Ara es mostren els items 1-13 de 13

  • Adaptive Digital Beam-Forming for High-Resolution Wide-Swath Synthetic Aperture Radar 

    Makhoul Varona, Eduardo (Universitat Politècnica de Catalunya, 2009-06-29)
    Projecte/Treball Final de Carrera
    Accés obert
    Realitzat a/amb:  Deutsches Zentrum für Luft-und Raumfahrt
    The thesis “Adaptive Digital Beam-Forming for High-Resolution Wide-Swath Synthetic Aperture Radar” is a project carried out in the Microwaves and Radar Institute (IHR) at the German Aerospace Center (DLR) The objective ...
  • A performance evaluation of SAR-GMTI missions for maritime applications 

    Makhoul Varona, Eduardo; Broquetas Ibars, Antoni; Ruiz Rodon, Josep; Zhan, Yu; Ceba Vega, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2015-05-01)
    Article
    Accés obert
    This paper proposes a new optimized multichannel synthetic aperture radar (SAR) configuration, based on receiving antennas with nonuniformly displaced phase centers, intended for ground moving target indication (GMTI) ...
  • Approach to velocity and acceleration measurement in the Bi-Directional SAR imaging mode 

    Mittermayer, Josef; Prats, Pau; Wollstadt, Steffen; Baumgartner, Stefan; López Dekker, Francisco J.; Broquetas Ibars, Antoni; Makhoul Varona, Eduardo; Krieger, Gerhard; Moreira, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents an initial analysis of the possibilities for velocity and acceleration m easurement with the Bi- Directional SAR imaging mode (BiDi). It comprises single satellite single path acquisitions as well ...
  • Evaluation of state-of-the-art GMTI techniques for future spaceborne SAR systems -simulation validation- 

    Makhoul Varona, Eduardo; Broquetas Ibars, Antoni; González, Oriol (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents an evaluation of the state-of-the-art Ground Moving Target Indication (GMTI) techniques in the frame of space-borne Synthetic Aperture Radar (SAR) for vessel detection by means of a flexible SAR-GMTI ...
  • Exploiting polarimetric TerraSAR-X data for sea clutter characterization 

    Makhoul Varona, Eduardo; López Martínez, Carlos; Broquetas Ibars, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 2016-01-01)
    Article
    Accés obert
    This paper presents a detailed characterization of sea/ocean clutter returns at X-band, imaged by TerraSAR-X (TSX) mission from the radiometric, statistical, and polarimetric standpoints. Different TSX data takes, covering ...
  • Fast simulation performance evaluation of spaceborne SAR-GMTI missions for maritime applications 

    Makhoul Varona, Eduardo; Zhan, Yu; Ceba Vega, Francisco; Broquetas Ibars, Antoni; Beaton, Alasdhair; Letterio, Federico; Tonetti, Stefania; Barbarossa, Sergio; di Lorenzo, Paolo; Maffei, Marco (VDE Conference Publications, 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents a flexible simulator for Ground Moving Target Indication (GMTI) in the frame of spaceborne Synthetic Aperture Radar (SAR) over maritime scenarios. The simulation tool provides GMTI performance metric ...
  • Ground moving target indication using multi-channel SAR with non-uniform displaced phase centers 

    Makhoul Varona, Eduardo; Broquetas Ibars, Antoni; Ruiz Rodon, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents an evaluation of a post-Doppler spacetime adaptive Processing (STAP) technique for non-uniformly displaced phase center receivers synthetic aperture radar (SAR). Both theoretical and simulation ...
  • Ground moving target indication with synthetic aperture radars for maritime surveillance 

    Makhoul Varona, Eduardo (Universitat Politècnica de Catalunya, 2015-03-26)
    Tesi
    Accés obert
    The explosive growth of shipping traffic all over the World, with around three quarters of the total trade goods and crude oil transported by sea, has raised newly emerging concerns (economical, ecological, social and ...
  • Internal calibration strategies for space-borne synthetic aperture radars with active phased array antennas 

    Makhoul Varona, Eduardo; Broquetas Ibars, Antoni; Closa Domínguez, Josep M.; Saameno, Paula (IEEE, 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper proposes an analytical formulation of the instrumental errors in multilevel hierarchic SAR architecture equipped with active phased array antennas. The basis of the study is the derivation of the so called ...
  • 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
    Accés obert
    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 ...
  • Nearly zero inclination geosynchronous SAR mission analysis with long integration time for earth observation 

    Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Makhoul Varona, Eduardo; Monti Guarnieri, Andrea; Rocca, Fabio (Institute of Electrical and Electronics Engineers (IEEE), 2014-10-01)
    Article
    Accés restringit per política de l'editorial
    In this paper, the performance of a nearly zero inclination and low eccentricity geosynchronous synthetic aperture radar (GEOSAR) mission for midlatitude (30 degrees-60 degrees) Earth observation is analyzed. The slow ...
  • 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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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 ...
  • Sea clutter statistical characterization using TerraSAR-X data 

    Makhoul Varona, Eduardo; Zhan, Yu; Broquetas Ibars, Antoni; Ruiz Rodon, Josep; Baumgartner, Stefan (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The paper presents a preliminary statistical evaluation of the sea clutter returns imaged by a spaceborne synthetic aperture radar (SAR) mission as TerraSAR-X. Two polarimetric data takes, Dual-polarized (Dual-Pol) and ...