地基InSAR技术及其典型边坡监测应用

Ground-based interferometric synthetic aperture radar and its application in monitoring typical slopes

为了开展边坡活动实时监测,研究以IBIS-L地基In SAR系统为代表的地基In SAR形变时序分析关键技术,进行针对不同变形特征的观测方案和数据处理方法的优化,并开展了奉节大树场镇灾后滑坡、神农架林区人工不稳定斜坡和备战铁矿露天采矿边坡等边坡活动的监测应用,以及备战铁矿隧道南口冰川运动的监测试验。4种类型边坡地基In SAR监测结果表明,在复杂工作情况下,地基In SAR设备具有较高的观测稳定性,在满足观测条件的情况下,地基In SAR测量精度能达到亚mm级,已成为监测边坡微小形变的重要技术手段。这扩展了形变监测模式从星载In SAR技术的"大尺度、宽覆盖"走向地基In SAR技术的"小尺度、局部精细测量",进一步丰富了科研人员对边坡变形现象的动力学过程认识,为"星-地"联合In SAR技术监测地表形变过程奠定了技术基础。

In order to do real-t ime mo n ito rn g o f slope movement and study the t im eof IBIS-L GB-InSAR, the authors designed and optimized the observation schemes and data processing methods.Landslide of Dashuchang Town,unstable slope o f Shennongia forest re g io n,and open-pit slope o f Beizhan iron mine were monitored through the technology. The glac ie r in the south o f Beizhan tun nel was also exp e rm e n ta l lymeasured. The results of GB-InSAR mo n ito rn g showed that GB-SAR devices have high o b s e racomplex working condi t ions, and the accuracy o f G B - InS AR can reach su b -m i l l im e te r le vel w i th proper observa-tion conditions. GB-InSAR has become an important technique to monitor the slope dispthe displacement monitcrning mode,making i t trans fe nin g f rom ＊ la rge -s ca le,wide-coverage” satellite InS AR to “ small-scale, local ly refined measurement” GB - InS A R . There fore,i t fu r th e r e n rch e s the understanding o f slopedeformation phonomenon, and lays the technical foundation fo r44 sate llite -grou nd” combined InS AR to monitor sur-face deformation process.