Anna Barra

Anna Barra
CTTC Catalan Telecommunications Technology Centre | CTTC

Doctor of Philosophy

About

87
Publications
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651
Citations

Publications

Publications (87)
Article
A C-band Low-cost Active Reflector (AR) has been tested in a real experimental campaign aimed at monitoring through multi-temporal InSAR an area threatened by a landslide that occurred in 2019. To monitor and characterize the movement, a network of eight Passive Corner Reflectors and one Active Reflector were installed along a forested slope. A set...
Article
Full-text available
The Lisbon metropolitan area (LMA, central-west of Portugal) has been severely affected by different geohazards (flooding episodes, landslides, subsidence, and earthquakes) that have generated considerable damage to properties and infrastructures, in the order of millions of euros per year. This study is focused on the analysis of subsidence, as re...
Article
Full-text available
The increasing availability of Synthetic Aperture Radar (SAR) images facilitates the generation of rich Differential Interferometric SAR (DInSAR) data. Temporal analysis of DInSAR products, and in particular deformation Time Series (TS), enables advanced investigations for ground deformation identification. Machine Learning algorithms offer efficie...
Article
Full-text available
This paper focuses on the application of spaceborne radar interferometry as a tool for assisting the monitoring different types of infrastructures, including railways and highways. The Persistent Scatterer Interferometry (PSI) technique, the most advanced class of differential interferometric Synthetic Aperture Radar techniques (DInSAR), is used to...
Article
Full-text available
Monitoring ground deformation at national and regional level with millimetre-scale precision, nowadays, is possible by using Advanced Differential Interferometric SAR (A-DInSAR) techniques. This study concerns the results of the European Ground Motion Service (EGMS), part of the Copernicus Land Monitoring Service, which detects and measures land di...
Article
Full-text available
Radar interferometry has progressed very much in the last two decades. It is now a powerful remote sensing techniques to monitor ground motion. The technique has undergone an important development in terms of processing and data analysis algorithms. This has been accompanied by an important increase of the Synthetic Aperture Radar (SAR) data acquis...
Article
Full-text available
Temporal analysis of deformations Time Series (TS) provides detailed information of various natural and humanmade displacements. Interferometric Synthetic Aperture Radar (InSAR) generates millimetre-scale products, indicating the chronicle behaviour of detected targets via TS products. Deep Learning (DL) can handle a massive load of InSAR TS to cat...
Article
Full-text available
This work addresses a methodology based on the Interferometric Synthetic Aperture Radar (InSAR) to analyse and monitor ground motion phenomena induced by underground mining activities, in the Legnica-Glogow Copper District, south-western Poland. Two stacks of ascending and descending Sentinel-1 Synthetic Aperture Radar (SAR) images are processed wi...
Conference Paper
Full-text available
In this work, the A-DInSAR techniques are applied in Central Asturias (N Spain). In this area, the presence of the most important cities in the region is remarkable, as well as industry and port infrastructures and a dense road network. Moreover, this region is specially known for their historical coal exploitation, which was developed mainly on th...
Conference Paper
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Las líneas ferroviarias pueden verse afectadas por procesos de origen geológico o geotécnico (e.g. movimientos de ladera o asien-tos). Estos procesos se manifiestan en la superficie del terreno a través de deformaciones que pueden a su vez afectar a las infra-estructuras suprayacentes y al funcionamiento normal del servicio. La identificación de es...
Conference Paper
Full-text available
Las líneas ferroviarias pueden verse afectadas por procesos de origen geológico o geotécnico (e.g. movimientos de ladera o asien-tos). Estos procesos se manifiestan en la superficie del terreno a través de deformaciones que pueden a su vez afectar a las infra-estructuras suprayacentes y al funcionamiento normal del servicio. La identificación de es...
Article
Full-text available
This work addresses a methodology based on the interferometric synthetic aperture radar (InSAR) applied to analyze and monitor ground-motion phenomena induced by underground mining activities in the Legnica-Glogow copper district, south-western Poland. The adopted technique employs an InSAR processing chain that exploits a stack of Sentinel-1 synth...
Article
Full-text available
Displacement time series (TS) provides temporal and spatial information related to ground deformation. This study aims to investigate temporal behavior of ground deformation TS, including classification of displacement trends and periodicity evaluation, which ease the interpretation of movements. To this end, we propose several modifications to an...
Conference Paper
Full-text available
Geohazard prone areas require continuous monitoring to detect risks, understand the phenomena occurring in those regions and prevent disasters. Satellite interferometry (InSAR) has come to be a trustworthy technique for ground movement detection and monitoring in the last few years. InSAR based techniques allow to process large areas providing high...
Conference Paper
The new European round Motion Service (Copernicus) opens a new perspective in the use of Satellite Synthetic Aperture Radar Interferometry (InSAR) products. Moreover, the start-up of new constellations with systematic acquisition policies and free data access like Sentinel-1, is increasing the interest in these techniques. In this context, not only...
Preprint
When an active landslide is first identified in an artificial reservoir, a comprehensive study has to be quickly conducted to analyse the possible hazard that it may represent to such a critical infrastructure. This paper presents the case of the El Arrecife Landslide, located in a slope of the Rules Reservoir (Southern Spain), as an example of geo...
Article
[See the full-text in the following link: https://rdcu.be/cyFI0]. When an active landslide is first identified in an artificial reservoir, a comprehensive study has to be quickly conducted to analyse the possible hazard that it may represent to such a critical infrastructure. This paper presents the case of the El Arrecife Landslide, located in a s...
Article
Full-text available
The cliff coastline of the central region of Asturias (N Spain) is severely affected by terrain instabilities, causing considerable damage to properties and infrastructures every year. In this study, we applied the A-DInSAR technique based on Sentinel-1 imagery to map and monitor active slopes in an emblematic rocky area of the Asturian coast: the...
Article
Full-text available
Co-financed by the Interreg V Program in Spain-France-Andorra (POCTEFA) the European project MOMPA (MOnitoring of ground Movements and Action Protocol) study the landslide hazard in the Eastern Pyrenees. It groups together scientific partners from CTTC (Telecommunications Centre of Catalonia), ICGC (Cartographical and Geological Institute of Catalu...
Conference Paper
Full-text available
This work addresses the problem of estimating and filtering the Atmospheric Phase Screen from a stack of image phases, extracted from a sequence of SAR images using the PSInSAR approach. Leveraging the assumption that the atmospheric disturbance is a signal with a high spatial correlation and low temporal correlation, a Nonequispaced FFT is used to...
Conference Paper
La cadena PSIG, en producción desde hace ya una década y media, ha sido desarrollada desde sus inicios por el personal de la actual división de Geomática del Centre Tecnològic de Telecomunicacions de Catalunya. Dicha cadena goza de un altísimo grado de automatización, pero aún así es capaz de ofrecer a sus usuarios una gran flexibilidad, dando la p...
Conference Paper
Full-text available
El objetivo del proyecto POCTEFA - MOMPA (MOnitorización de Movimientos del terreno y Protocolo de Actuación) esproporcionar una herramienta técnico-operativa útil para la prevención y la gestión de los riesgos ocasionados pormovimientos de ladera, a nivel transfronterizo, basada en la técnica de seguimiento satelital InSAR. (Interferometría Radara...
Preprint
CITATIONS 0 READ 1 8 authors, including: Some of the authors of this publication are also working on these related projects: ABSTRACT This work addresses the problem of estimating and filtering the Atmospheric Phase Screen from a stack of image phases, extracted from a sequence of SAR images using the PSInSAR approach. Leveraging the assumption tha...
Article
Full-text available
This paper is focused on the design, implementation and testing of an active reflector, to be used to support deformation monitoring studies based on Synthetic Aperture Radar interferometry. The device is designed to work in C-band with Sentinel-1 data, operating at 5.405 GHz ± 50 MHz. A brief description of the active reflector is provided. It con...
Article
Full-text available
The Geomatics Division of the Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) has been producing terrain displacement maps for more than 15 years using the PSIG software chain, developed entirely by the members of the aforesaid group. PSIG has reached a high level of maturity, being highly automated but also offering the user the possibi...
Article
Full-text available
Slope failures pose a substantial threat to mining activity due to their destructive potential and high probability of occurrence on steep slopes close to limit equilibrium conditions, which are often found both in open pits and in waste and tailing disposal facilities. The development of slope monitoring and modeling programs usually entails the e...
Preprint
Full-text available
Abstract: Slope failures pose a substantial threat to mining activity due to their destructive potential and high probability of occurrence on steep slopes close to limit equilibrium conditions, often found both in open pits and in waste and tailing disposal facilities. The development of slope monitoring and modeling programs usually entails the e...
Article
Full-text available
Persistent scatterer interferometry (PSI) is a group of advanced interferometric synthetic aperture radar (SAR) techniques used to measure and monitor terrain deformation. Sentinel-1 has improved the data acquisition throughout and, compared to previous sensors, increased considerably the differential interferometric SAR (DInSAR) and PSI deformatio...
Conference Paper
Full-text available
This work, developed in the Alt Urgell and La Cerdanya counties (Catalunya, NE Spain) has served as the basis for the geological risk identification associated with ground movements. The methodology is based on the use of the Active Deformation Areas (ADA) detected by medium resolution radar satellite interferometry (Sentinel-1A and Sentinel-1B). T...
Article
The aim of this paper is to demonstrate how the integration of differential interferometric synthetic aperture radar (D-InSAR) and levelling improves the monitoring of ground deformation phenomena, thereby enabling their complete understanding. The complementarity between D-InSAR and levelling is illustrated through a case study of the construction...
Chapter
In this work we exploited Sentinel-1 satellite radar images processed by means of Persistent Scatterers Interferometry (PSI) techniques for the evaluation of landslide geohazard and impact on a mountainous region. In particular, we used PSI data as starting point in a working chain whose final goal is the estimation of the potential worth of loss o...
Article
Full-text available
This study focuses on deformation mapping and monitoring using Sentinel-1 radar data and the DInSAR (Differential Interferometric Synthetic Aperture Radar) technique. In particular, a Persistent Scatterer Interferometry technique was used over 15000 km² of the Pyrenees, located in Spain, Andorra and France. The main goal is to monitor deformations...
Article
Full-text available
Underground mining is one of the human activities with the highest impact in terms of induced ground motion. The excavation of the mining levels creates pillars, rooms and cavities that can evolve in chimney collapses and sinkholes. This is a major threat where the mining activity is carried out in an urban context. Thus, there is a clear need for...
Article
Full-text available
The application of Satellite Differential SAR interferometry (DInSAR) has become a reliable solution as a tool for mapping and monitoring geohazards. Few years ago, the main applications of these techniques were devoted to science. However, nowadays, the easy access to SAR imagery and the maturity of the techniques to exploit these type of data has...
Article
Full-text available
This work describes the set of tools developed, tested, and put into production in the context of the H2020 project Multi-scale Observation and Monitoring of Railway Infrastructure Threats (MOMIT). This project, which ended in 2019, aimed to show how the use of various remote sensing techniques could help to improve the monitoring of railway infras...
Article
Full-text available
This paper is focused on SAR interferometry for deformation monitoring, based on the use of passive and active reflectors. Such reflectors are needed in all cases where a sufficient response from the ground is not available. In particular, the paper describes the development of a low-cost active reflector. This development was carried out in an EU...
Data
Mapa de eventos metereológicos extremos en las costas de Portugal, España y sur de Francia durante los últimos 10 años. Pérdidas humanas y económicas.
Article
Full-text available
The island of Gran Canaria (Canary Islands, Spain) is characterized by a large variability of volcanic rocks, reflecting its volcanic evolution resulting from the built-up process of an intraplate oceanic island. The geological map provided by Geological Survey of Spain at 1:25.000 scale shows more than 109 different lithologies and it is too compl...
Technical Report
Full-text available
Este informe tiene como finalidad resumir los mecanismos existentes en España para gestionar los peligros geológicos ligados al clima, así como ofrecer datos actuales sobre los mismos: inundaciones, deslizamientos y desprendimientos rocosos, riesgos costeros, etc. El trabajo analiza una serie de cuestionarios compartidos a la comunidad científica,...
Technical Report
Full-text available
La Actividad 1.1 del GT 1 de RISKCOAST tiene como finalidad llevar a cabo un exhaustivo inventario de los eventos costeros ocurridos durante los últimos 10 años, que hayan generado alarma y daños significativos en el territorio SUDOE de cada uno de los países participantes. Como «significativo» ha de entenderse eventos con víctimas mortales y/o dañ...
Article
Slope failures occur in open-pit mining areas worldwide, producing considerable damage in addition to economic loss. Identifying the triggering factors and detecting unstable slopes and precursory displacements —which can be achieved by exploiting remote sensing data— are critical for reducing their impact. Here we present a methodology that combin...
Conference Paper
The InSAR technique has been proved to be a powerful tool in order to detect, monitoring and analyse movements related to geological phenomena. Its application ranges from regional/national scale to a very detailed scale, up to a single building analysis. Moreover, since 2014, the free and constant availability of Sentinel-1 data has been helping t...
Poster
Full-text available
Ground displacements associated to landslides can be analysed by means of geological,geotechnical, topographic and remote sensing techniques. In this work different classicaltopographic techniques are combined with a satellite based remote sensing technique:Differential SAR Interferometry (DInSAR). The topographic techniques provide precisemeasurem...
Conference Paper
Full-text available
The European Space Agency’s Geohazard Exploitation Platform (GEP) (https://geohazardstep. eu/#!) is a web-based platform through users can perform independent analysis by exploiting satellite data. This platform hosts several thematic apps that allow to identify, monitor and asses hazard related to geological processes such as volcanism, land subsi...
Article
Full-text available
Landslides recurrently impact the Italian territory, producing huge economic losses and casualties. Because of this, there is a large demand for monitoring tools to support landslide management strategies. Among the variety of remote sensing techniques, Interferometric Synthetic Aperture Radar (InSAR) has become one of the most widely applied for l...
Article
Full-text available
Landslides in reservoir contexts are a well-recognised hazard that may lead to dangerous situations regarding infrastructures and people’s safety. Satellite-based radar interferometry is proving to be a reliable method to monitor the activity of landslides in such contexts. Here, we present a DInSAR (Differential Interferometric Synthetic Aperture...
Article
Full-text available
Multi-Temporal Interferometric Synthetic Aperture Radar (MTInSAR) data offer a valuable support to landslide mapping and to landslide activity estimation in mountain environments, where in situ measures are sometimes difficult to gather. Nowadays, the interferometric approach is more and more used for wide-areas analysis, providing useful informati...
Conference Paper
Full-text available
U-Geohaz (Geohazard impact assessment for urban areas) is a two years project that is focused on monitoring geohazard-associated ground deformations, a key prevention action that will be specifically addressed to urban areas and critical infrastructures. The project will propose a procedure to produce maps to assess continuously the potential impac...
Conference Paper
Full-text available
The H2020 MOMIT project (Multi-scale Observation and Monitoring of railway Infrastructure Threats, http://www.momit-project.eu/) is focused on showing how remote sensing data and techniques may help to monitor railway infrastructures. One of the hazards monitored are the ground movements nearby such infrastructures. Two methodologies targeted at th...
Article
Full-text available
The H2020 MOMIT project (Multi-scale Observation and Monitoring of railway Infrastructure Threats, http://www.momit-project.eu/) is focused on showing how remote sensing data and techniques may help to monitor railway infrastructures. One of the hazards monitored are the ground movements nearby such infrastructures. Two methodologies targeted at th...
Article
Full-text available
This work describes a new procedure aimed to semi-automatically identify clusters of active persistent scatterers and preliminarily associate them with different potential types of deformational processes over wide areas. This procedure consists of three main modules: (i) ADAfinder, aimed at the detection of Active Deformation Areas (ADA) using Per...
Article
Full-text available
This paper describes a Persistent Scatterer Interferometry procedure for deformation monitoring. Its more original part concerns an approach to estimate the atmospheric phase component. The procedure can be used to monitor deformation areas that are relatively small and are surrounded by stable areas. The proposed procedure is described step by ste...
Conference Paper
Full-text available
The MOMIT project is targeted at showing how remote sensing techniques may help to monitor and then maintain railway infrastructures. This project has defined several demostrators to fulfill such goal. The authors have been involved in the design and development of several sofware tools needed to implement the first demonstrator, dealing with groun...
Conference Paper
Full-text available
This work describes a procedure developed in the framework of the EU project “Multi-scale observation and monitoring of railway infrastructure threats” (MOMIT, 2018) to semi-automatically identify clusters of persistent scatterers and preliminarily associate them to different potential types of geological-geotechnical hazards affecting infrastructu...
Conference Paper
Full-text available
The coast of Granada (southern Spain) has already been the subject of several studies about landslides in urban areas. This is the case of (1) Cármenes del Mar, (2) Marina del Este, (3) Alfamar and (4) Monte de los Almendros resorts. Previous studies evidence that Cármenes del Mar and Marina del Este resorts were built in hillsides affected by quie...
Conference Paper
Full-text available
The Rules Reservoir is located in the Guadalfeo River to the south of Sierra Nevada (Betic Chain, SE Spain). This reservoir has a storage capacity of 117 hm3 and it supplies water to the populations, subtropical crops and greenhouses in the coast of Granada. The construction of the reservoir presented difficulties due to the instability