| 基于SBAS-InSAR技术的延安新城地表形变特征 |
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| 引用本文： | 张艺,丁晓光.基于SBAS-InSAR技术的延安新城地表形变特征[J].地震地磁观测与研究,2020,41(5):75-82. |
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| 作者姓名： | 张艺 丁晓光 |
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| 作者单位： | 中国西安 710068 陕西省地震局 |
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| 基金项目： | 陕西省地震局启航与创新基金（项目编号：QC201712）；陕西省“十三五”重点项目兴平市活断层探测与地震危险性评价项目 |
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| 摘 要： | 延安GNSS基准站2015-2017年出现异常变化，在32幅哨兵-1雷达影像基础上，利用小基线集合成孔径雷达干涉测量（SBAS-InSAR）技术，对延安新城2014年10月-2017年2月地表形变进行监测，提取时间序列与平均地表形变速率。结果表明：GNSS基准站的异常形变可能与延安新城土方回填相关，地表形变时间序列沿顺时针的变化趋势与延安新城的扩张方向基本一致。与传统GNSS异常核实方法相比，SBAS-InSAR技术可快速确定异常范围和量值大小。通过高精度地表形变时间序列，能够辅助查找异常发生原因，有利于推进防灾减灾工作。
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| 关 键 词： | 小基线集（SBAS） 地形变监测 时间序列 异常核实 |
Surface deformation characteristics in the Yan'an new city extracted by SBAS-InSAR |
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| ZHANG Yi,DING Xiaoguang.Surface deformation characteristics in the Yan'an new city extracted by SBAS-InSAR[J].Seismological and Geomagnetic Observation and Research,2020,41(5):75-82. |
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| Authors: | ZHANG Yi DING Xiaoguang |
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| Institution: | Shaanxi Earthquake Agency, Xi'an 710068, China |
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| Abstract: | The observation at Yan'an GNSS base station shows abnormal changes from 2015 to 2017. On the basis of 32 Sentinel-1 SAR images, the time series of deformation and surface deformation rate in Yan'an new city from October 2014 to February 2017 were obtained by the SBAS-InSAR technique. The results show that the abnormal deformation observed by the GNSS base station may be related to the stress caused by earthwork backfilling, and the variation trend of the time series of surface deformation along clockwise is basically consistent with the expanding direction of Yan'an new city. Compared with traditional GNSS anomaly verification methods, the SBASInSAR technique can quickly determine the scope and magnitude of the anomaly. The observation and analysis of the high-precision surface deformation time series can assist in finding the cause of anomalies, which is conducive to promote the smooth progress of disaster prevention and mitigation work in Shaanxi Province. |
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| Keywords: | SBAS-InSAR surface deformation monitoring the time series anomaly verification |
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