论文部分内容阅读
通过对合成孔径雷达干涉测量的去相干分析,提出了基于短基线集(SBAS)技术进行地表形变监测的方法。该方法能够克服DIn SAR易受时间、基线去相干等因素的影响,通过对短时-空基线组合的影像对进行干涉处理以提取高相干点,利用大气延时相位与相位噪声在频域不同特性以达到二者分离的目的,最终获取监测区域长时间缓慢地表形变的演变规律。本文利用2007—2011年16景南京地区ALOS数据进行了短基线差分干涉试验,并通过实测水准数据进行了对比,结果表明该技术能够较准确地反演出地表的形变场及累积形变量。
A method of surface deformation monitoring based on Short Baseline Set (SBAS) technique is proposed through the analysis of the coherence of synthetic aperture radar interferometry. The method can overcome the influence of DIn SAR susceptibility time and baseline de-coherence and so on. The method can obtain the high coherence point by interfering with the image pair of the short-time base-line combination, and use the atmospheric delay phase and the phase noise to be different in the frequency domain Characteristics in order to achieve the purpose of separation between the two, and finally obtain the evolution of long-term surface deformation of the monitoring area. In this paper, a short baseline differential interference experiment was conducted using ALOS data of 16 scenes from 2007 to 2011 in Nanjing, and compared with the measured data. The results show that this technique can accurately predict the deformation field and the cumulative deformation of the ground surface.