POT技术矿区形变监测仿真与适用性分析  

Simulation and Applicability Analysis of POT Technology for Monitoring Mine Deformation

作　　者：刘肖兵 常云浩 LIU Xiaobing;CHANG Yunhao(Information Engineering University,Zhengzhou 450001,China;Henan College of Surveying and Mapping,Zhengzhou 451464,China)

机构地区：[1]信息工程大学,河南郑州450001 [2]河南测绘职业学院,河南郑州451464

出　　处：《测绘科学技术学报》2025年第1期42-48,共7页Journal of Geomatics Science and Technology

基　　金：河南省重点研发推广专项(202102310014);河南省高等学校重点科研项目(20A420001);河南省科技攻关项目(242102321173)。

摘　　要：像素偏移量追踪技术是矿区大量级形变监测的有效手段之一,但形变监测精度易受图像像元尺寸和互相关窗口大小影响。为了准确分析二者对POT技术矿区形变监测精度的影响机理,采用概率积分法仿真不同量级矿区形变,结合ALOS-PALSAR、Radarsat-2和TerraSAR-X卫星系统参数,生成3种不同像元尺寸的合成孔径雷达仿真影像,在不同大小的互相关窗口下对SAR仿真影像进行POT监测,与仿真形变对比分析监测精度。实验结果表明,互相关窗口过小,POT形变监测的准确性会下降;互相关窗口过大,POT形变监测的精确性会下降;互相关窗口的最优区间为[33,65];像元尺寸越小,POT形变监测的精度越高。POT(pixel offset tracking)technology is one of the effective methods for large-scale deformation monitoring in mining areas,but its accuracy is sensitive to the size of image pixel and the size of the cross-correlation window.To accurately analyze the influence mechanism of the two factors on the POT technology,the surface deformations of the mining areas with different deformation levels are simulated by using the probability integration method,and three different pixel sizes of SAR images are simulated by utilizing the surface deformations and the system parameters of ALOS-PALSAR,Radarsat-2 and TerraSAR-X satellites.The POT monitoring is performed on the simulated SAR images under cross-correlation windows of different sizes,and the monitoring accuracy is compared with the simulation deformation.Experimental results show that the accuracy of POT deformation monitoring will decrease if the cross-correlation window is too small,and the precision of POT deformation monitoring will decrease if the cross-correlation window is too large.The optimal interval of the cross-correlation window is[33,65].The smaller the pixel size of the SAR image is,the higher the accuracy of POT deformation monitoring will be.

关 键 词：合成孔径雷达 像素偏移量追踪 互相关窗口 像元尺寸 矿区形变 

分 类 号：P231[天文地球—摄影测量与遥感]