Ara es mostren els items 103-122 de 216

    • L-band aperture synthesis radiometry: hardware requirements and system performance 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena (IEEE Piscataway, 2000)
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      Aperture synthesis radiometry is becoming a feasible concept for imaging applications, especially at low microwave frequencies where it takes clear advantage of the absence of mechanical antenna motion. A 2D interferometric ...
    • L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission 

      Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria; Torres Torres, Francisco; Villarino Villarino, Ramón; Enrique, L; Julbé, F; Font Capafons, Josep; Julià, A; Gabarró, C; Etcheto, J; Boutin, J; Weill, A; Caselles Costa, Vicent; Rubio, E; Wursteisen, P (2003-06)
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      Soil moisture and ocean salinity at surface level can be measured by passive microwave remote sensing at L-band. To provide global coverage data of soil moisture and ocean salinity with three-day revisit time, the Earth ...
    • L-Band Sea Surface Emissivity: Preliminary Results Of The WISE-2000 Campaign And Its Application To Salinity Retrieval In the SMOS Mission 

      Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria; Torres Torres, Francisco; Villarino Villarino, Ramón; Enrique, L.; Julbé, F.; Font, Jordi; Julià, A.; Gabarró Prats, Carolina; Etcheto, Jacqueline; Boutin, Jacqueline; Weill, Alain; Caselles, Vicente; Rubio, Eva; Wursteisen, Patrick (2003-06-30)
      Article
      Accés obert
      Soil moisture and ocean salinity at surface level can be measured by passive microwave remote sensing at L-band. To provide global coverage data of soil moisture and ocean salinity with three-day revisit time, the Earth ...
    • Latitudinal and seasonal SMOS amplitude calibration assessment 

      Gonzalez Gambau, Verónica; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Turiel, Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      The consistency of MIRAS amplitude calibration along the mission is a key issue to ensure a stable and accurate long-term dataset of ESA's SMOS soil moisture and ocean salinity data. Recent studies have revealed latitudinal ...
    • Low cost transmission line demonstrator for a novel intermediate level communication engineering laboratory 

      Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Cardama Aznar, Ángel; Romeu Robert, Jordi; Galindez, Oscar (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1998-11-30)
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      This paper is devoted to the description of a transmission line laboratory demonstrator for intermediate level communication engineering students, within a course on radiation and guided waves. Student activities have been ...
    • Low cost transmission line demonstrator for a novel intermediate level communication engineering laboratory 

      Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Cardama Aznar, Ángel; Romeu Robert, Jordi; Galíndez, O (1998-11)
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      Accés obert
      This paper is devoted to the description of a transmission line laboratory demonstrator for intermediate level communication engineering students, within a course on radiation and guided waves. Student activities have been ...
    • Lugares geométricos de mal condicionamiento y constelaciones de admitancias de fuentes utilizadas en la extracción de parámetros de ruido 

      O'Callaghan Castellà, Juan Manuel; Pradell i Cara, Lluís; Corbella Sanahuja, Ignasi (1996)
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    • Medida de la línea de dispositivo de dispositivos inestables 

      Corbella Sanahuja, Ignasi; O'Callaghan Castellà, Juan Manuel (1988)
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    • Medida de parámetros S de transistores chip hasta 40 ghz utilizando calibración TRL 

      Pradell i Cara, Lluís; Sabater, C.; Artal, E.; Comerón Tejero, Adolfo; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Fortuny, J. (1990)
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    • Method of moments applied to the analysis of rough surfaces modelled by fractals 

      Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Torres Torres, Francisco (2000)
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      The Scattering and Emissivity of rough surfaces involve solutions to non-linear differential equations. Different approaches have been used in the literature to obtain approximate solutions under some hypothesis. For example ...
    • Mezclador autooscilante con FET de AsGa en banda X. Consideraciones de diseño 

      Corbella Sanahuja, Ignasi; de los Reyes, Elías; Elias Fusté, Antoni (1998)
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      Using a single active device as a non linear element both oscillating and mixing functions are acomplished. A method of design that uses a dielectric resonator as a frequency selective network is given.
    • Mezclador balanceado compacto en banda V 

      Corbella Sanahuja, Ignasi; Carrasco, L.M.; Porta, Albert (Universidad de Málaga, 1992)
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    • Millimeter-wave aperture synthesis for remote sensing of the Earth 

      Harvey, Andrew R.; Greenaway, Alain H.; Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Martín Neira, Manuel (1998)
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      Millimetre-wave radiometry of the earth's surface from Low Earth Orbit (LEO) with a resolution of a few km requires antenna apertures several metres across and sub-second scanning times. Fulfilling these requirements with ...
    • Millimeter-wave aperture synthesis radiometry for snow and ice mapping 

      Harvey, A.R.; Greenaway, A.H.; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Bará Temes, Francisco Javier; Martín Neira, Manuel (1999)
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      An outline design for a dual-band mm-wave polarimetric SAIR has been presented and is considered to be tractable. The envisaged application is for snow and ice mapping and ocean wind vector measurement. The vastly increased ...
    • MIRAS calibration and performance: results from the SMOS in-orbit commissioning phase 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; González Gambau, Veronica; Pablos Hernández, Miriam; Durán Martínez, Israel; Martín Neira, Manuel (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-09)
      Article
      Accés restringit per política de l'editorial
      After the successful launching of the Soil Moisture and Ocean Salinity satellite in November 2009, continuous streams of data started to be regularly downloaded and made available to be processed. The first six months of ...
    • MIRAS characterization and monitoring during the SMOS In-Orbit Commissioning Phase 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Martín-Neira, Manuel; Duffo Ubeda, Núria; González-Gambau, Verónica; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena (2009)
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      Accés restringit per política de l'editorial
    • MIRAS end-to-end calibration: application to SMOS L1 processor 

      Vall-Llossera Ferran, Mercedes Magdalena; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Colliander, A; Martín Neira, Manuel; Ribó Vedrilla, Serni; Rautiainen, K; Duffo Ubeda, Núria (IEEE Press. Institute of Electrical and Electronics Engineers, 2005-05)
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      End-to-end calibration of the Microwave Imaging Radiometer by Aperture Synthesis (MIRAS) radiometer refers to processing the measured raw data up to dual-polarization brightness temperature maps over the earth's surface, ...
    • MIRAS End-to-End Calibration: Application to SMOS L1 Processor 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Colliander, Andreas; Martín Neira, Manuel; Ribó Vedrilla, Serni; Rautiainen, Kimmo; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-05-31)
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      Accés obert
      End-to-end calibration of the Microwave Imaging Radiometer by Aperture Synthesis (MIRAS) radiometer refers to processing the measured raw data up to dual-polarization brightness temperature maps over the earth's surface, ...
    • La Misión de oportunidad SMOS de la serie Earth Explorer. Radiometría por síntesis de apertura para la medida de la humedad del suelo y la salinidad del océano 

      Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Torres Torres, Francisco; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 2000)
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      Desde medi ados de los años 80, di versas Agencias Espaciales han prestado una atención a los ll amados radiómetros interferométricos por síntesis de apertura. Estos in strumentos ofrecen por primera vez un salto ...
    • Mitigation of cross-polar antenna pattern errors in SMOS: simplified approach 

      Durán Martínez, Israel; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Lin, Wu; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      This paper analyzes a simplified image reconstruction method that exclusively takes into account the dominant antenna pattern terms to model image inversion artifacts and mitigate SMOS polarimetric spatial bias over the ...