一种双基线极化干涉SAR的建筑物高度估计方法  

A Dual-baseline Polarimetric SAR Interferometry Method for Building Height Inversion

作　　者：李宁[1] 汪长城[1] 彭星[1] 付海强[1] 李鹏飞[1] 熊文秀 LI Ning WANG Changcheng PENG Xing FU Haiqiang LI Pengfei XIONG Wenxiu(Central South University, School of Geosciences and Info-physics, Changsha 410083, China)

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083

出　　处：《武汉大学学报（信息科学版）》2016年第10期1333-1338,共6页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金(41371335);国家973计划(2013CB733303);湖南省自然科学基金(12JJ4035)~~

摘　　要：在城区的建筑物高度估计中,散射单元内不同散射体相位中心不一致导致干涉相位混淆使得建筑物高度反演结果不精确。提出一种双基线的极化干涉合成孔径雷达(synthetic aperture radar,SAR)建筑物高度估计方法,利用两条基线的全极化干涉数据增加观测量,通过建立干涉相位之间的优化准则消除分辨单元内多散射体的相位中心混淆的问题。利用覆盖山东省泰安市的三景高分辨率全极化TerraSAR-X数据进行实验,并通过实地调查验证了实验结果。结果表明,相对于传统的单基线方法,新方法反演获得的建筑物高度的精度更高。In the building height inversion of urban area,as the phase center of different scatterers within a resolution cell will cause the ambiguity in the interferometric phase,compromising the accuracy of building height inversion To solve this problem,this paper proposes a dual-baseline PolInSAR building height inversion method.We use dual-baseline PolInSAR data to addobservations.Then,we use optimal criteria for removing the phase ambiguity within a resolution cell.To validate the proposed method,we selected three sets of high-resolution TerraSAR-X data covering Tai＇an City,Shandong for experiments and compared the experimental results with ground truth data.The inversion accuracy of the proposed method was improved over the results obtained from the traditional single baseline method.

关 键 词：建筑物高度 双基线 ESPRIT 极化干涉合成孔径雷达 

分 类 号：P237[天文地球—摄影测量与遥感]