复杂观测环境下GB-SAR的气象扰动分析及改正

Analysis and correction of meteorological disturbances in complex observation environments by GB-SAR

针对GB-SAR技术采用零空间基线连续监测滑坡、桥梁、矿区、大坝等多种类型的目标物形变时,受观测环境中的气象扰动和噪声影响,大气效应引起的干涉相位变化有时远大于目标形变相位,为有效削弱气象扰动对干涉相位的影响,准确获取监测目标高精度的形变信息,该文首先介绍了常用的GB-SAR大气改正方法,利用实验数据对复杂观测环境下的GB-SAR干涉相位受气象扰动影响特征进行了统计分析,并提出一种改进的气象扰动改正方法,最后通过实测数据验证了该方法的有效性。

When GB-SAR technology adopts zero-space baseline to continuously monitor the deformation of landslides,bridges,mining areas,dams and other types of objects,the interference phase change caused by atmospheric effect is sometimes much larger than that caused by the target deformation phase.In order to obtained accurate deformation of monitoring target information accurately,it needs to weaken the influence of meteorological disturbance on the interference phase effectively.In this paper,the commonly used meteorological correction method of GB-SAR was firstly introduced,and the statistical analysis of the characteristics of GB-SAR interference phase affected by meteorological disturbances in the complex observation environment was carried out with experimental data.An improved meteorological correction method was proposed,and the effectiveness of this method was verified.