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宽幅InSAR技术在过去10多年已在全球数字高程模型生成与大尺度地壳变形监测等领域起到了重要作用.本文的主要内容包括:(1)概述了宽幅InSAR的基本流程与约束条件;(2)利用宽幅InSAR方法得到了巴姆地震、汶川地震、于田地震、改则地震以及位于板块边缘东非裂谷火山活动形变场;(3)定量分析了Envisat ASAR宽幅与条带模式数据的入射角与方位角变化对InSAR地表形变观测的影响;(4)讨论了该技术的研究热点与亟待解决的问题.近期发射的C波段Sentinel-1与L波段ALOS-2PALSAR传感器具有较短重访周期及优化的轨道控制,可以提高植被和季节性雪覆盖的火山与活动断裂带区域的相干性,将有助于利用宽幅InSAR资料开展上述地区的大尺度、快速地壳形变场监测.
The wide-ranging InSAR technology has played an important role in the fields of global digital elevation model generation and large-scale crustal deformation monitoring in the past 10 years and so on.The main contents of this paper include: (1) The basic flow and constraints of wide InSAR are summarized; ( 2) The Bam earthquake, Wenchuan earthquake, Yutian earthquake, Gaize earthquake and the active deformation field of the East African Rift Valley volcano located at the plate edge have been obtained by using the wide InSAR method. (3) Envisat ASAR data of the wide-band and the band-pattern (4) The research hotspot and the urgent problems to be solved are discussed.The Sentinel-1 and L-band ALOS-2PALSAR sensors recently launched have shorter weight Interviews and optimized orbit control can improve the coherence between vegetation and seasonal snow-covered volcanoes and active fault zones, which will help to carry out large-scale and rapid crustal deformation monitoring in the above-mentioned areas using wide InSAR data.