| 雷达卫星影像中输电导线散射斑的相位时间序列稳定性分析 |
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| 引用本文： | 陈志国,李陶,张校志,李沙,张伟,徐侃.雷达卫星影像中输电导线散射斑的相位时间序列稳定性分析[J].测绘工程,2017,26(4). |
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| 作者姓名： | 陈志国 李陶 张校志 李沙 张伟 徐侃 |
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| 作者单位： | 武汉大学 卫星导航定位技术研究中心,湖北 武汉,430079 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 分析输电导线散射斑相位的几何关系,选取20幅时间跨度约为1年的TerraSAR条带模式影像,对其中两基铁塔之间6条输电导线形成的散射斑相位时间序列进行分析。文中统计分析构成导线散射斑像元的相位离散度,其标准差约为0.2弧度,表明单个散射斑相位稳定。选取铁塔顶部点的导线散射斑为参考点,与另外5个导线散射斑做差分相位时间序列分析,分析导线之间高程差的理论计算值与实际值的一致性。分析结果显示,导线散射斑差分相位序列的波动可达2弧度以上,与导线间高程差产生的相位不一致。
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| 关 键 词： | 高分辨率雷达 输电导线 时间序列 散射斑 相位 |
Analysis on time series phase stability of power line scatterers in SAR images |
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| CHEN Zhiguo,LI Tao,ZHANG Xiaozhi,LI Sha,ZHANG Wei,XU Kan.Analysis on time series phase stability of power line scatterers in SAR images[J].Engineering of Surveying and Mapping,2017,26(4). |
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| Authors: | CHEN Zhiguo LI Tao ZHANG Xiaozhi LI Sha ZHANG Wei XU Kan |
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| Abstract: | In this paper,20 stripe-map TerraSAR images taken in a year are chosen to analyze the 6 scatterers'phase between two power towers.The results of scatterers'phase dispersion statistics show that every single scatterer'phase is stable,and the standard deviation of scatterers'phases are about 0.2 rad.The top scatterer is selected as a reference point,and the differential phase with other 5 scatterers fluctuates beyond 2 rad.Because of the big fluctuation,the theoretical value cannot match the differential phase caused by height between towers. |
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| Keywords: | high-resolution SAR power line scatterer time series phase |
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