Now showing items 1-20 of 30

  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Experimental validation of radiometric sensitivity in correlation radiometers 

    Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Monzón Soria, Francisco Jose (IEE-INST ELEC ENG, 1998-12-31)
    Article
    Open Access
    The prediction of the radiometric sensitivity of correlation radiometers based on the system parameters requires knowledge of the standard deviation of each measurement due to the finite integration time. Theoretical ...
  • Impact of antenna errors on the radiometric accuracy of large aperture synthesis radiometers. study applied to miras. 

    Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Romeu Robert, Jordi (AMER GEOPHYSICAL UNION, 1997-04-30)
    Article
    Open Access
    A classification of system errors in aperture synthesis radiometry applied to Earth obervation is presented. A general procedure to quantify th eimpact of antenna errors on the radiometric accuracy is developed and is then ...
  • Inter-island optical link tests 

    Comerón Tejero, Adolfo; Bará Temes, Francisco Javier; Belmonte Molina, Aniceto; Ruiz, Domingo; Czichy, Reinhard (1990-05)
    Article
    Open Access
  • Inter-islands optical link tests 

    Comerón Tejero, Adolfo; Bará Temes, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1990-05-01)
    Article
    Open Access
    Free-space optical communication systems between satellites and also between a satellite and a ground station foreseen in Europe in the mid-1990's require far-field on-ground experimentation prior to launch. To identify ...
  • 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)
    Conference report
    Open Access
  • 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)
    Article
    Open Access
    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 ...
  • Modelizacion y utilizacion de spd para sintesis de muy bajo ruido banda L 

    Rocadenbosch Burillo, Francisco; Bará Temes, Francisco Javier; Comerón Tejero, Adolfo (1991)
    Conference report
    Open Access
    A state of the art low noise cryogenic amplifier for L-band radio astronomy applications is presented. It was implemented in hybrid MIC technology using commercially available chip HEMT transistors. The average noise ...
  • Modelización y utilización de detectores de fase muestreados para síntesis de frecuencias de microondas 

    Rocadenbosch Burillo, Francisco; Bará Temes, Francisco Javier; Comerón Tejero, Adolfo (1991)
    Conference report
    Open Access
    177e interna! structure of a Sampling Phase Detector (SPD) may be understood as a high arder impulse generador (IG) composed by a step recovery diode (SRD) that properly pumps a ba1anced mixer through coupling capacirors. ...
  • On-board phase and modulus calibration of large aperture synthesis radiometers: study applied to miras. 

    Torres Torres, Francisco; Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Ferrero Pintor, Roberto (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-07-01)
    Article
    Open Access
    On-board calibration of bidimensional aperture synthesis radiometers with a large number of antennas by the standard correlated noise injection method is technologically very critical because of the stringent requirements ...
  • Ondas electromagnéticas en comunicaciones 

    Bará Temes, Francisco Javier (Edicions UPC, 1999)
    Book
    Open Access
    Este libro está dedicado al estudio de las ondas electromagnéticas, sus peculiaridades en frecuencias ópticas, y los principios básicos de su interacción con la materia. Su principal objetivo es facilitar la adquisición ...