Use of ground-based synthetic aperture radar to investigate the complex 3-D kinematics of a large open pit slope

Severin, J.; Eberhardt, E.; Leoni, L.; Fortin, S.

doi:10.1201/b11646-379

Cited by 15 publications

(14 citation statements)

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“…TRI has therefore been successfully used in open pit mining environments for hazard assessment and early warning of slope failures (Reeves et al, 2000;Harries et al, 2006;Eberhardt et al, 2008;Harries et al, 2009;Severin et al, 2011;Osasan, 2012;Agliardi et al, 2013). TRI has therefore been successfully used in open pit mining environments for hazard assessment and early warning of slope failures (Reeves et al, 2000;Harries et al, 2006;Eberhardt et al, 2008;Harries et al, 2009;Severin et al, 2011;Osasan, 2012;Agliardi et al, 2013).…”

Section: Recent Applications Of Tri For Measuring Surface Change In Tmentioning

confidence: 99%

“…This was shown by reconstruction of the 3D displacement field from glaciers that were based on ascending and descending passes of satellites (Mohr et al, 1998). A similar concept can be applied to TRI, where at least two different measurement positions and basic assumptions of the displacement mechanics can be combined to infer a 3D displacement pattern (Severin et al, 2011). For the determination of real 3D displacement fields, the acquisition angles of the LOS axes need to be as perpendicular as possible to each other.…”

Section: Precision and Los Sensitivitymentioning

confidence: 99%

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A review of terrestrial radar interferometry for measuring surface change in the geosciences

Caduff

Schlunegger

Kos

et al. 2014

Earth Surf Processes Landf

156

105

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This paper presents a review of the current state of the art in the use of terrestrial radar interferometry for the detection of surface changes related to mass movement. Different hardware‐types and acquisition concepts are described, which use either real or synthetic aperture for radar image formation. We present approaches for data processing procedures, paying special attention to the separation of high resolution displacement information from atmospheric phase variations. Recent case studies are used to illustrate applications in terrestrial radar interferometry for change detection. Applications range from detection and quantification of very slow moving (millimeters to centimeters per year) displacements in rock walls from repeat monitoring, to rapid processes resulting in fast displacements (~50 m/yr) acquired during single measurement campaigns with durations of only a few hours. Fast and episodic acting processes such as rockfall and snow avalanches can be assessed qualitatively in the spatial domain by mapping decorrelation caused by those processes. A concluding guide to best practice outlines the necessary preconditions that have to be fulfilled for successful application of the technique, as well as in areas characterized by rapid decorrelation. Empirical data from a Ku‐band sensor show the range of temporal decorrelation of different surfaces after more than two years for rock‐surfaces and after a few seconds to minutes in vegetated areas during windy conditions. The examples show that the displacement field can be measured for landslides in dense grassland, ice surfaces on flowing glaciers and snowpack creep. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Recent Applications Of Tri For Measuring Surface Change In Tmentioning

confidence: 99%

Section: Precision and Los Sensitivitymentioning

confidence: 99%

A review of terrestrial radar interferometry for measuring surface change in the geosciences

Caduff

Schlunegger

Kos

et al. 2014

Earth Surf Processes Landf

156

105

View full text Add to dashboard Cite

show abstract

“…High accuracy (below 1 mm) and sampling rate (1-5 min depending on the sensor) make TRI suitable for applications demanding quasi-areal and near real-time displacement information under a broad range of meteorological conditions. Actually, TRI is now widely applied for deformation monitoring, in particular for monitoring landslides (Antonello et al 2003;Mazzanti et al 2014), open pit mine fields (Severin et al 2011), snow covered slopes and glaciers (Luzi et al 2009;Butt et al 2016a), volcanoes (Intrieri et al 2013), and rockfalls (Rabatel et al 2008;Miller et al 2013). One of the key challenges is a successful mitigation of atmospheric effects, which may completely mask the actual displacement (Luzi et al 2004;Butt et al 2016b).…”

Section: Introductionmentioning

confidence: 99%

On the impact of rockfall catch fences on ground-based radar interferometry

Frukacz

2017

Landslides

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Rockfalls are major natural hazards in mountainous regions and as such monitored if they pose a high risk to people or infrastructure. Ground-based radar interferometry is a relatively new technique suitable for such monitoring. It offers the potential for determining sub-mm-to mm-level displacements by remote measurements under various weather conditions. To avoid damage from smaller rocks and debris, critical surfaces are often protected by rockfall catch fences. We present an experimental investigation proving that the radar measurements are indeed significantly affected by a catch fence made of steel even if its mesh size is larger compared to that of the wavelength of the radar. A stable rock wall in a quarry was monitored by means of a ground-based synthetic aperture radar for 2 days. Different fences varying in shape, size, and density of mesh and in various geometrical configurations were erected at different locations for short periods of time during the experiment. We show that for surfaces observed through the fence, the reflected power can be reduced by 20 dB and thus the signal-to-noise ratio is significantly deteriorated. We also observed spurious interferometric phase shifts. Even parts of the rock wall not covered by the fences are affected. Side lobes and mixed pixels result, e.g., in severe loss of coherence and thus potentially mask actual displacements.

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“…With the flexibility, GB-SAR can acquire deformations from as large as several meters per hour to as small as few millimeters per year by adjusting the observation model and period. So it can be applied in open pit slope stability monitoring (Casagli et al, Farina et al, 2011;Farina et al, 2012;Mecatti et Al., 2010;and Severin et al, 2011), landslides monitoring (Tarchi et al, 2003b;Luzi et al, 2006;Herrera et al, 2009;Corsini et al, 2013;Barla et al, 2010;Schulz et al, 2012), urban monitoring (Pieraccini et al, 2004;Tapete et al, 2013;Pipia et al, 2013), structure monitoring (Tarchi et al, 1997), dam monitoring (Tarchi et al,1999;Alba et al, 2008;Luzi et al, 2010a), and glacier monitoring (Luzi et al, 2007, Noferini et al, 2009Hyangsun and Hoonyol, 2011). GB-SAR data can be acquired using two types modes: the continuous (C-GBSAR) and the dis-continuous (D-GBSAR).…”

Section: Introductionmentioning

confidence: 99%

A Rail Central Displacement Method About Gb-Sar

Peng

Cai

Yang

2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:This paper presents a new method to correct rail errors of Ground Based Synthetic Aperture Radar (GB-SAR) in the discontinue mode. Generally, "light positioning" is performed to mark the GB-SAR position in the dis-continuous observation mode. Usually we assume there is no difference between the marked position and the real installation position. But in fact, it is hard to keep the GB-SAR positions of two campaigns the same, so repositioning errors can't be neglected. In order to solve this problem, we propose an algorithm to correct the rail error after analyzing the GB-SAR rail error geometry. Results of the simulation experiment and the real experiment of a landslide in Lvliang, Shanxi, China, show the proposed method achieves an mm-level precision, enabling the D-GBSAR mode to be used in engineering projects.

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Use of ground-based synthetic aperture radar to investigate the complex 3-D kinematics of a large open pit slope

Cited by 15 publications

References 0 publications

A review of terrestrial radar interferometry for measuring surface change in the geosciences

A review of terrestrial radar interferometry for measuring surface change in the geosciences

On the impact of rockfall catch fences on ground-based radar interferometry

A Rail Central Displacement Method About Gb-Sar

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