A5031955710- Synthetic Aperture Radar (SAR) Applications and Techniques
- Landslides and related hazards
- Cryospheric studies and observations
- earthquake and tectonic studies
- Soil Moisture and Remote Sensing
- Advanced SAR Imaging Techniques
- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- Optical measurement and interference techniques
- Seismology and Earthquake Studies
- Computational Physics and Python Applications
- Seismic Waves and Analysis
- Geophysics and Gravity Measurements
- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Tree Root and Stability Studies
- 3D Surveying and Cultural Heritage
- Rangeland Management and Livestock Ecology
- Fire effects on ecosystems
- Soil erosion and sediment transport
- Earthquake Detection and Analysis
- Marine and environmental studies
- Image Processing Techniques and Applications
- High-pressure geophysics and materials
National University of Río Negro
2020-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2020-2024
University of Liège
2010-2023
European Center for Geodynamics and Seismology
2020-2023
Centre Hospitalier Universitaire de Liège
2017-2021
Abstract Classical mechanisms of volcanic eruptions mostly involve pressure buildup and magma ascent towards the surface 1 . Such processes produce geophysical geochemical signals that may be detected interpreted as eruption precursors 1–3 On 22 May 2021, Mount Nyiragongo (Democratic Republic Congo), an open-vent volcano with a persistent lava lake perched within its summit crater, shook up this interpretation by producing approximately six-hour-long flank without apparent precursors,...
Abstract Nyiragongo is one of the rare volcanoes on Earth hosting a lava lake. However, understanding its plumbing and lake systems remains limited, with, until recently, only sporadic or time‐limited historical observations measurements. Combining dense accurate crater floor level measurements based 1,703 satellite radar images topographic reconstructions using photogrammetry, we obtain first reliable picture time evolution intra‐crater erupted volumes between two last flank eruptions in...
Abstract The surface velocity field of Shirase Glacier, a fast-flowing East Antarctic outlet glacier, is determined from ERS synthetic aperture radar (SAR) images by means speckle tracking using phase correlation, technique which matches small image kernels two complex SAR maximization the local coherence. Velocity estimates are used to calculate strain rates, then large-scale, vertically integrated force balance and determine major stress components resisting driving stress. For whole...
Synthetic Aperture Radar (SAR) Differential Interferometry (DInSAR) and its extensions to manage time series are nowadays well-known mastered techniques perform among others land-motion monitoring. We present here a fully automated monitoring service based on DInSAR Multidimensional Small Baseline Subset (MSBAS) methods. The processing chain named "InSAR Mass Toolbox for multidimensional Time series" (MasTer) is demonstrated with the peculiar case of Laguna del Maule Domuyo volcanoes, which...
Satellite radar interferometry provides a technique to monitor zone involving active salt tectonic phenomena. We detected movements in the Dead Sea area between 1993 and 1999. These preceded catastrophic collapse (22 March 2000) of newly built 12 km dyke belonging industrial evaporation ponds Arab Potash Company. Eighteen other dykes are present still operational this complex seismotectonic hydrogeological settings. used differential Synthetic Aperture Radar (SAR) (DInSAR) investigate...
This work investigates the possibility of performing target analysis through Multi-Chromatic Analysis (MCA), a technique that basically explores information content sub-band images obtained by processing portions range spectrum synthetic aperture radar (SAR) image. According to behavior SAR signal at different sub-bands, MCA allows classification. Two strategies have been experimented TerraSAR-X acquired over Venice Lagoon, Italy: one exploiting phase interferometric pairs, other using...
Abstract The ever‐increasing amount of Synthetic Aperture Radar (SAR) data motivates the development automatic processing chains to fully exploit opportunities offered by these large databases. Interferometry (InSAR) Mass Toolbox for Multidimensional time series is an optimized tool automatically download SAR data, select interferometric pairs, perform mass processing, compute geocoded deformation maps, invert and display velocity maps 2D on a web page updated incrementally as soon new image...
Ice shelves-the floating extensions of the Antarctic ice sheet-regulate contribution to sea-level rise by restraining grounded flowing from upstream. Therefore, ice-shelf change (e.g., thinning) results in accelerated discharge into ocean, which has a direct effect on sea level. Studying velocity allows monitoring shelves' stability and evolution. Differential synthetic aperture radar interferometry (DInSAR) is common technique highly accurate maps can be inferred at high resolution. Because...
The objective of this study was to use SAR (sensitivity Synthetic Aperture Radar) data detect the supply irrigation water during anthesis and grain-filling phenological stages wheat in irrigated Tadla perimeter Morocco. Backscattering coefficients were derived from four ERS-1 (European Remote-Sensing Satellite-1) images acquired between 31 March 12 April 2011 compared with invoices database. analysis showed that there significant changes backscattering values caused by irrigation, average...
We report the results of a preparatory study aimed at exploring candidate applications that could benefit from passive micro-satellite accompanying L-band SAOCOM-1B satellite Argentina, and to carry out limited demonstration, based on data acquired during ESA airborne campaigns, selected applications. In first step study, potential were identified prioritized mission context strategic applications, scientific need, feasibility. The next was some demonstrations using sets BioSAR 2007-2009,...
Split-Band Interferometry (SBInSAR) exploits the large range bandwidth of new generation synthetic aperture radar (SAR) sensors to process images at subrange bandwidth. Its application an interferometric pair leads several lower resolution interferograms same scene with slightly shifted central frequencies. When SBInSAR is applied frequency-persistent scatterers, linear trend phase through stack can be used perform absolute and spatially independent unwrapping. While height computation has...
Taking advantage of the ever-increasing amount available SAR data requires adapted processing infrastructures. We present here InSAR Mass Toolbox for Multidimensional time series (MasTer), which can combine any type to produce unsupervised vertical and horizontal ground deformation series. MasTer is optimized automatically download data, select appropriate interferometric pairs, perform mass processing, compute geocoded maps, invert display velocity maps 2D on a web page updated...
We propose a method of phase unwrapping based on residue connection, using coherence measurement as complementary information source. Coherence measurements are shown to be improved when an approximated due topographic fringes is removed. The map so obtained used mask guide the connection process.
Ground displacements that cause structural damage to heritage buildings are precipitating cultural and economic value losses. The GEPATAR project (GEotechnical Patrimonial Archives Toolbox for ARchitectural conservation in Belgium) aims creating an online interactive geoinformation tool allows the user view be informed about Belgian at risk due differential ground movements. In last decade, Persistent Scatterer SAR interferometry (PS-InSAR) has proven a powerful technique analysing earth...
Large light-weight telescopes in space are considered key elements enabling future earth observation and science. The first large telescope, "Hubble", uses a monolithic aspheric primary mirror of 2.4 m diameter. Hubble Space Telescope has an area density about 180 kg/m<sup>2</sup>. This approach cannot be used for much larger due to mass volume limitations imposed by today's launch capabilities. Thus the current generation James Webb now under development, makes use segmented 6.5 will below 20
Vertical deformation associated with the displacement of rock glaciers in upper Mapocho river basin, central Andes Chile, was monitored using a series PAZ radar satellite images and DInSAR technique. Forty-one ascending descending orbit were processed Small Baseline Subset (SBAS) Regarding obtained results, it estimated that vertical velocity between October 9, 2019 April 22, 2021 reached up to -22 mm/year movement W-E direction ranged from -47 38 mm/year. This remote sensing technique is...
Multi-Chromatic Analysis (MCA) of SAR images relays on exploring sub-band obtained by processing portions range spectrum located at different frequency positions. It has been applied to interferometric pairs for phase uwrapping and height computation. This work investigates two promising applications: the comparison between frequency-persistent scatterers (PS<sub>fd</sub>) temporal-persistent (PS), use inter-band coherence a single image vessel detection. The MCA technique introduces concept...
Crater morphology at active volcanoes can change rapidly. Quantifying changes during the course of a volcanic unrest episode may help assess level activity. However, limitations such as crater accessibility, cloud cover or intra-crater eruptive activity hamper regular optical on-site monitoring. Here we use multi-sensor satellite Synthetic Aperture Radar (SAR) imagery to produce dense time series quantitative indicators morphological changes. High temporal resolution is achieved by combining...
Abstract Crater morphology undergoes rapid changes at active volcanoes, and quantifying these during volcanic unrest episodes is crucial for assessing activity levels. However, various limitations, including restricted crater access, cloud cover, haze, intra‐crater eruptive activity, often impede regular optical or on‐site monitoring. To overcome challenges, we utilize multi‐sensor satellite Synthetic Aperture Radar (SAR) imagery to generate dense time series of quantitative indicators...
Abstract Understanding seismic tremor wavefields can shed light on the complex functioning of a volcanic system and, thus, improve volcano monitoring systems. Usually, several stations are required to detect, characterize, and locate tremors, which be difficult in remote areas or low-income countries. In these cases, alternative techniques have used. Here, we apply data-reduction approach based analysis three-component data from two co-located operating different times detect analyze...