Now showing items 77-96 of 113

  • 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 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
    Restricted access - publisher's policy
    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 ...
  • 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)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    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. ...
  • Prototipo de un dispositivo de transporte para equipos GPR 

    Borrell Fernández, Jordi (Universitat Politècnica de Catalunya, 2009-01-12)
    Master thesis (pre-Bologna period)
    Open Access
    El contingut d’aquest projecte es basa en el redisseny d’un dispositiu per al transport de un georadar. Es parteix d’un dispositiu ja dissenyat i s’estudia les mancances tècniques i de confort d’aquest. Seguidament es ...
  • El Radar : de dónde viene y hacia dónde va 

    Broquetas Ibars, Antoni (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1994)
    Article
    Open Access
  • Radar biestàtic sincronitzat per Hitchhiking 

    Pous i Sabadí, Carles; Aguasca Solé, Albert; Elias Fusté, Antoni; Broquetas Ibars, Antoni (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1993)
    Article
    Open Access
  • Radar en Banda W (94 GHz) para aplicaciones meteorológicas 

    Zhu, Yanfang (Universitat Politècnica de Catalunya, 2015-06)
    Bachelor thesis
    Open Access
    design the radar system which operates at 94GHz for measurements of clouds
  • Radiometric sensitivity computation in aperture synthesis interferometric radiometry 

    Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Torres Torres, Francisco (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1998-03-01)
    Article
    Open Access
    This paper is concerned with the radiometric sensitivity computation of an aperture synthesis interferometric radiometer devoted to Earth observation. The impact of system parameters and the use of simultaneous redundant ...
  • Radiometric Sensitivity Computation in Aperture Synthesis Interferometric Radiometry 

    Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Torres Torres, Francisco (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1998-03-31)
    Article
    Open Access
    This paper is concerned with the radiometric sensitivity computation of an aperture synthesis interferometric radiometer devoted to Earth observation. The impact of system parameters and the use of simultaneous redundant ...
  • Refined estimation of time-varying baseline errors in airborne SAR interferometry 

    Reigber, Andreas; Prats Iraola, Pau; Mallorquí Franquet, Jordi Joan (IEEE, 2006-01-31)
    Article
    Open Access
    The processing of airborne synthetic aperture radar (SAR) data requires a precise compensation of the deviations of the platform movement from a straight line. This is usually carried out by recording the trajectory with ...
  • Resolution in evaluation of structural elements by using ground-penetrating radar 

    Pérez Gracia, María de la Vega (2009-10-29)
    Conference lecture
    Open Access
    Ground-penetrating radar (GPR) is a non-invasive geophysical technique widely used in civil engineering, archaeology and shallow geology. Radar images of the inner media provides information about inner.
  • Resonant pulse-shaping power supply for radar transmitters 

    Bell Rodriguez, Miguel Victoria Ramo; Roberg, Michael; Pack, Riley; Garcia Fernandez, Pablo; Alarcón Cot, Eduardo José; Popoviç, Zoya; Maksimovic, Dragan (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    The final radiofrequency power amplifier (PA) of a radar transmitter module is a large factor in system efficiency. Typical radar transmitter signals are frequency-modulated with constant-amplitude pulse envelopes in order ...
  • Results on spatial-temporal atmospheric phase screen retrieval from long-term GEOSAR acquisition 

    Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Makhoul Varona, Eduardo; Monti Guarnieri, Andrea; Rocca, Fabbio (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    In this paper, a high integration gain GEOSAR mission for Earth imaging is presented. The spatial-temporal atmospheric decorrelation issues of a long integration time GEOSAR mission must be carefully studied. The ...
  • RF interference analisys in aperture synthesis interferometric radiometers: Application to L-band MIRAS instrument 

    Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Bará Temes, Francisco Javier; Capdevila Vives, Joan (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-03-31)
    Article
    Open Access
    Current spaceborne radiometers do not achieve the required spatial resolution demanded by the scientific community due to antenna-size technological limitations. In recent years, several space agencies have been studying ...
  • Robust array configuration for a microwave interferometric radiometer: application to the geoSTAR project 

    Torres Torres, Francisco; Tanner, Alan B.; Brown, S. T.; Lambrigsten, Bjorn H. (IEEE Institute of Electrical and Electronics Engineers, 2007-01-31)
    Article
    Open Access
    The Geostationary Synthetic Thinned Array Radiometer represents a promising new approach to microwave atmospheric sounding from geostationary orbit based on passive interferometry. One of the major concerns about the ...