Exploració per tema "Radar"

Ara es mostren els items 10-29 de 322

    • A Novel Algorithm for Ship Detection in SAR Imagery Based on the Wavelet Transform 

      Tello Alonso, Mª Victoria; López Martínez, Carlos; Mallorquí Franquet, Jordi Joan (IEEE, 2005-04-30)
      Article
      Accés obert
      Carrying out an effective control of fishing activities is essential to guarantee a sustainable exploitation of sea resources. Nevertheless, as the regulated areas are extended, they are difficult and time consuming to ...

    • A novel linear feature detector for SAR images 

      He, Chu; Liao, Z.X.; Yang, Fang; Deng, Xinping; Liao, M.S. (2012-11-12)
      Article
      Accés obert
      A new linear feature detector for synthetic aperture radar (SAR) images is presented in this article by embedding a three-region filter into the wedgelet analysis framework. One of its main features is that it can detect ...

    • A novel strategy for radar imaging based on compressive sensing 

      Tello Alonso, Mª Victoria; López Dekker, Francisco J.; Mallorquí Franquet, Jordi Joan (2008)
      Text en actes de congrés
      Accés obert
      This paper aims at introducing the recent theory of compressive sensing to radar imaging systems in order to retrieve the imaged scene with better resolution and a reduced amount of collected samples. As a result of ...

    • A persistent scatterer interferometry procedure to monitor urban subsidence 

      Crosetto, Michele; Monserrat, Oriol; Barra, Anna; Cuevas-González, Maria; Krishnakumar, Vrinda; Mróz, Marek; Crippa, Bruno (2019)
      Text en actes de congrés
      Accés obert
      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 ...

    • A polarimetric ultra-wide band field scatterometer 

      Broquetas Ibars, Antoni; Fabregas Canovas, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 1995)
      Text en actes de congrés
      Accés obert
      “TERESA” (Terrestrial Radar Equipment for Scattering Analysis) is a ground-based, fully polarimetric scatterometer operative in the S, C, X, and Ku bands. It has been designed to obtain the complete backscattering matrix ...

    • A pulsed carrier recovery using a discrete conception of the PLL 

      Aguasca Solé, Alberto; Broquetas Ibars, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 1992)
      Text en actes de congrés
      Accés obert
      A bistatic radar system requires accurate synchronization between the transmitter and the remote receiver in order to achieve a correct coherent target detection and positioning. An unlinked receiver carrier phase/frequency ...

    • A review and test of shoreline extraction techniques 

      Angelini, Riccardo; Angelats Company, Eduard; Luzi, Guido; Ribas Prats, Francesca; Masiero, Andrea; Mugnai, Francesco (2023-05-25)
      Article
      Accés obert
      Shoreline represents the boundary between land and sea, and its accurate extraction is of utmost importance because of the economic and ecological value of coastal areas. Nowadays, satellite remote sensing is widely used ...

    • A Small Baseline DIFSAR Approach for Investigating Deformations on Full Resolution SAR Interferograms 

      Lanari, Ricardo; Mora Sacristan, Óscar; Manunta, Michele; Mallorquí Franquet, Jordi Joan; Berardino, P.; Sansoti, Eugenio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-07-31)
      Article
      Accés obert
      This paper presents a differential synthetic aperture radar (SAR) interferometry (DIFSAR) approach for investigating deformation phenomena on full-resolution DIFSAR interferograms. In particular, our algorithm extends ...

    • A suboptimum rank test for radar detection 

      Sanz González, José Luis; Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo (Universitat Politècnica de Catalunya (UPC), 1983)
      Text en actes de congrés
      Accés obert
      In this communication, a new nonparametric rank scheme is in traduced for Radar application and its performance briefly analyzed. The proposed scheme has a suboptimum character, since it is introduce as a simplification ...

    • A temporal phase coherence estimation algorithm 

      Zhao, Feng; Mallorquí Franquet, Jordi Joan (VDE Conference Publications, 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Pixel selection is a critical procedure in DInSAR processing. In this paper a new temporal phase coherence (TPC) estimation algorithm is proposed for the pixel selection. TPC is calculated based on the estimated interferometric ...

    • A two-dimensional doppler-radiometer for earth observation 

      Camps Carmona, Adriano José; Swift, Calvin T. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-07-31)
      Article
      Accés obert
      Compared to synthetic aperture radars (SARs), the angular resolution of microwave radiometers is quite poor. Traditionally, it has been limited by the physical size of the antenna. However, the angular resolution can be ...

    • A4CAT. A plataform for weather-related risk events management 

      Boota, Adnan (Universitat Politècnica de Catalunya, 2020-06)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   HYDS (Hydrometeorological Innovate Solutions)
      In the framework of the EU funded research project under the H2020 framework programme ANYWHERE (Enhancing emergency management and response to extreme weather and climate events) a system to integrate both hazard and ...

    • Accuracy assessment of SAR interferometry using the ERS-1 

      Broquetas Ibars, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 1995)
      Text en actes de congrés
      Accés obert
      A SAR raw data simulator and a SAR processor are used as a tool for performance assessment of SAR interferometry algorithms like the multi-baseline and multifrequency. Traditional algorithms have also been tested with real ...

    • Accurate numerical modeling of the TARA reflector system 

      Heldring, Alexander; Rius Casals, Juan Manuel; Ligthart, Leo P.; Cardama Aznar, Ángel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-07-31)
      Article
      Accés obert
      The radiation pattern of the large parabolic reflectors of the Transportable Atmospheric RAdar system (TARA), developed at Delft University of Technology, has been accurately simulated. The electric field integral ...

    • Accurate, grid-robust and versatile combined-field discretization for the electromagnetic scattering analysis of perfectly conducting targets 

      Úbeda Farré, Eduard; Sekulic, Ivan; Rius Casals, Juan Manuel; Heldring, Alexander (2020-04-15)
      Article
      Accés obert
      Recent implementations of the Electric-Field Integral Equation (EFIE) for the electromagnetic scattering analysis of perfectly conducting targets rely on the electric current expansion with the monopolar-RWG basis functions, ...

    • Active signal repeater for interferometric precise orbit determination 

      Garcia Monterrubio, Berta (Universitat Politècnica de Catalunya, 2021-07-27)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat

    • ADS-B radar system for data gathering and real time air traffic monitoring 

      Algar Creus, Eduard (Universitat Politècnica de Catalunya, 2023-06-07)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      This thesis will aim to design and implement an ADS-B integral and distributed system for detecting aircrafts broadcasts messages. Those messages will be processed and stored in a SQL database the project will rely on an ...

    • Advanced radar geosynchronous observation system: ARGOS 

      Monti Guarnieri, Andrea; Broquetas Ibars, Antoni; Recchia, Andrea; Rocca, Fabio; Ruiz Rodon, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2015-07-01)
      Article
      Accés obert
      The Advanced Radar Geosynchronous Observation System is proposed to be a multiple-input–multiple-output synthetic aperture radar (SAR) system hosted on a swarm of minisatellites in quasi-geostationary orbits. The system ...

    • Algoritmo interferométrico para un sistema radar de apertura sintética circular de corto alcance 

      Sagués Piella, Lluís; Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni (1997)
      Text en actes de congrés
      Accés obert
      This paper presents an interferometric algorithm capable of working with SAR images obtained from measurements carried out with antennas that describe a circular trajectory. The antennas are positioned on a vertical mast ...

    • Alternative processing for micro rain radar (MRR) observations 

      Garcia Benadí, Albert; Bech, Joan; González Herrero, Sergi; Río Fernandez, Joaquín del (2018)
      Comunicació de congrés
      Accés obert
      The most common function of weather radars is to provide a description of the precipitation field, typically in four dimensions: temporal evolution of a 3D field, including characteristics of precipitation and rainfall ...