Now showing items 1-20 of 54

  • A new calibration technique for interferometric radiometers 

    Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Bará Temes, Francisco Javier (1998)
    Conference report
    Open Access
    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)
    Conference report
    Open Access
    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)
    Conference report
    Open Access
    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)
    Article
    Open Access
    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)
    Conference report
    Open Access
    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-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-04-30)
    Article
    Open Access
    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 ...
  • 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)
    Article
    Open Access
    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)
    Article
    Open Access
    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)
    Conference report
    Open Access
    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)
    Conference report
    Open Access
  • 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)
    Conference report
    Open Access
  • 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)
    Article
    Open Access
  • 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)
    Part of book or chapter of book
    Restricted access - publisher's policy
    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)
    Conference report
    Open Access
  • Caracterización del ruido de fase de osciladores sintetizados con técnicas PLL 

    Torres Torres, Francisco; Bará Temes, Francisco Javier; Artal, Eduardo; Porta, Albert (1990)
    Conference report
    Open Access
  • Circuitos de microondas con líneas de transmisión 

    Bará Temes, Francisco Javier (Edicions UPC, 1994)
    Book
    Open Access
    El libro propone una introducción a las microondas sin recurrir al análisis electromagnético. Comienza por las líneas de transmisión, la carta de Smith y sus aplicaciones, y continua por la descripción de los circuitos de ...
  • Circuits de microones amb línies de transmissió 

    Bará Temes, Francisco Javier (Edicions UPC, 1993)
    Book
    Open Access
    El llibre proposa una introducció a les microones sense recórrer a l'anàlisi electromagnètica. Comença per les línies de transmissió, la carta de Smith i les seves aplicacions, i continua per la descripció de circuits de ...
  • Dispersion characteristics and field structure of an axially magnetized ferrite loaded rectangular waveguide 

    Bará Temes, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 1972)
    Conference report
    Open Access
    A basic limitation in an earlier work on the axially magnetized, ferrite loaded rectangular guide has led to a detailed re-examination of this problem. Both a series solution and a perturbational technique are used to find ...
  • Efecto de la reducción simétrica del plano de tierra en líneas microstrip 

    Bará Temes, Francisco Javier (1981)
    Conference report
    Open Access
    The variations of the characteristic impedance and wavelength of a symmetrical biplate line with the width of the upper plate held constant are studied, for several widely used dielectrics, by the method of moments with a ...
  • 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 ...