资源简介

摘要： 从永久散射体(PS,Persistent Scatterer)和分布式目标(DS,Distributed Scatterer)机理出发,以四川都江堰世界文化遗产地为例,利用2008~2010年的23幅ENVISAT ASAR图像提取了PS候选点和DS候选区;选取4个样本研究两者时空分布模式,并结合阴影叠掩图和土地分类图对所提取的相干目标进行了分析。实验结果表明,使用振幅离散度阈值法提取的PS候选点总体表现为高相干,主要分布在城区,且在水体和叠掩区有少量分布;设定了提取DS候选区的识别原则提取DS候选区,并确定相干系数数据集最佳的计算窗口大小为7×35。DS候选点主要分布在裸露地表和耕地等区域,其相干性在时间序列上抖动,揭示了人类活动和季节变换对其的影响。利用PS和DS时空分布模式及特性,可有效实现两者相干目标的区分与辨识。 关键词： PS(Persistent Scatterer);  DS(Distributed Scatterer);  相干;  阴影叠掩;  地表分类     Abstract: In Dujiangyan world cultural heritage site,Sichuan province,dealing with 23 ENVISAT ASAR images observing in 2008~2010,the Persistent Scatterer(PS)and Distributed Scatterer(DS)candidates are extracted respectively by means of scattering and coherence mechanisms.Four samples were selected to study the spatial-temporal pattern of PS and DS.The difference between PS and DS is further investigated synergistically using the layover/shadow and land cover images.Experimental results show that PS candidates extracted by means of the amplitude that are high coherent and primarily distributed in urban regions;furthermore,a small amount of PS candidates are distributed in water bodies.According to the recognition criteria applied in this paper,DS candidates are extracted together with the optimal window size(7×35)for the coherence image generation.DS candidates are mainly distributed in bare surface and cultivated lands.Which are affected by human activities and seasonal changes,demonstrating coherence vibration in time series.The study of PS and DS with regard to space-temporal distribution pattern and DS with regard to space-temporal distribution pattern and characteristics provides clues for their discrimination as well as identification.

相关资源

1. 水质遥感监测的关键要素叶绿素a的反演算法研究进展
2. 基于无人机遥感技术的森林参数获取研究进展
3. 基于无线传感器网络的森林生态系统观测试验平台构建
4. 基于无人机激光雷达的森林冠层高度分析
5. 多源时序国产卫星影像的森林火灾动态监测
6. 基于无人机遥感技术的台风灾害倒伏绿化树木检测

下载说明

·如果您发现该资源不能下载，请通知管理员.gissky@gmail.com

·为确保下载的资源能正常使用，请使用[WinRAR v3.8]或以上版本解压本站资源,缺省解压密码www.gissky.net ，如果是压缩文件为分卷多文件，请依次下载每一个文件，并按照顺序命名为1.rar,2.rar,3.rar...，然后鼠标右击1.rar解压.

·为了保证您快速的下载速度，我们推荐您使用[网际快车]等专业工具下载.

·站内提供的资源纯属学习交流之用,如侵犯您的版权请与我们联系.