Now showing items 1-18 of 18

  • Advanced radar geosynchronous observation system: ARGOS 

    Monti Guarnieri, Andrea; Broquetas Ibars, Antoni; Recchia, Andrea; Rocca, Fabio; Ruiz Rodon, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2015-07-01)
    Article
    Open Access
    The Advanced Radar Geosynchronous Observation System is proposed to be a multiple-input–multiple-output synthetic aperture radar (SAR) system hosted on a swarm of minisatellites in quasi-geostationary orbits. The system ...
  • Analysis and evaluation of Terrain Observation by Progressive Scans (TOPSAR) mode in Synthetic Aperture Radar 

    Ruiz Rodon, Josep (Universitat Politècnica de Catalunya, 2009)
    Master thesis (pre-Bologna period)
    Open Access
    Synthetic Aperture Radar (SAR) is a technique used in radar (RAdio Detection And Ranging) [1] systems to get high resolution images which are impossible to obtain with a conventional radar. This method allows us to acquire ...
  • An efficient method for the azimuth compression of geosynchronous SAR data through sub-apertures processing 

    Belotti, Michele; Broquetas Ibars, Antoni; Leanza, Antonio; Monti Guarnieri, Andrea; Recchia, Andrea; Rocca, Fabio; Ruiz Rodon, Josep; Tebaldini, Stefano (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    We propose an efficient method for the azimuth compression and Atmospheric Phase Screen estimation of Geosynchronous SAR data. The method is based on the iterative processing of sub-apertures of increasing size, allowing ...
  • 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
    Open Access
    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) ...
  • Assesment of atmospheric phase screen impact on Geosynchronous SAR 

    Recchia, Andrea; Monti Guarnieri, Andrea; Broquetas Ibars, Antoni; Ruiz Rodon, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    The paper evaluates the effects of Atmospheric Phase Screen on focused Geosynchronous SAR data. We derive theoretical models for the resolution, the interferometric de-correlation and the induced clutter in presence of an ...
  • Atmospheric phase screen retrieval from GEOSAR long term acquisition 

    Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Monti Guarnieri, Andrea; Rocca, Fabio (2012)
    Conference report
    Restricted access - publisher's policy
    In this paper, a GEOSAR mission with typical LEOSAR parameters but longer integration time to increase the received power is presented. Such systems can provide images of large areas with continuous monitoring. The revisit ...
  • Bistatic geosynchronous SAR for land and atmosphere continuous observation 

    Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Monti Guarnieri, Andrea; Recchia, Andrea (VDE Conference Publications, 2014)
    Conference lecture
    Restricted access - publisher's policy
    In this paper the bistatic SAR observation from low-eccentric nearly zero inclined geosynchronous orbits (GEOSAR) is studied. Two operation frequencies have been analysed with different compromises between spatial resolution ...
  • Design of a geosynchronous SAR system for water-vapour maps and deformation estimation 

    Monti Guarnieri, Andrea; Perletta, Luca; Rocca, Fabio; Scapin, Diego; Tebaldini, Stefano; Broquetas Ibars, Antoni; Ruiz Rodon, Josep (European Space Agency (ESA), 2011)
    Conference report
    Restricted access - publisher's policy
    In this paper, we propose a geosynchronous SAR concept that makes use of dual frequencies to achieve WIDE and SPOT coverage, aiming at continuous monitoring of deformation and generation of ...
  • Geosynchronous SAR focusing with atmospheric phase screen retrieval and compensation 

    Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Monti Guerneri, Andrea; Rocca, Fabio (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Article
    Restricted access - publisher's policy
    In this paper, a geosynchronous synthetic aperture radar (SAR) (GEOSAR) mission for atmospheric phase screen (APS) retrieval using a long coherent integration of pulses is analyzed. The nearly fixed position of the ...
  • Geosynchronous synthetic aperture radar for Earth continuous observation missions 

    Ruiz Rodon, Josep (Universitat Politècnica de Catalunya, 2014-11-20)
    Doctoral thesis
    Open Access
    This thesis belongs to the field of remote sensing, particularly Synthetic Aperture Radar (SAR) systems from the space. These systems acquire the signals along the orbital track of one or more satellites where the transmitter ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • Impact of clutter decorrelation on Geosynchronous SAR 

    Recchia, Andrea; Monti Guarnieri, Andrea; Broquetas Ibars, Antoni; Ruiz Rodon, Josep (VDE Conference Publications, 2014)
    Conference report
    Restricted access - publisher's policy
    We discuss the effects of the clutter on a Geosynchronous SAR system exploiting long integration times (from minutes to hours) to counteract for spread losses and increase azimuth resolution. Only stable targets will be ...
  • Internal clutter motion impact on the long integration GEOSAR acquisition 

    Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Makul, Eduardo; Monti Guarnieri, Andrea; Recchia, Andrea (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    In this paper, the impact of the internal clutter motion in GEOSAR acquisitions is analyzed. A nearly zero inclination with low eccentricity geosynchronous orbit is considered and, therefore, long integration, in order of ...
  • 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
    Restricted access - publisher's policy
    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)
    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 ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • Signal-to-noise ratio equalization for TOPSAR mode using a nonuniform steering rate 

    Ruiz Rodon, Josep; Broquetas Ibars, Antoni; González Arbesú, José María; Closa Domínguez, Josep M.; Labriola, M (2011-09-15)
    Article
    Restricted access - publisher's policy
    In this letter, an optimized scanning in terrain observation by progressive scan synthetic aperture radar (TOPSAR) mode is studied. A nonuniform steering rate of the radar array antenna in the along-track direction is ...
  • Study on the feasibility of geosynchronous satellites for synthetic aperture radar applications 

    Ruiz Rodon, Josep (Universitat Politècnica de Catalunya, 2011-05-13)
    Master thesis
    120 months embargo
    Català: Un complet anàlisi sobre la viabilitat dels satèl.lits geosíncrons per l'adquisició de dades SAR es presenta en aquesta tesis. L'objectiu d'una missió SAR Geosíncrona és la obtenció d'imatges SAR utilitzant el ...