Ara es mostren els items 1-20 de 72

  • A new calibration technique for interferometric radiometers 

    Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Bará Temes, Francisco Javier (1998)
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    This paper presents a new method for receiver calibration of interferometric radiometers. It is based on the distributed noise injection mechanism and it consists of fully calibrating the baseline error terms of the central ...
  • Acreditació de la qualitat en sis assignatures de l'EPSC 

    Hernández Marco, Jordi; Bará Temes, Francisco Javier; Casas Piedrafita, Óscar; Jordana Barnils, José; Meseguer Pallarès, Roc; Valero García, Miguel (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2005-07)
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    El projecte “Acreditació de la qualitat en 6 assignatures de l’EPSC” s’ha dut a terme durant els anys 2003 i 2004, han participat sis professors de l’EPSC (Escola Politècnica Superior de Castelldefels de la Universitat ...
  • Algunos aspectos del secado de azulejos cerámicos por microondas 

    Bará Temes, Francisco Javier (1981)
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    The results of tests performed on the drying of unfired tiles by the action of microwaves are presented. These results show that a reduction of more than 5% humidity can be achieved in less than 5 minutes in a well designed ...
  • An inter-mountain optical-communications link experiment in Spain 

    Bará Temes, Francisco Javier; Comerón Tejero, Adolfo; Belmonte Molina, Aniceto (1990-03)
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    In support of the Agency's SILEX optical-communications project, a first evaluation of the suitability of the Canary Islands (Spain) for an optical communications test range has been conducted. The low atmospheric attenuation ...
  • Analisis de errores en la teoría de transiciones en líneas de transmisión 

    Bará Temes, Francisco Javier (1980)
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    The analysis of transmission line tapers is approached through an integral equation formulation (equivalent to a series solution for propagation through an inhomogeneous medium given by Bremmer) which can be used to ...
  • Analisys of noise injection networks for interferometric radiometer calibration 

    Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier (IEEE Microwave Theory and Techniques Society, 2000-04)
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    Abstract: The spatial resolution of current space-borne Earth observation radiometers is limited by the physical antenna aperture. This is especially critical at L-band, which exhibits high sensitivity to soil moisture ...
  • Analisys of noise-injection networks for interferometric-radiometer calibration 

    Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-04-30)
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    The spatial resolution of current space-borne Earth observation radiometers is limited by the physical antenna aperture. This is especially critical at L-band, which exhibits high sensitivity to soil moisture and sea surface ...
  • Angular resolution of two-dimensional, hexagonally sampled interferometric radiometers 

    Bará Temes, Francisco Javier; Camps Carmona, Adriano José; Torres Torres, Francisco; Corbella Sanahuja, Ignasi (1998-09)
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    A theoretical analysis of the angular resolution of two-dimensional interferometric radiometers for Earth observation from low-orbit satellites and its degradation due to spatial decorrelation effects is presented. The ...
  • Atmospheric-turbulence-induced power-fade statistics for a multiaperture optical reciever 

    Belmonte Molina, Aniceto; Comerón Tejero, Adolfo; Rubio, J.A.; Bará Temes, Francisco Javier; Fernández, E. (1997-01)
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    Accés restringit per política de l'editorial
    To estimate the probability distributions of power fades, we consider two basic types of disturbance in electromagnetic wave propagation through atmospheric turbulence: wave-front intensity fluctuations and wave-front ...
  • Automatic calibration of channels frequency response in interferometric radiometers 

    Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Monzón Soria, Francisco Jose (IEE-INST ELEC ENG, 1999-01-31)
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    The large field of view required in Earth observation interferometric radiometers does not enable the use of a variable delay to compensate for different transit times, as in radioastronomy. A technique is presented to ...
  • Averaging of collected-power fluctuations by a multiaperture receiver system 

    Belmonte Molina, Aniceto; Comerón Tejero, Adolfo; Bará Temes, Francisco Javier; Rubio, Juan Antonio (SPIE-INT SOCIETY OPTICAL ENGINEERING, 1996-10-31)
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    When a large aperture is used to collect light propagated through the atmosphere, it performs an average operation on the irradiance fluctuations, resulting in collected-power fluctuations that are not as large as those ...
  • Averaging of collected-power fluctuations by a multiaperture receiver system 

    Belmonte Molina, Aniceto; Comerón Tejero, Adolfo; Bará Temes, Francisco Javier; Antonio, Juan Rubio (1996-10)
    Article
    Accés restringit per política de l'editorial
    When a large aperture is used to collect light propagated through the atmosphere, it performs an average operation on the irradiance fluctuations, resulting in collected-power fluctuations that are not as large as those ...
  • Baseline redundancy and radiometric sensitivity: a critical review 

    Bará Temes, Francisco Javier; Camps Carmona, Adriano José; Torres Torres, Francisco; Corbella Sanahuja, Ignasi (European Spatial Agengy (ESA), 1995)
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    When computing the radiometric resolution of an interferometric radiometer the correlation among the errors of different baselines is usually assumed negligible. ln this way: a) the radiometric sensitivity turns out to be ...
  • Boundary element method applied to polarimetric radiometry of rain events 

    Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Torres Torres, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2000)
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  • Calibratin of fully polarimetric radiometers: the LAURA radiometer 

    Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Torres Torres, Francisco; Bará Temes, Francisco Javier (2000)
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  • Calibration and experimental results of a two-dimensional interferometric radiometer laboratory prototype 

    Camps Carmona, Adriano José; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier (1997-09)
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    Accés restringit per política de l'editorial
    In recent years, Earth observation by means of aperture synthesis radiometry has received special attention by some space agencies as a possible solution to achieve high radiometric accuracy and spatial resolution at low ...
  • Calibration and experimental results of a two-dimensional interferometric radiometer laboratory prototype 

    Camps Carmona, Adriano José; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Soler, Xavier (American Geophysical Union, 1997-09-01)
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  • Calibration methods in large interferometric radiometers devoted to earth observation 

    Torres Torres, Francisco; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena (VSP, 2000-01)
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    This paper starts with a summary and classification of errors of any kind that corrupt the fundamental measurement performed by an InR (interferometric radiometer), the so-called visibilities. This summary is based on prior ...
  • Calibration procedures in 2-D large interferometric radiometers study applied to the MIRAS/SMOS instrument 

    Torres Torres, Francisco; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria (2000)
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  • Caracterización del ruido de fase de osciladores sintetizados con técnicas PLL 

    Torres Torres, Francisco; Bará Temes, Francisco Javier; Artal, Eduardo; Porta, Albert (1990)
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