一种修正的Goldstein干涉图滤波方法  

An improved Goldstein radar interferogram filter

作　　者：王琪洁[1] 尹宏杰[1] 朱建军[1] 张晓红[1] 

机构地区：[1]中南大学信息物理工程学院测绘与国土信息工程系,长沙410083

出　　处：《工程勘察》2009年第11期51-55,共5页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金(40774003;10878026);国家863项目(2006AA12Z156);国家西部1:50000空白区测图工程2007年度研究课题;地理空间信息工程国家测绘局重点实验室开发基金(200817)资助

摘　　要：干涉图的相位噪声是相干性和视数的函数。因此,一个好的干涉图滤波器应同时考虑相干性和视数的影响。本文对在干涉图滤波中广泛应用的Goldstein滤波器进行改进,通过视数的引入,对滤波器的滤波参数进行修正,大大增强了滤波的自适应性。模拟数据和真实数据的验证说明新的滤波器在滤波效果上有明显的改善,具有更好的稳健性。Phase noise in a radar interferogram is the function of the interferometric coherence and the muhilook number of the interferogram. Therefore an optimal radar interferogram filter should incorporate the information on both the interferometric coherence and the multilook number. This paper presents a modification to the commonly used Goldstein filter by suggesting an improved determination of the filtering parameter, which incorporate the influence of interferometric look number additionally. This way will greatly enhance the adaptability of the filter. Experimental results with both the simulated data sets and the real ones show that the new filter can work quite well and very robust when it is applied to filter radar interferograms.

关 键 词：INSAR Goldstein滤波 相位滤波 相干性 视数 

分 类 号：P225.7[天文地球—大地测量学与测量工程]