李广宇

• 1:中国铁路设计集团有限公司测绘地理信息研究院

摘要(Abstract)：

国产陆探一号(LT-1)以高分辨率、长波段特点在地灾监测领域的优势凸显。为分析验证常态化运行后的LT-1在铁路时序干涉合成孔径雷达(InSAR)地灾形变监测中的工程应用能力以及地形精度对其影响，聚焦某铁路勘察选线需求，获取2023年9月至2025年4月的17景LT-1、46景Sentinel-1A、航飞Lidar、影像以及航天飞机雷达地形测绘任务数据(SRTM),将点云数字地表模型(DSM)融入InSAR方法，融合多源数据制作时空实景三维专题成果，在相位相关性和一致性、形变速率时空分布一致性、地形变化方面，统计分析LT-1卫星的干涉和形变监测能力，对比分析地形精度对形变监测预警的影响以及地灾形变成因。研究结果表明：LT-1时空基线阈值可分别为170 d和500 m,相位相关系数最小为0.49,闭合差为-0.71～0.83 rad,具有可靠干涉质量；LT-1可监测的最大形变量为311 mm/a,在大梯度形变和小范围沉降区的探测上具有优势；借助点云DSM的形变监测结果在地形变化或者大梯度形变更可靠，沉降区成因主要是煤矿开采或山体滑移。融合国产LT-1卫星和高精度高现势性DSM等多源数据的铁路时序InSAR地灾监测分析方法，在实际工程项目中成功应用，为复杂区域铁路天空地一体化勘测和外部环境安全监测预警提供了可用数据和方法。

关键词(KeyWords)： 陆探一号卫星;点云;多源融合;相干性;外部环境;地灾;监测预警

Abstract:

Keywords:

基金项目(Foundation): 四川省重大科技专项(2024ZDZX0008)

作者(Author): 李广宇

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