升降轨Sentinel-1A数据在高山峡谷区地质灾害监测中的适用性研究  

Study on the Applicability of Ascending and Descending Orbit Sentinel-1A Data in Geological Hazard Monitoring in High Mountainous Canyon Areas

作　　者：陈跨越 王保云 王婷[3] CHEN Kuayue;WANG Baoyun;WANG Ting(School of Mathematics,Yunnan Normal University,Kunming,Yunnan,China 650500;Yunnan Key Laboratory of Modern Analytical Mathematics and Applications,Kunming,Yunnan,China 650500;School of Foreign Languages&Literature,Yunnan Normal University,Kunming,Yunnan,China 650500)

机构地区：[1]云南师范大学数学学院,云南昆明650500 [2]云南师范大学云南省现代分析数学及应用重点实验室,云南昆明650500 [3]云南师范大学外国语学院,云南昆明650500

出　　处：《昆明学院学报》2024年第6期120-128,共9页Journal of Kunming University

基　　金：国家自然科学基金项目(61966040).

摘　　要：针对利用InSAR技术对高山峡谷区进行地质灾害监测时难以恰当选用升降轨Sentinel-1A数据问题,采用SBAS-InSAR技术,并结合坡度和坡向数据解算出研究区垂直坡面向和沿坡向的形变值,研究不同坡向的坡体在地质灾害形变监测中升降轨Sentinel-1A数据源的适用性情况.结果表明:1)Sentinel-1A升轨数据更适用于监测北坡和东坡的形变信息,降轨数据更适用于监测南坡和西坡的形变信息;2)北坡的沿坡向形变速率要大于垂直坡面向形变速率,南坡的沿坡向形变速率与垂直坡面向形变速率相差不大,东坡的垂直坡面向形变速率比沿坡向形变速率大,西坡的垂直坡面向和沿坡向均有较大形变.因此,结合升降轨数据,可以解决单一轨道对某些区域或特定角度下监测结果不够准确的问题,可以获得更全面、更准确的形变信息.In response to the difficulty in selecting the appropriate ascending or descending orbit Sentinel-1A data for geological hazard monitoring in high mountainous canyon areas using InSAR technology,this article uses SBAS-InSAR technology and combines slope and aspect data to calculate the deformation values of the vertical slope direction and along the slope direction in the study area.The applicability of the lifting rail Sentinel-1A data source for different slope directions in geological hazard deformation monitoring is studied.The results indicate that:1)Sentinel-1A ascending orbit data are more suitable for monitoring deformation information on north-facing and east-facing slopes,while descending orbit data are more suitable for monitoring deformation information on south-facing and west-facing slopes.2)Deformation rates along the slope are greater than vertical slope deformation rates on north-facing slopes;the difference between along-slope and vertical slope deformation rates is not significant on south-facing slopes;vertical slope deformation rates are greater than along-slope deformation rates on east-facing slopes;both vertical and along-slope deformations are significant on west-facing slopes.Therefore,combining ascending and descending orbit data can address the issue of insufficient accuracy of monitoring results for certain areas or specific angles using a single orbit,and can provide more comprehensive and accurate deformation information.

关 键 词：小基线集合成孔径雷达干涉测量 Sentinel-1A数据源 二维形变分解 形变监测 地质灾害 

分 类 号：P237[天文地球—摄影测量与遥感]