نتایج جستجو برای: روش insar

تعداد نتایج: 372355  

2003
M. H. Kamaruddin J. R. Abdul Hamid P. M. Mather H. Balzter

SAR Interferometry (InSAR) provides data that contain information relating to the phase and coherence components of the backscattered radar signals. Phase information is used to derive Digital Elevation Models (DEM). This paper presents the results of an analysis of the accuracy of InSAR DEM derived from ESAR L-band airborne repeat-pass fully polarimetric InSAR data, which were acquired over Th...

2011
J. Weston A. M. G. Ferreira G. J. Funning

[1] While many earthquakes have now been studied using interferometric synthetic aperture radar (InSAR) data, a full assessment of the quality and additional value of InSAR source parameters compared to seismological techniques is still lacking. We compile a catalog of source models obtained using InSAR and estimate the corresponding centroid moment tensor (CMT) parameters; we refer to this com...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1390

تکنیک تداخل سنجی راداری(d-insar) به عنوان یک روش مناسب جهت آشکار سازی تغییرات بوجود آمده در سطح زمین می باشد. محاسبه جابجایی های رخ داده در سطح زمین با استفاده از تکنیک d-insar شامل قابلیت های منحصر بفردی در ابعاد هزینه، زمان و دقت نسبت به تکنیکهای دیگر سنجش است. در مطالعه حاضر نرخ و دامنه فرونشست در سطح دشت مرند، با استفاده از تکنیک d-insar در بازه زمانی خرداد 1383- بهمن 1389 محاسبه و تعیین گش...

1997
RICHARD BAMLER Wessling

Interferometric synthetic aperture radar (InSAR) is a rapidly evolving technology for DTM generation. It exploits the coherent nature of SAR imaging to measure stereo parallaxes in the mm and cm regime from phase differences. InSAR systems are active microwave sensors; they operate independent of cloud cover and sun illumination. This paper reviews the basic principle and the properties of spac...

2004
Dennis Odijk

Although leveling is a very precise technique for geodetic deformation monitoring, it is quite expensive and timeconsuming. InSAR is a relatively new technique for precise deformation monitoring and has some important advantages compared to leveling: the high spatial resolution of the data and the relatively low costs of the technique. In this article both techniques are considered for the esti...

2000
K. Clint Slatton Melba M. Crawford Brian L. Evans

The ability to measure land surface topography over large areas to assess natural hazard threats posed by seismic and flooding events is a critical, international need. Interferometric synthetic aperture radar (INSAR) has been used to map topography; however, accuracies are limited because observations are not measurements of true surface topography over vegetated areas. Instead, the measuremen...

2006
Wenqin Wang

Bistatic SAR uses separated transmitted and receiver flying on different platforms. Such a spatial separation has several operational advantages in military applications the vulnerability of the system is reduced, because the transmitter can be positioned far away, while the passive receiver is difficult to locate. The bistatic along track interferometric SAR (AT−InSAR) model is one kind of bis...

2005
W. Y. Lau D. Meng

In the process Interferometric Synthetic Aperture Radar (InSAR) derived Digital Elevation Models (DEMs), coherence enhances the raw interferograms in order to achieve a good estimation of the difference in the optical paths related to topography. Furthermore, it is an important parameter qualifying the accuracy of the interferometric measurements. The aim of this study is to examine the effect ...

2006
Antje Thiele Ulrich Thoennessen Erich Cadario

The improved ground resolution of state-of-the-art synthetic aperture radar (SAR) sensors suggests utilizing this technique for the analysis of urban areas. However, building reconstruction from SAR or InSAR data suffers from consequences of the inherent oblique scene illumination, such as foreshortening, layover, occlusion by radar shadow and multipath signal propagation. Especially in built-u...

Journal: :Remote Sensing 2016
Wei Zhou Shaolin Li Zhiwei Zhou Xiaolin Chang

Settlement is one of the most important deformation characteristics of high concrete faced rockfill dams (CFRDs, >100 m). High CFRDs safety would pose a great threat to the security of people’s lives and property downstream if this kind of deformation were not to be measured correctly, as traditional monitoring approaches have limitations in terms of durability, coverage, and efficiency. It has...

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