基于GCP方法的地基In SAR大气扰动误差改正分析

Atmospheric Disturbance Error Correction in GB-In SAR Based on Ground Control Point

大气扰动误差作为地基InSAR测量中的一个重要误差源,其引起的干扰不可忽视。本文以滑坡监测区域为研究对象,基于IBIS-L系统获取到的监测区数据,根据热信噪比、估计信噪比、空间相关系数和相位稳定性等特性,选取监测区域内稳定的GCP对观测目标中的大气扰动误差进行改正。实验结果表明,GCP方法能有效削弱地基In SAR测量中的大气扰动影响,提高观测的精度。

Atmospheric disturbance error is one of the major factors in ground-based interferometric synthetic aperture rader （GB- InSAR）, and the interference caused by it can′t be ignored. In this paper, the monitoring area of the landslide is taken as the researchobject, according to the characteristics of the thermal signal to noise ratio, the estimation of the signal to noise ratio, the spatial coherence and the phase stability in the data obtained from the monitoring area based on the IBIS-L system, stable GCPs in the monitoringarea are selected to correct the atmospheric disturbance error. Experimental results demonstrate that the correction algorithm basedGCP can effectively weaken the influence of atmospheric disturbance error and improve the accuracy of observation in ground-basedinterferometric synthetic aperture rader.