测绘通报 ›› 2017, Vol. 0 ›› Issue (4): 93-97.doi: 10.13474/j.cnki.11-2246.2017.0128

• 技术交流 • 上一篇    下一篇

利用Sentinel-1数据和SBAS-InSAR技术监测西安地表沉降

张艳梅, 王萍, 罗想, 张荞, 陈慧   

  1. 国家测绘地理信息局第三航测遥感院, 四川 成都 610100
  • 收稿日期:2016-09-02 修回日期:2017-01-18 出版日期:2017-04-25 发布日期:2017-05-05
  • 作者简介:张艳梅(1986—),女,硕士,工程师,主要从事雷达数据处理与变化监测等研究工作.E-mail:469719634@qq.com
  • 基金资助:
    测绘新技术系统开发与示范应用(2016KJ0100);微小型全极化SAR测图系统及其应急监测应用(201412002)

Monitoring Xi'an Land Subsidence Using Sentinel-1 Images and SBAS-InSAR Technology

ZHANG Yanmei, WANG Ping, LUO Xiang, ZHANG Qiao, CHEN Hui   

  1. The Third Institute of Photogrammetry and Remote Sensing, National Administration of Surveying, Mapping and Geoinformation, Chengdu 610100, China
  • Received:2016-09-02 Revised:2017-01-18 Online:2017-04-25 Published:2017-05-05

摘要: 哨兵一号(Sentinel-1)数据是目前现势性较好的免费SAR数据,且因其6天的重访周期,非常适合InSAR地表形变监测。本文以西安市城区及周边为研究区,开展基于多期Sentinel-1数据和短基线集干涉(SBAS-InSAR)技术的时序地表沉降监测方法的探索,研究形成了详细的数据处理流程,利用已有研究资料佐证了方法的有效性。监测表明:2015—2016年,绝大部分区域地表形变速率位于[-33~30]mm/a区间内,228d监测期内累积沉降量最大约75mm,发生在目前西安最大沉降中心鱼化寨;相比20世纪末,沉降强度大幅减弱,沉降严重区域由西安市东郊向南郊转移,且沉降范围减小。

关键词: 哨兵一号, 小基线集技术, 地表沉降, 西安市

Abstract: The Sentinel-1 data is currently the latest free SAR data and is well suited for land subsidence monitoring based on InSAR technology due to its 6-day revisit cycle. In this paper, Xi'an urban area and its surrounding area are used as the research area, and the time-series surface subsidence monitoring method based on Sentinel-1 data and SBAS-InSAR technique is explored. We obtain a detailed data processing process, which validity is corroborated by using the existing research data. The research shows that most of the regional surface deformation rate is in the range of-33 to 30mm/a from 2015 to 2016, and the maximum subsidence is about 75mm in the 228-day monitoring period, occurred in Yu-Hua Zhai that is the largest settlement center of Xi'an. Compared with the late 20th century, the intensity of subsidence decreased greatly, and the serious area of subsidence moved form the eastern suburbs to the southern suburbs of Xi'an, and the range of subsidence reduced.

Key words: Sentinel-1, SBAS-InSAR, land subsidence, Xi'an

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