Now showing items 108-127 of 171

  • Ku Band GB-SAR system integration and validation 

    Palomas Riera, Clàudia (Universitat Politècnica de Catalunya, 2015-07-21)
    Bachelor thesis
    Open Access
    This paper contains full detailed the process of calibration of the radar system with its measurements
  • Laboratory characterization of a GPR antenna for high-resolution testing: radiation pattern and vertical resolution 

    Pérez Gracia, María de la Vega; Capua, Daniel di; González Drigo, José Ramón; Pujades Beneit, Lluís (2009-06)
    Article
    Restricted access - publisher's policy
    High-resolution ground-penetrating radar (GPR) evaluations of structures are usually carried out using antennas with high nominal centre frequencies (between 1 and 2GHz). A comprehensive characterization of such an antenna ...
  • Landslide monitoring with spotlight TerraSAR-X DATA 

    Iglesias González, Rubén; Monells Miralles, Daniel; Centolanza, Giuseppe (IEEE, 2012)
    Conference report
    Restricted access - publisher's policy
    This paper aims to demonstrate that radar-based remote sensing techniques can be as effective as the conventional geotechnical ones for the detection and monitoring of well suited areas. Many of the high mountain ...
  • Linear and nonlinear terrain deformation maps from a reduced set of interferometric SAR images 

    Mora Sacristan, Óscar; Mallorquí Franquet, Jordi Joan; Broquetas Ibars, Antoni (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-10-31)
    Article
    Open Access
    In this paper, an advanced technique for the generation of deformation maps using synthetic aperture radar (SAR) data is presented. The algorithm estimates the linear and nonlinear components of the displacement, the error ...
  • Medida de sección recta radar con onda esférica en campo próximo 

    Broquetas Ibars, Antoni; Jofre Roca, Lluís; Cardama Aznar, Ángel (1992)
    Conference report
    Open Access
    The paper presents a new Inverse Synthetic Aperture Radar (ISAR) algorithm intended for Radar Cross Section (RCS) measurement from scattering fields. The method is based on a spherical wave near-field illumination of the ...
  • Modeling fast boat motion impact on satellite SAR MTI systems 

    Ceba Vega, Francisco; Makhoul Varona, Eduardo; Broquetas Ibars, Antoni; Zhan, Yu; Beaton, Alasdhair (2015-10-01)
    Article
    Open Access
    This letter analyzes the problems of imaging small and fast boats with synthetic aperture radar (SAR), which may experience severe defocusing and/or smearing. This situation is encountered, inter alia, in ocean traffic ...
  • Non-parametric serial decision fusion 

    Elias Fusté, Antonio; Broquetas Ibars, Antoni; Castro Fouz, R. (1990)
    Conference report
    Open Access
  • Obtención de imágenes ISAR de blancos móviles 

    Puente Baliarda, Carles; Broquetas Ibars, Antoni; Jofre Roca, Lluís (1992)
    Conference report
    Open Access
    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)
    Master thesis (pre-Bologna period)
    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-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
    Open Access
    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
    Open Access
    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)
    Conference report
    Open Access
    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)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • 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
    Open Access
  • 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)
    Conference report
    Restricted access - publisher's policy
    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)
    Master thesis (pre-Bologna period)
    Open Access
    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)
    Conference report
    Open Access
    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
    Open Access
    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
    Open Access
    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)
    Conference report
    Open Access