Ara es mostren els items 21-40 de 164

    • Brightness-temperature retrival methods in synthetic aperture radiometers 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena (IEEE, 2009-01)
      Article
      Accés obert
      Bightness-temperature retrieval techniques for synthetic aperture radiometers are reviewed. Three different approaches to combine measured visibility and antenna temperatures, along with instrument characterization ...
    • Burned area prediction in Southern Asia using machine learning with land and atmospheric parameters 

      Irawan, Amir Mustofa; Vall-Llossera Ferran, Mercedes Magdalena; López Martínez, Carlos; Camps Carmona, Adriano José; Chaparro Danon, David; Portal González, Gerard; Pablos Hernández, Miriam (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Comunicació de congrés
      Accés obert
      In the work a random forest model has been implemented as an interpretable machine learning tool in the effort to estimate the burned areas caused by fire outbreaks in India, Pakistan, and Myanmar in April and May 2022. ...
    • 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)
      Text en actes de congrés
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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)
      Capítol de llibre
      Accés restringit per política de l'editorial
      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)
      Text en actes de congrés
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    • Calibration trade-off 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 (Centro Stampa, 1999)
      Text en actes de congrés
      Accés obert
    • Calibration, performance, and imaging tests of a fully digital synthetic aperture interferometer radiometer 

      Ramos Pérez, Isaac; Forte Veliz, Giuseppe Francesco; Camps Carmona, Adriano José; Bosch Lluís, Xavier; Valencia Domènech, Enric; Rodríguez Álvarez, Nereida; Hyuk, Park; Vall-Llossera Ferran, Mercedes Magdalena (2012-06-28)
      Article
      Accés restringit per política de l'editorial
      This work presents the calibration, characterization, and imaging tests of the Passive Advanced Unit-Synthetic Aperture instrument (PAU-SA). PAU-SA is a fully digital -shaped two-dimensional synthetic aperture interferometric ...
    • Combining SMOS with visible and near/shortwave/thermal infrared satellite data for high resolution soil moisture estimates 

      Sanchez Ruiz, Sergio; Piles Guillem, Maria; Sanchez, Nilda; Martinez Fernandez, Jose; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José (Elsevier, 2014-08-04)
      Article
      Accés restringit per política de l'editorial
      Sensors in the range of visible and near-shortwave-thermal infrared regions can be used in combination with passive microwave observations to provide soil moisture maps at much higher spatial resolution than the original ...
    • Correlated triple collocation to estimate SMOS, SMAP and ERA5-Land soil moisture errors 

      Pablos Hernández, Miriam; Turiel Martínez, Antonio; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Portabella, Marcos (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Comunicació de congrés
      Accés obert
      The novel Correlated Triple Collocation (CTC) analysis allows to assess three different data sources of similar spatial resolutions, but with two of them being correlated. In this study, the CTC was applied to estimate the ...
    • Denormalization of visibilities for in-orbit calibration of interferometric radiometers 

      Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Beraza Robledano, Santiago; Martín Neira, Manuel; Gutiérrez, C. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-10-31)
      Article
      Accés obert
      This paper reviews the relative calibration of an interferometric radiometer taking into account the experimental results of the first batch of receivers developed in the frame of the European Space Agency's Soil Moisture ...
    • Denormalization of visibilities for in-orbit calibration of interferometric radiometers 

      Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Beraza Robledano, Santiago; Gutiérrez, C.; Martín Neira, Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-10-31)
      Article
      Accés obert
      This paper reviews the relative calibration of an interferometric radiometer taking into account the experimental results of the first batch of receivers developed in the frame of the European Space Agency's Soil Moisture ...
    • Design of single shaped reflector antennas for synthesis of shaped contour beams using genetic algorithms 

      Vall-Llossera Ferran, Mercedes Magdalena; Rius Casals, Juan Manuel; Duffo Ubeda, Núria; Cardama Aznar, Ángel (JOHN WILEY & SONS INC, 2000-12-31)
      Article
      Accés obert
      A genetic algorithm (GA) has been developed for designing single-shaped reflector antennas for the synthesis of shaped contour beams. The graphical processing technique is used in order to obtain the antenna radiation ...
    • Design of single shaped reflector antennas for synthesis of shaped contour beams using genetic algorithms 

      Vall-Llossera Ferran, Mercedes Magdalena; Rius Casals, Juan Manuel; Duffo Ubeda, Núria; Cardama Aznar, Ángel (2000-12)
      Article
      Accés restringit per política de l'editorial
      A genetic algorithm (GA) has been developed for designing single-shaped reflector antennas for the synthesis of shaped contour beams. The graphical processing technique is used in order to obtain the antenna radiation ...
    • Design of single shaped reflector antennas with a single feed applying genetic algorithms and graphical processing techniques 

      Vall-Llossera Ferran, Mercedes Magdalena; Rius Casals, Juan Manuel; García, M; Duffo Ubeda, Núria (SEE, 1998)
      Text en actes de congrés
      Accés obert
      A genetic algorithm GA has been de ( ) eloped for designing single-shaped reflector antennas for the synthesis of shaped contour beams. The graphical processing technique is used in order to obtain the antenna radiation ...
    • Determination of sea surface salinity and wind speed by L-band microwave radiometry from a fixed platform 

      Gabarró Prats, Carolina; Vall-Llossera Ferran, Mercedes Magdalena; Font, Jordi; Camps Carmona, Adriano José (TAYLOR & FRANCIS LTD, 2004-01-31)
      Article
      Accés obert
      The European Space Agency Soil Moisture and Ocean Salinity (SMOS) mission aims at obtaining global maps of soil moisture and sea surface salinity from space for large-scale and climatic studies. It uses an L-band ...
    • Una Década de teledetección en el Grupo de Ingeniería Electromagnética y Fotónica 

      Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; Mallorquí Franquet, Jordi Joan; Rocadenbosch Burillo, Francisco (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 2003)
      Article
      Accés obert
    • Una década de teledetección en el Grupo de Ingeniería Electromagnética y Fotónica 

      Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; Mallorquí Franquet, Jordi Joan; Rocadenbosch Burillo, Francisco (2003-04-30)
      Article
      Accés obert
    • Digital back-end for RFI detection and mitigation in microwave radiometers 

      Forte Veliz, Giuseppe Francesco; Camps Carmona, Adriano José; Ramos, I.; Vall-Llossera Ferran, Mercedes Magdalena (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Radio-frequency interference (RFI) is a serious problem in microwave radiometry. In order to process the received data in real time, a powerful back-end for RFI detection and mitigation system must be implemented. This ...
    • Diseño interactivo de formas de baja detectabilidad radar 

      Rius Casals, Juan Manuel; Jofre Roca, Lluís; Vall-Llossera Ferran, Mercedes Magdalena (1991)
      Text en actes de congrés
      Accés obert
      Radar cross section (RCS) of complex targets can be obtained in real time using the hardware capabilities of a high performance graphic workstation. Target geometry is modelled by a computer-aided design package. First ...
    • Downscaling SMOS-derived soil moisture using MODIS visible/infrared data 

      Piles, Maria; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; Corbella Sanahuja, Ignasi; Panciera, Rocco; Ruediger, Christoph; Kerr, Yann H.; Walker, Jeffrey (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-09)
      Article
      Accés restringit per política de l'editorial
      A downscaling approach to improve the spatial resolution of Soil Moisture and Ocean Salinity (SMOS) soil moisture estimates with the use of higher resolution visible/infrared (VIS/IR) satellite data is presented. The ...