Exploració per tema "Radar d'obertura sintètica"

Ara es mostren els items 102-121 de 243

    • Fast simulation performance evaluation of spaceborne SAR-GMTI missions for maritime applications 

      Makhoul Varona, Eduardo; Zhan, Yu; Ceba Vega, Francisco; Broquetas Ibars, Antoni; Beaton, Alasdhair; Letterio, Federico; Tonetti, Stefania; Barbarossa, Sergio; di Lorenzo, Paolo; Maffei, Marco (VDE Conference Publications, 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents a flexible simulator for Ground Moving Target Indication (GMTI) in the frame of spaceborne Synthetic Aperture Radar (SAR) over maritime scenarios. The simulation tool provides GMTI performance metric ...

    • Feasibility study of geosynchronous SAR satellites 

      Guzmán Bofarull, Marc (Universitat Politècnica de Catalunya, 2014-07-11)
      Projecte/Treball Final de Carrera
      Accés restringit per acord de confidencialitat
      [ANGLÈS] The project is a feasibility study of a new mission concept of Earth Observation based on GEOsynchronous SAR satellites (GEOSAR). More specifically the bistatic GEOSAR is analysed, with the transmitter and receiver ...

    • Filtering and segmentation of polarimetric SAR data based on binary partition trees 

      Alonso González, Alberto; López Martínez, Carlos; Salembier Clairon, Philippe Jean (IEEE Press. Institute of Electrical and Electronics Engineers, 2012-02)
      Article
      Accés restringit per política de l'editorial
      In this paper,we propose the use of binary partition trees (BPT) to introduce a novel region-based and multi-scale polarimetric SAR (PolSAR) data representation. The BPT structure represents homogeneous regions in the ...

    • Filtering and segmentation of polarimetric SAR images with binary partition trees 

      Alonso González, Alberto; López Martínez, Carlos; Salembier Clairon, Philippe Jean (2010)
      Text en actes de congrés
      Accés obert
      A new multi-scale PolSAR data filtering technique, based on a Binary Partition Tree (BPT) representation of the data, is proposed. Different alternatives for the construction and the exploitation of the BPT for filtering ...

    • Forest parameter estimation in the Pol-InSAR context employing the multiplicative–additive speckle noise model 

      López Martínez, Carlos; Fabregas Canovas, Francisco Javier; Pipia, Luca (2011-09)
      Article
      Accés restringit per política de l'editorial
      This paper addresses the problem of speckle noise on single baseline polarimetric SAR interferometry (Pol-InSAR) on the basis of the multiplicative–additive speckle noise model. Considering this speckle noise model, a novel ...

    • Formación de imágenes radar de apertura sintética (SAR) de precisión mediante técnicas de retroproyección 

      Sensat Nogués, Mònica (Universitat Politècnica de Catalunya, 2015-05-13)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] Satellite, aircraft, drone or rail based on synthetic aperture radars (SAR) offer the opportunity to study landslides and changes occurred to the Earth through the processing of the signal received by the system. ...

    • FPGA based Radar acquisition and preprocessing unit 

      Blanco Caamaño, Ramon (Universitat Politècnica de Catalunya, 2020-07-15)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat
      In this dissertation, a study and a practical implementation of an acquisition and preprocessing unit are provided for the digitization and suitability of the radar signals. The hardware solution allows the digitization ...

    • Full polarimetric L-BAND SAR front end for UAV 

      Rendón Vélez, Simón (Universitat Politècnica de Catalunya, 2016-09)
      Treball Final de Grau
      Accés obert
      Aquest projecte detalla el disseny, desenvolupament i implementació d'un capçal RF polarimètric per banda L, amb l'objectiu d'embarcar-lo en un drone per aplicacions SAR. Concretament, el sistema soluciona el problema ...

    • Gb-SAR interferometry displacement measurements during dewatering in construction works : case of La Sagrera railway station in Barcelona, Spain 

      Serrano Juan, Alejandro; Vázquez Suñé, Enric; Montserrat, Oriol; Crosetto, Michele; Hoffmann Jauge, Christian; Ledesma Villalba, Alberto; Criollo, Rotman; Pujades, E; Velasco Mansilla, Domitila Violeta; García Gil, Alejandro; García Alcaraz, María del Mar (2016-04-29)
      Article
      Accés obert
      Construction processes require monitoring to ensure safety and to control the new and existing structures. Traditional monitoring is based on land surveys and geotechnical instruments and only allows for point-like ...

    • GEOSAR Mission: Orbit Determination Methods and Techniques 

      Fernandez Uson, Marc (Universitat Politècnica de Catalunya, 2016-05)
      Projecte/Treball Final de Carrera
      Accés obert
      Multiple applications such as land stability control, natural risks prevention or accurate numerical weather prediction models from water vapour atmospheric mapping would substantially benefit from permanent radar monitoring ...

    • Geosynchronous SAR focusing with atmospheric phase screen retrieval and compensation 

      Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Monti Guerneri, Andrea; Rocca, Fabio (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Article
      Accés restringit per política de l'editorial
      In this paper, a geosynchronous synthetic aperture radar (SAR) (GEOSAR) mission for atmospheric phase screen (APS) retrieval using a long coherent integration of pulses is analyzed. The nearly fixed position of the ...

    • Geosynchronous synthetic aperture radar for Earth continuous observation missions 

      Ruiz Rodon, Josep (Universitat Politècnica de Catalunya, 2014-11-20)
      Tesi
      Accés obert
      This thesis belongs to the field of remote sensing, particularly Synthetic Aperture Radar (SAR) systems from the space. These systems acquire the signals along the orbital track of one or more satellites where the transmitter ...

    • GRECO-SAR: An Orbital Polarimetric SAR Simulator of Deterministic Complex Targets for Vessel Classification Studies 

      Margarit Martín, Gerard; Mallorquí Franquet, Jordi Joan; Rius Casals, Juan Manuel; Sanz Marcos, Jesús (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-12-31)
      Article
      Accés obert
      This paper presents a synthetic aperture radar (SAR) simulator that is able to generate polarimetric SAR (POLSAR) and polarimetric inverse SAR data of complex targets. It solves the electromagnetic problem via high-frequency ...

    • Ground deformation analysis using basic products of the Copernicus ground motion service 

      Shahbazi, Saeedeh; Crosetto, Michele; Barra, Anna (2022-05-30)
      Article
      Accés obert
      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 ...

    • Ground movement classification using statistical tests over persistent scatterer interferometry time series 

      Mirmazloumi, Seyedmohammad; Wassie, Yismaw Abera; Antonio Navarro, José; Palamá, Riccardo; Monserrat Hernández, Oriol; Crosetto, Michele (Elsevier, 2022)
      Article
      Accés obert
      This study proposes modifications to an existing automatic classification method of Persistent Scatterers Interferometry (PSI) time series (TS) and a new procedure to classify ground movements into seven classes. We also ...

    • Ground moving target indication with synthetic aperture radars for maritime surveillance 

      Makhoul Varona, Eduardo (Universitat Politècnica de Catalunya, 2015-03-26)
      Tesi
      Accés obert
      The explosive growth of shipping traffic all over the World, with around three quarters of the total trade goods and crude oil transported by sea, has raised newly emerging concerns (economical, ecological, social and ...

    • Ground topography estimation on over forests considering polarimetric SAR interferometry 

      López Martínez, Carlos; Alonso González, Alberto; Fabregas Canovas, Francisco Javier; Papathanassiou, Kostantinos (2010)
      Text en actes de congrés
      Accés obert
      The work detailed in this paper analyzes the topographic phase retrieval process on forested areas by means of Polarimetric Interferometric SAR data. On the basis of the Random Volume over Ground scattering model, an ...

    • Ground topography retrieval on forested areas based on polarimetric SAR interferometry 

      López Martínez, Carlos; Fabregas Canovas, Francisco Javier; Alonso García, Alberto; Papathanassiou, Kostantinos (2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The work shown in this paper analyzes the topographic phase retrieval process on forested areas by means of Polarimetric Interferometric SAR (PolInSAR) data. On the basis of the Random Volume over Ground scattering model, ...

    • Ground-based polarimetric SAR interferometry for the monitoring of terrain displacement phenomena-part I: theoretical description 

      Iglesias González, Rubén; Aguasca Solé, Alberto; Fabregas Canovas, Francisco Javier; Mallorquí Franquet, Jordi Joan; Monells Miralles, Daniel; López Martínez, Carlos; Pipia, Luca (2015-03-01)
      Article
      Accés obert
      Ground-based synthetic aperture radar (SAR) (GB-SAR) sensors represent an effective solution for the monitoring of ground displacement episodes. Initially, the most GB-SAR sensors were based on vector network analyzers ...

    • Ground-based polarimetric SAR interferometry for the monitoring of terrain displacement phenomena-part II: applications 

      Iglesias González, Rubén; Aguasca Solé, Alberto; Fabregas Canovas, Francisco Javier; Mallorquí Franquet, Jordi Joan; Monells Miralles, Daniel; López Martínez, Carlos; Pipia, Luca (2015-03-01)
      Article
      Accés obert
      Urban subsidence and landslides are among the greatest hazards for people and infrastructure safety and they require an especial attention to reduce their associated risks. In this framework, ground-based synthetic aperture ...