为解决传统地面监测手段成本高、观测周期长等问题,时序干涉合成孔径雷达(InSAR)技术广泛应用于机场形变监测研究中,但不同单一时序InSAR 技术均存在监测缺陷。差分干涉测量短基线时序分析技术(SBAS-InSAR)技术仅适用于大范围区域监测,缺乏单个地表点分析。永久散射体合成孔径干涉测量(PS-InSAR)技术过度依赖相干性,局限于线性形变。为解决单一化监测手段所存在的问题,采用双模式驱动时序InSAR(DMTS-InSAR)技术对机场形变进行分析。基于21 景Sentinel-1A 升轨雷达影像,以天津滨海国际机场局部区域为研究区,对DMTS-InSAR 技术的监测结果进行评估,克服了单一技术分析的局限性。评估后发现滨海国际机场局部区域存在沉降现象,其中机场停机坪处的形变最为显著,最大垂直沉降速率达到25 mm/ a。结果表明,利用DMTS-InSAR 技术监测机场形变,可获取更为准确可靠的形变结果。

In order to solve the problems of high cost and long observation period of traditional ground subsidence methods, time-series InSAR technology is widely used in airport deformation monitoring research. But there are monitoring defects in different single time-series InSAR techniques. SBAS-InSAR technique is only suitable for large-scale area monitoring, and lacks the analysis of a single surface point. PS-InSAR techniques is overly dependent on coherence and limited to linear deformation. To overcome the limitations of single-technique analysis, DMTS-InSAR technique is used to analyze the airport deformation in this paper. In this paper, 21 ascending radar images from Sentinel-1A were utilized, with a focus on the local area of Tianjin Binhai International Airport as the study region. The evaluation of monitoring results obtained through the DMTS-InSAR technique aimed to address the limitations inherent in single-technique analyses. The experimental results indicate that there are scattered local subsidence areas at Tianjin Binhai International Airport. Among them, the deformation at the airport apron is the most significant, with a maximum vertical subsidence rate of 25 mm/ a. The findings suggest that utilizing DMTS-InSAR techniques for monitoring airport ground deformation can yield more accurate and reliable deformation results

TN957. 52;TN959. 6

中央高校基本科研业务费资助项目( 3122025073)