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Ara es mostren els items 114-127 de 127

    • Technology developments for an advanced L-band radiometer mission 

      Martín Neira, Manuel; Catalán Artigas, Albert; Corbella Sanahuja, Ignasi; Durán Martínez, Israel; Duffo Ubeda, Núria (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Comunicació de congrés
      Accés obert
      ESA’s Soil Moisture and Ocean Salinity (SMOS) mission was launched 2 Nov 2009 and, to date, is still in good health, providing valuable L-band observations of the Earth surface [1]. A number of products are obtained from ...

    • The Emissivity Of Foam-Covered Water Surface At L-Band: Theoretical Modeling And Experimental Results From The FROG 2003 Field Experiment 

      Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; Villarino Villarino, Ramón; Reul, Nicolas; Chapron, Bertrand; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Torres Torres, Francisco; Miranda Mendoza, Jorge José; Sabia, Roberto; Monerris Belda, Alessandra; Rodríguez Sánchez, Rubén (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-05-31)
      Article
      Accés obert
      Sea surface salinity can be measured by microwave radiometry at L-band (1400-1427 MHz). This frequency is a compromise between sensitivity to the salinity, small atmospheric perturbation, and reasonable pixel resolution. ...

    • The emissivity of foam-covered water surface at L-band: theoretical modeling and experimental results from the FROG 2003 field experiment 

      Rodríguez, R; Monerris Belda, Alessandra; Sabia, Roberto; Miranda Mendoza, Jorge José; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; Villarino Villarino, Ramón; Reul, N; Chapron, B; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Torres Torres, Francisco (IEEE Press. Institute of Electrical and Electronics Engineers, 2005-05)
      Article
      Accés obert
      Sea surface salinity can be measured by microwave radiometry at L-band (1400–1427 MHz). This frequency is a compromise between sensitivity to the salinity, small atmospheric perturbation, and reasonable pixel resolution. ...

    • The impact of antenna pattern frequency dependence in aperture synthesis microwave radiometers 

      Camps Carmona, Adriano José; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Martín Neira, Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-10-31)
      Article
      Accés obert

    • The impact of Antenna Pattern Frequency Dependence in Aperture Synthesis Microwave Radiometers 

      Camps Carmona, Adriano José; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Martín Neira, Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-10-31)
      Article
      Accés obert
      The effect of the frequency dependence of the antenna voltage patterns within the bandwidth of an aperture synthesis interferometric radiometer is studied and quantified using actual antenna voltage patterns measured at ...

    • The MIRAS “all-licef” calibration mode 

      Corbella Sanahuja, Ignasi; González Gambau, V.; Torres Torres, Francisco; Duffo Ubeda, Núria; Durán Martínez, Israel; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      Since each of the individual elements of the MIRAS array is a total power radiometer, the zero-spacing visibility can be obtained by the average of all the corresponding antenna temperatures. The main advantage of this ...

    • The visibility function in interferometric aperture synthesis radiometry 

      Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Torres Torres, Francisco (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-08-31)
      Article
      Accés obert

    • The visibility function in interferometric aperture synthesis radiometry 

      Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Torres Torres, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2004-08)
      Article
      Accés obert
      The fundamental equation of interferometric aperture synthesis radiometry is revised to include full antenna pattern characterization and receivers' interaction. It is shown that the cross correlation between the output ...

    • The WISE 2000 campaign: sea surface salinity and wind retrievals from L-band radiometry 

      Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Font Ferré, Jordi; Etcheto, Jacqueline; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Bará Temes, Francisco Javier; Torres Torres, Francisco; Wursteisen, Patrick; Martín Neira, Manuel (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2000)
      Text en actes de congrés
      Accés obert
      Sea surface salinity (SSS) has been recognized as a key parameter in climatological studies. SSS can be measured by passive microwave remote sensing at L band, where the sensitivity of the brightness temperatures shows a ...

    • Treball: control d’un motor DC 

      Duffo Ubeda, Núria; Mas Casals, Orestes Miquel; Muñoz Medina, Olga; Sanz Postils, Margarita (Universitat Politècnica de Catalunya, 2017)
      Treball d'assignatura
      Accés obert

    • Treball: filtres analògics 

      Duffo Ubeda, Núria; Mas Casals, Orestes Miquel; Muñoz Medina, Olga; Sanz Postils, Margarita (Universitat Politècnica de Catalunya, 2020)
      Treball d'assignatura
      Accés obert

    • Treball: modelització de sistemes electromecànics 

      Duffo Ubeda, Núria; Mas Casals, Orestes Miquel; Muñoz Medina, Olga; Sanz Postils, Margarita (Universitat Politècnica de Catalunya, 2018)
      Treball d'assignatura
      Accés obert

    • Treball: modelització d’un cristall de quars 

      Duffo Ubeda, Núria; Martí Espelt, Aniol; Mas Casals, Orestes Miquel (Universitat Politècnica de Catalunya, 2023)
      Treball d'assignatura
      Accés obert

    • Wide field of view microwave interferometric radiometer imaging 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Durán Martínez, Israel; González Gambau, Verónica; Martín Neira, Manuel (Multidisciplinary Digital Publishing Institute (MDPI), 2019-03-02)
      Article
      Accés obert
      In microwave interferometric radiometers with a large field of view, as for example the Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) onboard the Soil Moisture and Ocean Salinity (SMOS) satellite, one of the ...