搜索结果: 1-15 共查到“知识库 大地测量学 InSAR”相关记录16条 . 查询时间(0.131 秒)
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...
A METHOD OF GENERATING DEM FROM DSM BASED ON AIRBORNE INSAR DATA
InSAR DSM Adaptive Threshold Segmentation DEM, Filtering
2018/5/15
Traditional methods of terrestrial survey to acquire DEM cannot meet the requirement of acquiring large quantities of data in real time, but the DSM can be quickly obtained by using the dual antenna s...
PRECURSORY SLOPE DEFORMATION AROUND LANDSLIDE AREA DETECTED BY INSAR THROUGHOUT JAPAN
InSAR landslide precursory slope deformation field survey
2016/7/5
Interferometric Synthetic Aperture Radar (InSAR) technique is able to detect a slope deformation around landslide (e.g., Singhroy et al., 2004; Une et al., 2008; Riedel and Walther, 2008; Sato et al.,...
ANALYSING POST-SEISMIC DEFORMATION OF IZMIT EARTHQUAKE WITH INSAR,GNSS AND COULOMB STRESS MODELLING
InSAR GNSS Coulomb stress changes North Anatolian Fault (NAF) Izmit earthquake deformation co-seismic
2016/7/4
On August 17th 1999, a Mw 7.4 earthquake struck the city of Izmit in the north-west of Turkey. This event was one of the most devastating earthquakes of the twentieth century. The epicentre of the Izm...
Using InSAR for Seismotectonic Observations the Mw 6.0 Parkfield Earthquake, 2004, California
SAR Geodesy Earthquakes Hazards Surveying
2015/12/18
Across an earthquake cycle stress builds up along faults. The understanding of how stress builds up and when and where it is released is crucial in the understanding of the earthquake cycle. Remote se...
SEMANTIC INTERPRETATION OF INSAR ESTIMATES USING OPTICAL IMAGES WITH APPLICATION TO URBAN INFRASTRUCTURE MONITORING
optical InSAR fusion semantic classification InSAR SAR railway monitoring bridge monitoring
2015/9/21
Synthetic aperture radar interferometry (InSAR) has been an established method for long term large area monitoring. Since the launch of meter-resolution spaceborne SAR sensors, the InSAR community has...
Three Dimensional Deformation of Mining Area Detection by InSAR and Probability Integral Model
D-InSAR deformation monitoring probability integral method genetic algorithm land subsidence
2015/7/27
A new solution algorithm that combined D-InSAR and probability integral method was proposed to generate the three dimensional deformation in mining area. The details are as follows: according to the g...
A Comparison of Forest Canopy Models Derived from LiDAR and InSAR Data in a Pacific NorthWest Conifer Forest
Forestry LIDAR SAR photogrammetry interferometer comparison DEM/DTM
2015/5/26
Active remote sensing technologies, including interferometric radar (InSAR) and airborne laser scanning (LIDAR) have the potential
to provide accurate information relating to three-dimensional fores...
Iterative Building Reconstruction from Multi-Aspect InSAR Data
SAR Building Detection Reconstruction Urban Simulation Fusion
2015/5/26
Iterative Building Reconstruction from Multi-Aspect InSAR Data.
冻土的冻结和融化的反复交替会造成地质环境与结构的破坏,从而导致房屋和道路等地面工程建筑物的地基破裂或者塌陷,还会引起山体滑坡、洪水暴发以及冰川移动等.因此,监测冻土形变对确保冻土区工程建筑的稳定性和安全性,同时保证冻土区社会经济可持续发展具有重要的意义.目前,在冻土监测方面并没有能大面积监测冻土形变时间演化情况的有效方法,本文提出将InSAR技术中的小基线集方法(SBAS-InSAR)应用于监测冻...
InSAR技术在监测形变中的干涉条件分析
D-InSAR技术 形变监测 干涉约束 传感器参数
2013/11/1
针对InSAR技术在形变监测领域中的应用,本文从分析D-InSAR的干涉机理对其约束条件出发,重点研究空间去相关和形变梯度这两个关键指标对形变信息提取的影响.研究针对不同系统参数的传感器来展开,并论证这两个因素对干涉测量的限制.本文的创新性工作主要集中在以下几个方面: (1)分析了各传感器参数下的临界坡度范围,进而确立了SAR传感器监测的无信息区域;(2)证明了在植被覆盖区,相干性分解必须考虑体散...
基于时间序列的InSAR相干性量级估计
合成孔径雷达干涉测量(InSAR) 相干性估计 假设检验 条纹率估计
2013/11/1
本文提出了一种适用于InSAR数据处理的自适应相干性量级估计方法,该方法能够满足复信号随机平稳的假设前提,并兼顾运算效率与估计精度.此方法生成的相干图具有很好的分布特征,避免了影像空间分辨率的损失.提出的算法分为两个步骤:(1)根据地物后向散射特性,对时间序列SAR影像进行聚类分析,选择具有同分布的样本,保证SAR影像质地平稳条件;(2)对干涉图进行条纹频率估计,采用极大似然(ML)条纹频率估计方...
联合高精度的GPS水平位移观测和高密度的PS-InSAR雷达视线位移测量,实现地表三维形变的精确反演.本文在准确计算卫星轨道方位角基础上,使用GPS观测位移与星载雷达LOS方向形变的投影转换模型,将雷达LOS方向形变转换为垂直方向位移,并基于地面GPS与SAR影像PS目标联合构建形变监测网,采用参数平差算法估计区域地表形变场.以地质构造活动极其活跃的台湾岛及其西南屏东高雄地区为例,联合屏东地区48...
InSAR可检测的最大最小变形梯度的函数模型研究
合成孔径雷达干涉测量 Bam地震 形变梯度 相干性 视数 Envisat ASAR传感器
2013/11/7
InSAR干涉图中的相位噪声是相干性和视数的函数.InSAR能检测的地表最大最小形变梯度，除了受到InSAR硬件的限制外，还直接受到InSAR干涉图中噪声强弱的影响.此外，由于多视处理会改变像元的大小，也会引起可检测的最大最小形变梯度显著变化.本文研究了InSAR可检测的地表最大最小形变梯度与相干性和视数的关系，并建立了视数为1、5和20时（ERS和ENVISAT常采用的多视数）InSAR可检测的...