地基SAR在滑坡形变监测中的应用

地基InSAR是近年发展起来的基于地基SAR(GB-SAR)获取地表形变的一种新的技术手段，分辨率高、可实时监测，实现毫米级形变监测精度，为近距离滑坡实时监测与预警提供了先进的技术手段。本文首先以澜沧江某滑坡体为研究对象，在滑坡体对岸设立固定站点，按固定频率进行GB-SAR数据采集；然后通过先后两景影像形成干涉对，利用相干阈值方法提取相干点目标；最后利用形变模型提取滑坡体形变结果。研究表明，地基SAR可获得整个滑体形变边界、形变大小空间分布及时间变化历程，对滑坡体灾害实时监测非常有效，可为滑坡灾害监测及预警提供参考。

Application of ground SAR in landslide deformation monitoring

Ground based InSAR is a new technical means developed in recent years to mesure surface deformation based on ground-based SAR (GB-SAR). It has high resolution, and can monitor in real time, and achieve millimeter deformation monitoring accuracy. It provides an advanced technical means for real-time monitoring and early warning of short-range landslide. This paper takes a landslide in Lancang River as the study object, a fixed station is set up on the opposite bank of the landslide to collect GB-SAR data according to the fixed frequency. The interferogram pair is formed by two images successively, then the high coherent point target is extracted by the coherent threshold method, and finally the deformation result of landslide is extracted by the deformation model. The research shows that the GB-SAR is able to obtain the whole deformation boundary, spatial distribution and time change process of the landslide, which is very effective for real-time monitoring of landslide disaster. The relevant research of this paper can provide references for landslide disaster monitoring and early warning.