ENVISAT ScanSAR干涉数据处理研究

摘要

ScanSAR干涉测量是一种三维测高模式,而且ScanSAR模式也是SAR卫星的一种工作模式,且具有宽覆盖、大范围和重返周期短的优点.本文结合ScanSAR的工作原理及特点,分析了ScanSAR的成像算法,针对ScanSAR的数据处理的关键点,提出了采用分字条带处理的方法来剔除轨道误差,消弱拼接、大地水准面差距、大气效应的误差.在此基础上,使用GAMMA软件给出处理流程,然后通过对ENVISAT卫星的青藏高原宽幅数据的处理,进行实验对比,证明该方法的有效性,并为ScanSAR干涉测量的进一步研究提供了重要的科学参考.%Interferometry with ScanSAR is a three-dimensional measurement technique,and ScanSAR mode is also one of the SAR satellite mode.It has the advantages of large coverage,large range and short time interval.In this paper,the imaging algorithms of ScanSAR are analyzed combined with the working principle and characteristics of the ScanSAR.Aiming to the key points of the data processing of the ScanSAR,this paper proposes a sub-swaths processing method to eliminate orbit errors and to mitigate errors of strip mosaicking,geoid undulation and atmosphere effects.Based on these,with the use of the GAMMA software this paper puts forward the data processing and then by processing ENVISAT WSS data of Qinghai-Tibet Plateau makes contrast experiments to prove the feasibility of the method.For the further study of Interferometry with ScanSAR,this paper provides important scientific reference.