高分辨率SAR影像在地面沉降监测中的应用
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摘要
TerraSAR-X具有较高的地面分辨率、短波长以及高时间分辨率,为高精度地面沉降的监测提供了更大的契机。选取2011-12～2013-05的38景TerraSAR-X影像,采用PS-InSAR技术对常州武进区地面沉降状况进行监测,提取更多的PS点,获取了2011～2013年的地表形变速率,沉降细节更加丰富;同时对沉降的原因进行研究和分析,最后利用外部水准数据对其监测结果进行对比和验证,精度较高(达到了4.2 mm/a)。
TerraSAR-X owns high ground resolution, short wavelength and high time resolution, which can provide a better opportunity for high precision land subsidence monitoring. In this paper, we selected 38 TerraSAR-X images from December 2011 to May 2013, and used PS-InSAR technology to monitor the grand subsidence of Wujin District. Then, we extracted more PS points to obtain deformation rate from 2011 to 2013, with more abundant settlement details. Finally, we compared and validated the monitoring results by the external leveling measurement data. The results have high accuracy(4.2 mm/y).
TerraSAR-X owns high ground resolution, short wavelength and high time resolution, which can provide a better opportunity for high precision land subsidence monitoring. In this paper, we selected 38 TerraSAR-X images from December 2011 to May 2013, and used PS-InSAR technology to monitor the grand subsidence of Wujin District. Then, we extracted more PS points to obtain deformation rate from 2011 to 2013, with more abundant settlement details. Finally, we compared and validated the monitoring results by the external leveling measurement data. The results have high accuracy(4.2 mm/y).
引文
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[2]孙张涛,范景辉,王如意,等.基于高分辨率SAR数据的地面沉降监测[J].地质通报,2015,34(10):1 910-1 917
[3]傅文学,田庆久,郭小方,等.PS技术及其在地表形变监测中的应用现状与发展[J].地球科学进展,2006,21(11):1 193-1 198
[4]陈强,刘国祥,丁晓利,等.永久散射体雷达差分干涉应用于区域地表沉降探测[J].地球物理学报,2007,50(3):737-743
[5]Ferretti A,Prati C,Rocca F.Permanent Scatterers in SARInterferometry.IEEE Transactions on Geocinece and Remote Sensing,2001,39(1):8-19
[6]谢友鹏,曹黎云,徐良.常州市地面沉降及监测[J].城市勘探,2009,26(6):103-105
[7]周朝栋,宫辉力,张全有,等.北京平原区地面沉降PS-InSAR监测(J).遥感信息,2017,32(1):17-22