Sentinel-1A数据矿区地表形变监测适用性分析

Applicability analysis of ground deformation monitoring in mining area by Sentinel-1A data

针对合成孔径雷达干涉测量(interferometric synthetic aperture Radar,InSAR)技术监测矿区地表形变中形变位置确定、形变梯度估计和相干性之间的关系,利用Sentinel-1A数据开展InSAR技术矿区地表形变监测适用性研究,分析干涉图相干性、形变位置识别和形变梯度之间的响应关系。以河南省焦作市某矿区为研究区,实验结果表明,在暖温带半湿润季风气候条件下,裸地和村落地表类型全年保持较高相干性,目视识别可以有效确定矿区的形变位置,受村落周边农田的影响,部分形变范围无法准确确定,通过形变梯度函数模型验证形变梯度也在可检测的范围;农田覆盖类型夏季在卫星最短重访周期内,目视识别可以有效确定矿区的形变区域和范围,但受噪声影响条纹模糊,通过形变梯度函数模型验证形变梯度位于可检测最小形变梯度上;采用真实水准数据验证了村落地物类别模型的适用性。

According to the relationship between the deformation position determination,the deformation gradient estimation and the coherence of the InSAR monitoring surface deformation in the mining area,the Sentinel-1A data were used to study the applicability of the InSAR technique in the monitoring of the mining area.The experimental results show that the surface type of bare land and village is maintained at high coherence throughout the year under the condition of semi - humid monsoon climate in the warm and temperate zone in Henan Province.Visual identification can effectively determine the deformation position of the mining area.The deformation range can not be accurately determined by the deformation gradient function model.The deformation gradient is also within the range of the detectable range.The field coverage type can effectively determine the deformation of the mine in summer.In addition,the deformation gradient is located on the detectable minimum deformation gradient by using the deformation gradient function model.Furthermore,the applicability of the model is proved by the leveling data.