Journal Article10.1029/2004GL021737
A new method for measuring deformation on volcanoes and other natural terrains using InSAR persistent scatterers
TL;DR: In this paper, a new InSAR persistent scatterer (PS) method was proposed for analyzing episodic crustal deformation in non-urban environments, with application to volcanic settings.
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Abstract: [1] We present here a new InSAR persistent scatterer (PS) method for analyzing episodic crustal deformation in non-urban environments, with application to volcanic settings. Our method for identifying PS pixels in a series of interferograms is based primarily on phase characteristics and finds low-amplitude pixels with phase stability that are not identified by the existing amplitude-based algorithm. Our method also uses the spatial correlation of the phases rather than a well-defined phase history so that we can observe temporally-variable processes, e.g., volcanic deformation. The algorithm involves removing the residual topographic component of flattened interferogram phase for each PS, then unwrapping the PS phases both spatially and temporally. Our method finds scatterers with stable phase characteristics independent of amplitudes associated with man-made objects, and is applicable to areas where conventional InSAR fails due to complete decorrelation of the majority of scatterers, yet a few stable scatterers are present.
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Citations
A fuzzy identification method for persistent scatterers in PSInSAR technology
TL;DR: Two groups of real data tests indicate that the new method can not only recognize more effective and reliable PS, but also can obtain the better quality results of selected PS, which can be used to evaluate the result of deformation and further improve the PSInSAR technology.
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Seasonal Surface Fluctuation of a Slow-Moving Landslide Detected by Multitemporal Interferometry (MTI) on the Huafan University Campus, Northern Taiwan
TL;DR: In this paper, the multitemporal interferometry (MTI) technique was applied with Sentinel-1 SAR images to monitor the slow-moving landslide from 2014-2019, and the slow moving areas detected by persistent scatterer (PS) pixels are consistent with the range of previous studies.
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Assessment of the Contribution of Polarimetric Persistent Scatterer Interferometry on Sentinel-1 Data
TL;DR: In this article , the authors explored the reason why the VH channel increases the number of measurement points when using the amplitude dispersion ( $D_{A}$ ) as selection criterion.
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Multi-Source SAR-Based Surface Deformation Monitoring and Groundwater Relationship Analysis in the Yellow River Delta, China
TL;DR: In this paper , the authors used multidisciplinary data of image geodesy, geophysics, geology and hydrogeology to provide insights into Earth surface displacement patterns and dynamics in the Yellow River delta.
References
Permanent scatterers in SAR interferometry
TL;DR: The authors present a complete procedure for the identification and exploitation of stable natural reflectors or permanent scatterers (PSs) starting from long temporal series of interferometric SAR images.
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Decorrelation in interferometric radar echoes
Howard A. Zebker,J. Villasenor +1 more
TL;DR: It is found that there is decorrelation increasing with time but that digital terrain model generation remains feasible and such a technique could provide a global digital terrain map.
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Nonlinear subsidence rate estimation using permanent scatterers in differential SAR interferometry
TL;DR: In this article, a new approach to the estimation of the atmospheric phase contributions, and the local displacement field is proposed based on simple statistical assumptions, is presented in order to cope with nonlinear motion of the targets.
Interferometric point target analysis for deformation mapping
Charles Werner,Urs Wegmüller,Tazio Strozzi,Andreas Wiesmann +3 more
- 21 Jul 2003
TL;DR: The IPTA concept is introduced, including the point selection criteria, the phase model and the iterative improvement of the model parameters, to exploit the temporal and spatial characteristics of interferometric signatures collected from point targets.
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Deflation of Mount Etna monitored by spaceborne radar interferometry
TL;DR: In this paper, the authors used a simple model based on the change of pressure in a sphere located in an elastic half-space to detect the inflation of volcanic edifices that usually precedes eruptions.
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