陆地探测一号SAR卫星星座在地震行业的应用与展望  

Application of Lutan-1 SAR Satellite Constellation to Earthquake Industry and Its Prospect

作　　者：李永生 李强 焦其松 姜文亮 李兵权 张景发 罗毅 LI Yongsheng;LI Qiang;JIAO Qisong;JIANG Wenliang;LI Bingquan;ZHANG Jingfa;LUO Yi(National Institute of Natural Hazards,Ministry of Emergency Management of China,Beijing 100085,China;School of Automation,China University of Geoscience(Wuhan),Wuhan 430074,China)

机构地区：[1]应急管理部国家自然灾害防治研究院,北京100085 [2]中国地质大学(武汉)自动化学院,湖北武汉430074

出　　处：《武汉大学学报（信息科学版）》2024年第10期1741-1752,共12页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金(42374039);国家重点研发计划(2021YFC3001903);民用航天技术预先研究项目(D040405);阿里巴巴创新研究项目(24024696-CRAQ717HZ11230008)。

摘　　要：陆探一号(Lutan-1,LT-1)合成孔径雷达(synthetic aperture radar,SAR)卫星是中国第一组民用L波段SAR干涉(interferometric SAR,InSAR)卫星星座,该星座以地表形变差分干涉测量模式为主,兼具干涉测高和全极化成像功能。其双星编队的成像模式可以实现4 d的严格重访周期,非常有利于地震等自然灾害的地表变形监测和应急响应。综合分析LT-1 SAR卫星的成像能力以及地震行业应用需求,重点阐述在轨测试阶段该组卫星系统在地震行业的初步应用,以中国四川省泸定地震、土耳其地震、中国甘肃省积石山地震等为例,详细阐述其在地震同震变形监测、地震次生灾害应急评估以及活动断裂解译和活动断层遥感探查的实际应用。结果显示,通过与同期其他SAR卫星干涉结果及全球导航卫星系统变形结果对比,验证了LT-1卫星地震同震变形结果在监测精度、时空分辨率上都具有较大优势。利用LT-1SAR卫星影像高分辨率的优势,快速获取地震滑坡分布以及精确绘制震区的道路通达性产品,可有效支撑地震应急和灾害评估工作。得益于搭载L波段传感器,雷达波穿透能力相对较强。因此,LT-1卫星具备较强的隐伏断层探测能力。对LT-1卫星星座在地震行业应用中广度和深度进行讨论,对目前存在的问题进行阐述,为后续地震业务化应用提供参考。Objectives Lutan-1(LT-1),as the first constellation of civil L-band interferometric synthetic aperture radar(InSAR)satellites in China,primarily focuses on surface deformation measurement by leveraging the differential interferometric,while also possessing height measurement and fully polarimetric imaging capabilities.With its dual-satellite formation imaging mode,it can achieve a strict revisit period of four days,which is highly beneficial for surface deformation monitoring and emergency response to natural disasters such as earthquakes.From the perspective of the LT-1 SAR satellite's imaging capabilities and the demands of the seismic industry,we primarily highlight the preliminary applications of the satellite system during the testing phase.The main objective is to evaluate the satellite data's capabilities in co-seismic deformation monitoring,emergency observations,and remote sensing interpretation of active fault zones.The ultimate purpose is to provide a reference for the future commercialization of seismic applications,based on the potential applications of the satellite data in these fields.Methods Taking the examples of the 2022 Luding earthquake in Sichuan Province,China,the 2023 Turkey earthquake,and the Jishishan earthquake in Gansu Province,China,coseismic deformation monitoring will be conducted.The deformation maps will be assessed in terms of accuracy and monitoring capabilities.Additionally,emergency assessments of secondary earthquake hazards and remote sensing investigations of active fault zones will be carried out based on the high-resolution SAR data from the LT-1 satellite.Results By comparing the co-seismic deformation results derived from LT-1 satellites with the results from concurrent other SAR satellites and global navigation satellite system(GNSS)measurements,it has been verified that the LT-1 satellite has significant advantages in terms of monitoring accuracy and spatiotemporal resolution.In addition,leveraging the high-resolution advantage of LT-1 SAR satellite imagery,it is poss

关 键 词：陆地探测一号 INSAR 地震应急 同震变形 断裂解译 

分 类 号：P237[天文地球—摄影测量与遥感]