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2022年1月8日青海门源6.9级地震InSAR同震形变场（图）
青海门源 6.9级地震 InSAR同震形变场
2023/1/16
北京时间2022年1月8日01时45分，青海海北洲门源县发生6.9级地震，震中位于N 37.77°，E 101.26°，震源深度10km。通过差分干涉测量（D-InSAR）方法处理哨兵1号（Sentinel-1）卫星影像，干涉雷达（InSAR）初步结果显示此次地震为走滑地震，降轨最大形变量约为70cm。
低轨卫星编队的精密轨道和基线确定是分布式InSAR卫星系统完成科学任务的重要前提。目前，基于GNSS数据的缩减动力学绝对和相对轨道确定是获得高精度轨道和基线产品的主要手段。本文利用天绘二号编队星载GPS实测数据，采用缩减动力学定轨方法进行编队卫星绝对和相对定轨研究。GPS数据质量分析表明，A星与B星接收机的信号跟踪能力和数据质量基本相当。通过对轨道机动进行常值加速度建模，可以有效消除机动对天绘二号...
多时相InSAR技术具有探测大范围毫米级地表形变的能力，已被广泛应用于地面沉降监测。近几年，应用多时相InSAR技术监测以高铁为代表的大尺度人造线状地物形变备受关注。本文将C波段SAR数据用于高铁沿线路基形变监测，应用相位稳定性分析和改进的StaMPS技术来增加相干性点的密度和形变参数解算的稳定性。采用研究区时间跨度为21个月的47景Sentinel-1A数据，对连（云港）盐（城）高铁及其沿线区域...
随着不同成像参数SAR卫星不断发射升空以及新 的I nSAR技术不断出现,同一地区可以获取多尺度、多 源、异 质 的I nSAR地 表 形 变 监 测 数 据.将 这 些 多 源 I nSAR地表形变监测数据作为观测量,实际三维地表形 变作为未知参数,建立模型并解算,实现东西、南北和垂 直向地表形变监测,为地质灾害预报及监测提供更全面 的基础资料.本文以I nSAR三维地表形变解算为核心研 究内容...
在全球变暖的背景下,高亚洲山地冰川受印度洋季风 和西风带的气候影响,大部分冰川出现了不同程度的消融 和退缩.同时,高亚洲作为除极地冰盖以外全球第二大的 冰川聚集地,是长江、怒江等亚洲７条河流的重要水源,被 称为“亚洲水塔”,养育世界１/３的人口,对区域内水资源、 水循环、气候与环境等有重要影响.然而,由于该区域地 形复杂、海拔较高等原因,只有少量的冰川具有实地观测 资料,难以开展大范围、高分辨率、...
一种新的桥梁区域时序InSAR相位解缠方法
时间序列InSAR 桥梁形变检测 相位解缠 二分图匹配
2019/4/18
时间序列InSAR技术是一种空间遥感技术，可用于获取基础设施的高精度微小形变信息，相比传统测量手段，该技术有较多优点，在桥梁形变检测方面有广阔的应用前景。但现有的时间序列InSAR技术中的相位解缠算法在大型斜拉桥形变检测上存在较大解缠误差，导致目前该技术还难以获取正确的斜拉桥形变结果。提出一种新的时间序列InSAR相位解缠算法。通过构建约束三角网络，对残差点进行分块，利用二分图最优权匹配方法获取最...
联合升、降轨Sentinel-1A卫星的差分干涉数据反演2017年8月8日四川九寨沟MS7.0地震的断层滑动分布。首先对SAR复数干涉像对进行"二通"差分干涉处理，获取了覆盖震区的多视向InSAR同震形变场；然后利用四叉树和均匀采样法分别进行近、远场数据降采样，在此基础上，利用弹性半空间矩形位错模型，反演发震断层的几何参数和最优滑动分布。结果显示：①InSAR干涉条纹呈蝶状分布，最大LOS向沉降和...
DETECTION OF FOREST DISTURBANCE USING TANDEM-X POL-INSAR COHERENCE
Pol-InSAR coherence TanDEM-X Forest disturbance
2019/2/27
This current study shows the potential of TanDEM-X pol-InSAR coherence to identify progressive selective logging of Teak plantation in Uttarakhand, India. Pol-InSAR data were acquired over four months...
ATMOSPHERIC PHASE DELAY CORRECTION OF D-INSAR BASED ON SENTINEL-1A
Atmospheric Phase Sentinel-1A, D-InSAR Tropospheric Delay Maps GACOS Subsidence Monitoring Yellow River Delta
2018/5/14
In this paper, we used the Generic Atmospheric Correction Online Service for InSAR (GACOS) tropospheric delay maps to correct the atmospheric phase delay of the differential interferometric synthetic ...
EVALUATION OF AIRBORNE L- BAND MULTI-BASELINE POL-INSAR FOR DEM EXTRACTION BENEATH FOREST CANOPY
Digital Elevation Model, SAR, Multi-baseline Pol-InSAR, TomoSAR, Forest canopy, Scattering characteristics separation
2018/5/14
DEM beneath forest canopy is difficult to extract with optical stereo pairs, InSAR and Pol-InSAR techniques. Tomographic SAR (TomoSAR) based on different penetration and view angles could reflect vert...
GROUND SUBSIDENCE ALONG SHANGHAI METRO LINE 6 BY PS-InSAR METHOD
Ground subsidence Shanghai Metro Line 6 PS-InSAR COSMO-SkyMed Envisat ASAR
2018/5/15
With the rapid development of urban economy, convenient, safe, and efficient urban rail transit has become the preferred method for people to travel. In order to ensure the safety and sustainable deve...
APPLICATION OF INSAR TECHNOLOGY IN GEOGRAPHICAL SITUATION MONITORING
InSAR Geographical situation monitoring D-InSAR The terrain Deformation Interference figure Application
2018/5/15
In this paper, based on the geographical situation monitoring project of the earthquake zone of ludian county, zhaotong city, yunnan province,using the data of the radarsat-2 satellite (time frame is ...
THE TRANSMISSION CHANNEL TOWER IDENTIFICATION AND LANDSLIDE DISASTER MONITORING BASED ON INSAR
Transmission Channel Transmission Tower Identification InSAR Time Series D-InSAR Landslide Monitoring
2018/5/14
The transmission distance of transmission lines is long, the line affected by the diversity of climate and topography of the corridors of transmission lines, differences in regional geological structu...
ANALYSIS OF LAND SUBSIDENCE MONITORING IN MINING AREA WITH TIME-SERIES INSAR TECHNOLOGY
Time-series InSAR Land Subsidence ALOS PALSAR RADARSAT-2
2018/5/15
Time-series InSAR technology has become a popular land subsidence monitoring method in recent years, because of its advantages such as high accuracy, wide area, low expenditure, intensive monitoring p...
INSAR UNWRAPPING ERROR CORRECTION BASED ON QUASI-ACCURATE DETECTION OF GROSS ERRORS (QUAD)
QUAD, InSAR, Unwrapping Error Correction, Gross Error, L1-norm
2018/5/14
Unwrapping error is a common error in the InSAR processing, which will seriously degrade the accuracy of the monitoring results. Based on a gross error correction method, Quasi-accurate detection (QUA...