介电常数模型分析对雪层和土壤层相关信息获取的可行性。研究结果为雪层厚度、融化速度以及雪层下地形地貌的探测提供了理论依据。Soil＇ s and snow＇ s dielectric constant models are established to analyze the effect of the frequency and humidity. The layered Gauss rough surface is used to simulate the soil covered with snow. And the effect on the snow environment from the dielectric constant and roughness of the soil layer and the thickness of the snow layer is calculated and analyzed based on the small perturbation method. The feasibility of obtaining the information of the snow layer and soil layer is analyzed combining the soil＇ s and snow＇ s dielectric constant models. The result from the study provides theory reference for the detection of snow layer＇ s thickness, melting rate and the soil relief under the snow layer.

关 键 词：介电常数 分层粗糙面 微扰法 

分 类 号：TN011[电子电信—物理电子学]