Ara es mostren els items 135-154 de 199

  • Obtención de imágenes ISAR de blancos móviles 

    Puente Baliarda, Carles; Broquetas Ibars, Antoni; Jofre Roca, Lluís (1992)
    Text en actes de congrés
    Accés obert
    A new method for motion compensation has been developed for radar imaging of moving targets (ISAR). Phase shifts (due to target motion) among adjacent pulses from a STEPPED FREQUENCY signal, are removed with a parabolic ...
  • Obtención de mapas de detección en escenarios marítimos mediante simulación paramétrica en sistemas SAR-MTI 

    Bertomeu Rojas, Xavier (Universitat Politècnica de Catalunya, 2014-04-28)
    Projecte/Treball Final de Carrera
    60 months embargo
    [ANGLÈS] This project is a small part of a larger project called SIMTISYS. The purpose of SIMTISYS is to simulate the behavior of a synthetic aperture radar with moving target indication (MTI) capabilities in maritime ...
  • On the amount of information content in microwave radiometry for wet delay correction 

    Gual de Torrellas, José María; Camps Carmona, Adriano José (Aalto University, 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The scope of this work is the determination of the set of optimum frequencies to be used in the companion microwave radiometers in future synthetic aperture radar altimeters, to provide higher spatial resolution of the ...
  • On the use of the l(2)-norm for texture analysis of polarimetric SAR data 

    Deng, xinping; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2016-11-01)
    Article
    Accés obert
    In this paper, the use of the l2-norm, or Span, of the scattering vectors is suggested for texture analysis of polarimetric synthetic aperture radar (SAR) data, with the benefits that we need neither an analysis of the ...
  • On-board phase and modulus calibration of large aperture synthesis radiometers: study applied to miras. 

    Torres Torres, Francisco; Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Ferrero Pintor, Roberto (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-07-01)
    Article
    Accés obert
    On-board calibration of bidimensional aperture synthesis radiometers with a large number of antennas by the standard correlated noise injection method is technologically very critical because of the stringent requirements ...
  • Optical Doppler shift with structured light 

    Belmonte Molina, Aniceto; Pérez Torres, Juan (2011-11-15)
    Article
    Accés obert
    When a light beam with a transverse spatially varying phase is considered for optical remote sensing, in addition to the usual longitudinal Doppler frequency shift of the returned signal induced by the motion of the scatter ...
  • Optimización de detectores no paramétricos aplicados a radar 

    Mariño Acebal, José Bernardo; Figueiras Vidal, Aníbal R.; Sanz González, José Luis (1983)
    Text en actes de congrés
    Accés obert
    En esta comunicación se introduce un nuevo esquema de detector no paramétrico para aplicación Radar y se discuten brevemente sus prestaciones. En el 1er apartado se justifica la aparición de los detectores no paramétricos ...
  • Optimización de un Centro de Fusión CFAR para Sistemas Distribuidos RADAR 

    Ortega Villasclaras, Pablo Rafael; Elias Fusté, Antonio (1991)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Distributed detection theory is widely used in surveillance systems that recquire a large area of coverage and a large number of targets under consideration. In this paper an optimization algorithm for distributed systems ...
  • PARSAR: A SAR processor implemented in a cluster of workstations 

    Maretínez, A; Fraile, F; Mallorquí Franquet, Jordi Joan; Nogueira, L; Gabaldà, J; Broquetas Ibars, Antoni; González Colás, Antonio María (ESA Publications Division, 1997)
    Text en actes de congrés
    Accés obert
    A parallel SAR processor is presented in this paper. The target configuration is a cluster of UNIX workstations, available in most user sites. This fact allows to obtain an increased computing performance without the need ...
  • Performance assessment of a homodyne laser radar for surface displacement monitoring 

    Rodríguez Gómez, Alejandro Antonio; Comerón Tejero, Adolfo; Mesalles Nalda, Eloy (Spie-Int Society Optical Engineering, 2001-12-31)
    Article
    Accés obert
  • Phase quality optimization in Orbital Differential SAR Interferometry with fully polarimetric data 

    Monells Miralles, Daniel; Iglesias González, Rubén; Mallorquí Franquet, Jordi Joan; Fabregas Canovas, Francisco Javier; López Martínez, Carlos (IEEE, 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Orbital Differential SAR Interferometry (DInSAR) is a well-known technique to retrieve terrain deformation phenomena from wide areas with high resolution. Historically its application has been limited to single polarization ...
  • Phased-Array Antenna Calibration and Cross-polarization improvement of an X-band Weather Radar 

    Masalias Huguet, Gerard (Universitat Politècnica de Catalunya, 2015-10)
    Projecte/Treball Final de Carrera
    Accés obert
    Dual-polarized phased-array radars used for weather retrieval purposes is an emerging tendency over the last few years. The dual-polarization technology provides an expanded range of weather products and the reliability ...
  • Polarimetric coherence optimization for interferometric differential applications 

    Pipia, Luca; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto; López Martínez, Carlos; Mallorquí Franquet, Jordi Joan (2009)
    Text en actes de congrés
    Accés obert
    In this paper, the potentials of polarimetric coherenceoptimization techniques for differential interferometric SAR (DInSAR) applications are examined. For this purpose, the cutting-edge approaches available in the ...
  • Polarimetric radar interferometry for improved mine detection and surface clutter rejection 

    Sagués Piella, Lluís; López Márquez, Miguel Ángel; Fortuny, Joaquim; Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni; Sieber, Alois (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-06-30)
    Article
    Accés obert
    A recently developed technique, polarimetric radar interferometry, is applied to tackle the problem of the detection of buried objects embedded in surface clutter. An experiment with a fully polarimetric radar in an anechoic ...
  • Polarimetric speckle noise effects in quantitative physical parameters retrieval 

    López Martínez, Carlos; Hajnsek, I.; Lee, J. S.; Pottier, Eric; Fabregas Canovas, Francisco Javier (IEE-INST ELEC ENG, 2006-06-30)
    Article
    Accés obert
    Quantitative estimation of physical parameters of the Earth's surface is currently an active area of research. Multidimensional synthetic aperture radar (SAR) systems appear in this framework as a tool capable of performing ...
  • Polarimetric techniques for SAR contrast and resolution enhancement 

    López Martínez, Carlos; Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni; Krogager, E (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Text en actes de congrés
    Accés obert
  • Polarimetric temporal analysis of urban environments with a ground-based SAR 

    Pipia, Luca; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2013-04)
    Article
    Accés restringit per política de l'editorial
    Revisiting time constitutes a key constraint for continuous monitoring activities based on space- and airborne synthetic aperture radar (SAR) acquisitions. Conversely, the employment of terrestrial platforms overcomes ...
  • Precise geometry simulation of interferometric SAR signal for air- and spaceborne sensors 

    Bara, M; Broquetas Ibars, Antoni; Closa Domínguez, Josep M. (IEEE Piscataway, 2000)
    Text en actes de congrés
    Accés obert
    A complete interferometric synthetic aperture radar (SAR) simulator has been developed. It achieves precise results by using geodetic models to represent the Earth's shape, and considering SAR effects such as range migration, ...
  • Procesado de imágenes SAR (Radar de Apertura Sintética) aerotransportado con compensación de movimiento 

    Bara Iniesta, Marc Antoni; Javier, Cachón; Broquetas Ibars, Antoni; Carlos, Juan Crespo (Iberdrola Instituto Tecnológico, 1998)
    Text en actes de congrés
    Accés obert
    An operational processor to obtain high resolution radar images of the Earth surface from an airborne platform is presented. The paper describes the problem, its geometry and the steps to obtain a reflectivity image from ...
  • Prospección con radar de subsuelo para mejorar la nanozonificación sísmica de ciudades densas: aplicación en grandes calles de Barcelona 

    Muñoz Alba, Mercedes (Universitat Politècnica de Catalunya, 2011-10-21)
    Projecte/Treball Final de Carrera
    Accés restringit per decisió de l'autor
    Los estudios de zonificación sísmica son una de las evaluaciones necesarias para analizar riesgo sísmico. Mediante los mismos se definen zonas en las cuales la respuesta del suelo al paso de las ondas sísmicas es similar. ...