Now showing items 21-40 of 107

  • Denormalization of visibilities for in-orbit calibration of interferometric radiometers 

    Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Beraza Robledano, Santiago; Gutiérrez, C.; Martín Neira, Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-10-31)
    Article
    Open Access
    This paper reviews the relative calibration of an interferometric radiometer taking into account the experimental results of the first batch of receivers developed in the frame of the European Space Agency's Soil Moisture ...
  • Denormalization of visibilities for in-orbit calibration of interferometric radiometers 

    Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Beraza Robledano, Santiago; Martín Neira, Manuel; Gutiérrez, C. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-10-31)
    Article
    Open Access
    This paper reviews the relative calibration of an interferometric radiometer taking into account the experimental results of the first batch of receivers developed in the frame of the European Space Agency's Soil Moisture ...
  • Design of single shaped reflector antennas for synthesis of shaped contour beams using genetic algorithms 

    Vall-Llossera Ferran, Mercedes Magdalena; Rius Casals, Juan Manuel; Duffo Ubeda, Núria; Cardama Aznar, Ángel (JOHN WILEY & SONS INC, 2000-12-31)
    Article
    Open Access
    A genetic algorithm (GA) has been developed for designing single-shaped reflector antennas for the synthesis of shaped contour beams. The graphical processing technique is used in order to obtain the antenna radiation ...
  • Design of single shaped reflector antennas for synthesis of shaped contour beams using genetic algorithms 

    Vall-Llossera Ferran, Mercedes Magdalena; Rius Casals, Juan Manuel; Duffo Ubeda, Núria; Cardama Aznar, Ángel (2000-12)
    Article
    Restricted access - publisher's policy
    A genetic algorithm (GA) has been developed for designing single-shaped reflector antennas for the synthesis of shaped contour beams. The graphical processing technique is used in order to obtain the antenna radiation ...
  • Design of single shaped reflector antennas with a single feed applying genetic algorithms and graphical processing techniques 

    Vall-Llossera Ferran, Mercedes Magdalena; Rius Casals, Juan Manuel; García, M; Duffo Ubeda, Núria (SEE, 1998)
    Conference report
    Open Access
    A genetic algorithm GA has been de ( ) eloped for designing single-shaped reflector antennas for the synthesis of shaped contour beams. The graphical processing technique is used in order to obtain the antenna radiation ...
  • Difraccion y radiacion electromagnetica de estructuras microstrip finitas mediante el metodo de los elementos de contorno 

    Luis, P; Duffo Ubeda, Núria; Cruellas Ibarz, Juan Carlos (Universidad de Valladolid, 1995)
    Conference report
    Open Access
  • Dynamic range and linearity tradeoff in detectors for interferometric radiometers 

    Torres Torres, Francisco; Duffo Ubeda, Núria; Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena (2003-12)
    Article
    Open Access
    The dynamic range and error performance of the diode power detector used to denormalise the digital correlations in interferometric radiometers is analysed by means of a second-order model of the diode response. This ...
  • End-to-end Simulator of 2-D Interferometric Radiometry 

    Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Zapata González, Miguel; Marcos, Fernando; Martínez, Francisco; Torres Torres, Francisco; Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria; Bará Temes, Francisco Javier (AMER GEOPHYSICAL UNION, 2003-07-31)
    Article
    Open Access
    An end-to-end simulator for the assessment of the performances of a spaceborne interferometric radiometer measuring the brightness temperature of Earth’s surface (ground and sea) is presented. The tool covers the complete ...
  • Examen Final 

    Comerón Tejero, Adolfo; Duffo Ubeda, Núria; Pradell i Cara, Lluís (Universitat Politècnica de Catalunya, 2014-06-04)
    Exam
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  • Examen Final 

    Aguasca Solé, Alberto; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Mateu, J.; O'Callaghan Castellà, Juan Manuel; Pradell i Cara, Lluís (Universitat Politècnica de Catalunya, 2015-03-23)
    Exam
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  • Examen Final 

    Duffo Ubeda, Núria; Pradell i Cara, Lluís (Universitat Politècnica de Catalunya, 2019-01-18)
    Exam
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  • Examen Final 

    Pradell i Cara, Lluís; Duffo Ubeda, Núria (Universitat Politècnica de Catalunya, 2018-06-18)
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  • Examen Final 

    Comerón Tejero, Adolfo; Duffo Ubeda, Núria; Pradell i Cara, Lluís (Universitat Politècnica de Catalunya, 2013-06-21)
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  • Examen Final 

    Comerón Tejero, Adolfo; Duffo Ubeda, Núria; Pradell i Cara, Lluís (Universitat Politècnica de Catalunya, 2014-01-21)
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  • Examen Final 

    Vall-Llossera Ferran, Mercedes Magdalena; Torres Torres, Francisco; Pérez, J.; López, C.; Fàbregas Bargalló, Xavier; Duffo Ubeda, Núria (Universitat Politècnica de Catalunya, 2015-06-19)
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  • Examen Final 

    Aguasca Solé, Alberto; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Mateu, J.; O'Callaghan Castellà, Juan Manuel; Pradell i Cara, Lluís; Torres Torres, Francisco (Universitat Politècnica de Catalunya, 2014-01-10)
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  • Examen Final 

    Duffo Ubeda, Núria; Pradell i Cara, Lluís (Universitat Politècnica de Catalunya, 2017-06-06)
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  • Examen Final 

    Duffo Ubeda, Núria; Pradell i Cara, Lluís (Universitat Politècnica de Catalunya, 2018-01-15)
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  • Faraday rotation angle retrieval using SMOS radiometric data 

    Wu, Lin; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    SMOS radiometric data is used to derive Faraday rotation for a number of orbits combining several scenarios: land, ice and water. Results compare very well with the values theoretically predicted from available ionosphere ...
  • Faraday rotation retrieval using SMOS radiometric data 

    Corbella Sanahuja, Ignasi; Wu, Lin; Torres Canals, Francesc; Duffo Ubeda, Núria; Martín Neira, Manuel (2015-03-01)
    Article
    Open Access
    Faraday rotation is dynamically computed from L-band radiometric data acquired by the Soil Moisture and Ocean Salinity satellite. Improved full polarimetric image reconstruction and smart spatiotemporal filtering are used ...