Simulating SAR geometric distortions and predicting Persistent Scatterer densities for ERS-1/2 and ENVISAT C-band SAR and InSAR applications: Nationwide feasibility assessment to monitor the landmass of Great Britain with SAR imagery

Cigna, Francesca; Bateson, Luke; Jordan, Colm; Dashwood, Claire

doi:10.1016/j.rse.2014.06.025

Cited by 135 publications

(93 citation statements)

References 26 publications

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“…By applying the SqueeSAR™ technique, an improvement of measuring-point density was obtained for the non-irrigable land. However, the PS-DS density for this land use coverage still shows low densities, which are comparable to values obtained using the PSI technique over the non-irrigable arable land in Britain [34]. Higher PS-DS density was detected in the continuous and discontinuous urban fabric (CLC code 11), and the road and rail networks and associated land (CLC code 122), which reach an average of 334.27 ± 43.57 and 137.35 ± 31.96 PS-DS/km 2 , respectively.…”

Section: Advanced Dinsar Datasupporting

confidence: 78%

Methodology for Detection and Interpretation of Ground Motion Areas with the A-DInSAR Time Series Analysis

2016

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Recent improvement to Advanced Differential Interferometric SAR (A-DInSAR) time series quality enhances the knowledge of various geohazards. Ground motion studies need an appropriate methodology to exploit the great potential contained in the A-DInSAR time series. Here, we propose a methodology to analyze multi-sensors and multi-temporal A-DInSAR data for the geological interpretation of areas affected by land subsidence/uplift and seasonal movements.The methodology was applied in the plain area of the Oltrepo Pavese (Po Plain, Italy) using ERS-1/2 and Radarsat data, processed using the SqueeSAR™ algorithm, and covering time spans, respectively, from 1992 to 2000 and from 2003 to 2010. The test area is a representative site of the Po Plain, affected by various geohazards and characterized by moderate rates of motion, ranging from −10 to 4 mm/yr. Different components of motion were recognized: linear, non-linear, and seasonal deformational behaviors. Natural and man-induced processes were identified such as swelling/shrinkage of clayey soils, land subsidence due to load of new buildings, moderate tectonic uplift, and seasonal ground motion due to seasonal groundwater level variations.

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Section: Advanced Dinsar Datasupporting

confidence: 78%

Methodology for Detection and Interpretation of Ground Motion Areas with the A-DInSAR Time Series Analysis

2016

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“…This study site was chosen, with input from geologists working in the area [23] who suspect a complex history of ground deformation related to mining and post-glacial stress relief ( [12][20] [16]), as well as based on the nationwide InSAR (SAR Interferometry) feasibility mapping assessment carried out by the British Geological Survey (BGS) in the project "Assessing the feasibility of InSAR for nationwide monitoring of geohazards in Great Britain: first applications to landslide hazards" [5], [6], [8] . The latter showed potential for the application of InSAR techniques to monitor ground motions over the coalfield, and good likelihood to retrieve moderate to high densities of radar scatterers and coherent targets over the various land cover types of this area.…”

Section: Introductionmentioning

confidence: 99%

“…South Wales represents an area in which a relatively low measurement density would typically be expected from InSAR techniques due to the land cover, land use and topography (Figure 1b) [5], [8]. Typically InSAR ground motions derived from techniques such as SBAS and PSI show the maximum measurement density in urban areas.…”

Section: Introductionmentioning

confidence: 99%

“…Typically InSAR ground motions derived from techniques such as SBAS and PSI show the maximum measurement density in urban areas. Urban areas in South Wales cover approximately 7% of the processed image and are largely confined to the urban centres found along the south coast, such as Cardiff and Swansea, and the mining towns found in the bottom of the deeply incised valleys to the east of the coalfield [8] . Approximately 93% of the processed area is covered by rural landuse types of which the main uses are grasslands for animal grazing, moors and heathlands and non-irrigated arable lands (Figure 1b) [13].…”

Section: Introductionmentioning

confidence: 99%

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The application of the Intermittent SBAS (ISBAS) InSAR method to the South Wales Coalfield, UK

Bateson

Cigna

Boon

et al. 2015

International Journal of Applied Earth Observation and Geoinfor

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135

101

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Satellite radar interferometry is a well-documented technique for the characterization of ground motions over large spatial areas. However, the measurement density is often constrained by the land use, with best results obtained over urban and semi urban areas. We use an implementation of the Small Baseline Subset (SBAS) methodology, whereby areas exhibiting intermittent coherence are considered alongside those displaying full coherence, in the final result, to characterize the ground motion over the South Wales Coalfield, United Kingdom. 55 ERS-1/2 Synthetic Aperture Radar (SAR) C-band images for the period between 1992 and 1999 are processed using the ISBAS (Intermittent Small BAseline Subset) technique, which provides 3.4 times more targets, with associated measurements than a standard SBAS implementation. The dominant feature of the observed motions is a relatively large spatial area of uplift. Uplift rates are as much as 1 cm/yr. and are centred on the part of the coalfield which was most recently exploited. Geological interpretation reveals that this uplift is most likely a result of mine water rebound. Collieries in this part of the coalfield required a ground water to be pumped to enable safe coal extraction; following their closure pumping activity ceased allowing the water levels to return to equilibrium. The ISBAS technique offers significant improvements in measurement density ensuring an increase in detection of surface motions and enabling easier interpretation.

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“…The IPTA processing on the time series of low resolution SAR images [18,19], or high resolution TerraSAR-X SAR images [20,21] had been successfully used to investigate earth surface deformations in a mm/year scale. In IPTA approach, the image recorded on 22 July 2014 was chosen as the common master SAR image, and others are slave images.…”

Section: Procedures Of Sar Image Processingmentioning

confidence: 99%

Characteristics of Surface Deformation Detected by X-band SAR Interferometry over Sichuan-Tibet Grid Connection Project Area, China

Meng

Lan

et al. 2015

Remote Sensing

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Abstract:The Sichuan-Tibet grid connection project is a national key project implemented in accordance with the developmental needs of Tibet and the living requirements of 700 thousand local residents. It is the first grid project with special high voltage that passes through eastern margin of the Tibetan Plateau. The ground deformation due to widely distributed landslides and debris flow in this area is the major concern to the safety of the project. The multi-temporal interferometry technique is applied to retrieve the surface deformation information using high resolution X-band SAR imagery. The time series of surface deformation is obtained through the sequential high spatial and temporal resolution TerraSAR images (20 scenes of X-band TerraSAR SLC images acquired from 5 January 2014 to 12 December 2014). The results have been correlated with the permafrost activities and intensive precipitation. They show that the study area is prone to slow to moderate ground motion with the range of −30 to +30 mm/year. Seasonal movement is observed due to the freeze-thaw cycle effect and intensive precipitation weather condition. Typical region analysis suggests that the deformation rate tends to increase dramatically during the late spring and late autumn while slightly during the winter time. The correlations of surface deformations with these two main trigger factors were further discussed. The deformation curves of persistent scatterers in the study area showing the distinct seasonal characteristics OPEN ACCESSRemote Sens. 2015, 7 12266 coincide well with the effect of freeze-thaw cycle and intensive precipitation. The movement occurring at late spring is dominated by the freeze-thaw cycle which is a common phenomenon in such a high-elevated area as the Tibetan Plateau. Intensive precipitation plays more important role in triggering landsides in the summer season. The combining effect of both factors results in fast slope movement in May. The results also suggest that the movement often occur at the middle to toe part of the slope where the combining effect of freeze-thaw cycle and precipitation plays an important role. Therefore the majority of transmission towers are not threatened significantly by geological hazards since they are located on the higher elevation which is beyond the boundary of slope movement. The comparison between field observations and the persistent scatterers interferometry (PSI) results reveals good agreement in obvious deformation accumulations. High uncertainty still exists due to issue of SAR imagery quality and the persistent scatterers interferometry technique. Nevertheless, this study provides an insight into understanding the characteristics of ground movement trend in the complicated eastern Tibet area.

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Simulating SAR geometric distortions and predicting Persistent Scatterer densities for ERS-1/2 and ENVISAT C-band SAR and InSAR applications: Nationwide feasibility assessment to monitor the landmass of Great Britain with SAR imagery

Cited by 135 publications

References 26 publications

Methodology for Detection and Interpretation of Ground Motion Areas with the A-DInSAR Time Series Analysis

Methodology for Detection and Interpretation of Ground Motion Areas with the A-DInSAR Time Series Analysis

The application of the Intermittent SBAS (ISBAS) InSAR method to the South Wales Coalfield, UK

Characteristics of Surface Deformation Detected by X-band SAR Interferometry over Sichuan-Tibet Grid Connection Project Area, China

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