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Intense groundwater exploitation and seasonal fluctuations of water level in phreatic aquifer cause land subsidence disasters. To better understand the land subsidence mechanism caused by groundwater withdrawal, a small-scale sand-clay interbedded model box was built to carry out consolidation and rebound tests during two drainage-recharge cycles. Distributed fiber optical sensing (DFOS) technologies...
It is well know that atmospheric phase screen(APS) effect in Small Baseline Subset (SBAS) D-InSAR processing to obtain ground deformation in long time series leads to additional interferometry phase and the unreliable result. To solve the problem above, MODIS product provide a mean to stimulate atmospheric field of SAR data for reducing the APS effect in D-InSAR processing. In this paper, 12 ENVISAT...
Persistent Scatterers for SAR Interferometry (PS-InSAR) tecnique allows monitoring the temporal evolution of a deformation phenomenon at millimeter level, via the generation of mean deformation velocity maps and displacement time series from a data set of acquired SAR images. However, the serious noises of multi-temporal SAR images make the selection of permanent scatters (PSs) difficult. In this...
By estimating the phase information of stable natural reflectors or permanent scatterers of a set of SAR images, Persistent Scatterers for SAR Interferometry (PSInSAR) can be used to obtain the land subsidence information at milimeter level while the serious noises of multi-temporal SAR images which make it difficult. In this study, we study the influence of PS-InSAR method based on wavelet phase...
Decorrelation caused by temporal change and SAR imaging geometry prevents conventional SAR interferometry from monitoring land surface subsidence precisely. In addition, conventional methods donpsilat deal with phase delay which caused by atmosphere. It negatively influences the accuracy of differential synthetic aperture radar interferometry (D-InSAR) for small-scale deformation monitoring. In this...
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