Now showing items 21-40 of 71

  • 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
    Open Access
    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 ...
  • 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
    Open Access
    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 topography estimation on over forests considering polarimetric SAR interferometry 

    López Martínez, Carlos; Alonso González, Alberto; Fabregas Canovas, Francisco Javier; Papathanassiou, Kostantinos (2010)
    Conference report
    Open Access
    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)
    Conference report
    Restricted access - publisher's policy
    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, ...
  • High-speed focusing algorithm for circular synthetic aperture radar (C-SAR) 

    Bara Iniesta, Marc Antoni; Sagués Piella, Lluís; Paniagua Nicolás, Fernando; Broquetas Ibars, Antoni; Fabregas Canovas, Francisco Javier (IEE-INST ELEC ENG, 2000-04-30)
    Article
    Open Access
    A new algorithm is presented which is capable of generating very fast high-resolution images for circular synthetic aperture radar (C-SAR) systems. Its main characteristic is that it allows the processing of data from such ...
  • Identificación selectiva de centros de dispersion radar utilizando tecnicas ISAR 

    Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni; Jofre Roca, Lluís (1991)
    Conference report
    Open Access
    This paper presents an ISAR technique which is able to identify the scattering mechanisms in the target structure wich are responsible of each significant lo be of the RCS vs. angle diagram. The technique is based on a ...
  • Impact analysis of wind turbines blockage on doppler weather radar 

    Belmonte Molina, Aniceto; Fabregas Canovas, Francisco Javier (2010)
    Conference report
    Open Access
  • Impact of wind-induced scatterers motion on GB-SAR imaging 

    Lort Cuenca, Marc; Aguasca Solé, Alberto; López Martínez, Carlos; Fabregas Canovas, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 2018-08-13)
    Article
    Open Access
    Ground-based synthetic aperture radar (GB-SAR) sensors represent a cost-effective solution for change detection and ground displacement assessment of small-scale areas in real-time early warning applications. GB-SAR systems ...
  • Indoor experiments on polarimetric SAR interferometry 

    Sagués Piella, Lluís; López-Sánchez, Juan Manuel; Fortuny, Joaquim; Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni; Sieber, A. J. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-03-31)
    Article
    Open Access
    A coherence optimization method, which makes use of polarimetry to enhance the quality of SAR interferograms, has been experimentally tested under laboratory conditions in an anechoic chamber. By carefully selecting the ...
  • Interpretación de imágenes obtenidas por el e.r.s.-1 mediante un dispersómetro polarimétrico 

    Porrata-Dòria i Yagüe, Ramir de; Broquetas Ibars, Antoni; Fabregas Canovas, Francisco Javier (1995-06)
    Article
    Open Access
    Un dispersómetro polarimétrico es un radar de baja potencia y corto alcance capaz de medir la matriz de dispersión de la superficie que esté iluminado. “TERPBA” (TErrestrial Radar Equipment for Scattering Analysis) es un ...
  • Laboratory experiments of polarimetric radar interferometry: DEM generation and vegetation height estimation 

    Fortuny Guasch, Joaquim; Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Conference report
    Open Access
    A coherence optimization method, which makes use of polarimetry to enhance the quality of the interferograms, has been experimentally tested under laboratory conditions in an anechoic chamber. The experiments have proved ...
  • La carta de Smith (Radiació i Ones Guiades) 

    Fabregas Canovas, Francisco Javier; Torres Torres, Francisco; Miranda Mendoza, Carlos (2013-09-27)
    External research report
    Open Access
  • La gran lluita contra el mar (història del cable trasatlàntic) 

    Fabregas Canovas, Francisco Javier; Torres Torres, Francisco; Romeu Robert, Jordi (2014-02-12)
    External research report
    Open Access
  • Link-Budget: la missió Interestel·lar Voyager 

    Fabregas Canovas, Francisco Javier; Torres Torres, Francisco; Romeu Robert, Jordi (2013-12-10)
    External research report
    Open Access
  • Maximum-likelihood estimation of specific differential phase and attenuation in rain 

    Santalla, V Del Rio; Yahia, M M Antar; Fabregas Canovas, Francisco Javier (IEEE Press. Institute of Electrical and Electronics Engineers, 2003-12)
    Article
    Restricted access - publisher's policy
    Precise estimation of propagation parameters in precipitation media is of interest to improve the performance of communications systems and in remote sensing applications. In this paper, we present maximum-likelihood ...
  • Maximum-likelihood estimation of specific differential phase and attenuation in rain 

    Santalla del Rio, V.; Antar, Yahia M. M.; Fabregas Canovas, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-12-31)
    Article
    Open Access
  • Modeling and reduction of SAR interferometric phase noise in the wavelet domain 

    López Martínez, Carlos; Fabregas Canovas, Francisco Javier (IEEE Press. Institute of Electrical and Electronics Engineers, 2002-12)
    Article
    Open Access
    This paper addresses the problem of interferometric phase noise reduction in synthetic aperture radar interferometry. A new phase noise model in the complex domain is introduced and validated by using both simulated and ...
  • Multidimensional speckle noise model 

    López Martínez, Carlos; Fabregas Canovas, Francisco Javier; Pottier, Eric (Hindawi Publishing Corporation., 2005-12-31)
    Article
    Open Access
  • Multi-technique approach to rockfall monitoring in the Montserrat massif (Catalonia, NE Spain) 

    Janeras, Marc; Jara Salvador, José Antonio; Royan, Manuel J.; Vilaplana, Joan Manuel; Aguasca Solé, Alberto; Fabregas Canovas, Francisco Javier; Gili Ripoll, José Antonio; Buxó, Pere (2017-03-09)
    Article
    Open Access
    Montserrat Mountain is located near Barcelona in Catalonia, in the northeast of Spain, and its massif is formed by conglomerate interleaved by siltstone/sandstone with steep slopes very prone to rockfalls. The increasing ...
  • Perturbation analysis of eigenvector-based target decomposition theorems in radar polarimetry 

    López Martínez, Carlos; Alonso González, Alberto; Fabregas Canovas, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Article
    Restricted access - publisher's policy
    A novel analysis of the statistics of the eigendecomposition of the coherency matrix and the H/A/a¯ parameters of polarimetric synthetic aperture radar data is addressed. The objective is to overcome previous approaches ...