Envíos recientes

  • Silicon photomultiplier detector for atmospheric lidar applications 

    Riu Gras, Jordi; Sicard, Michaël; Royo Royo, Santiago; Comerón Tejero, Adolfo (2012-04-01)
    Artículo
    Acceso restringido por política de la editorial
    The viability and performance of using a silicon photomultiplier (SiPM) in atmospheric lidar applications is experimentally compared against the well-established use of photomultiplier tubes. By using a modified lidar setup ...
  • Multicolor solitons 

    Torner Sabata, Lluís; Stegeman, George (2001-06)
    Artículo
    Acceso restringido por política de la editorial
  • Rf interference analysis in aperture synthesis interferometric radiometers: application to l-band miras instrument 

    Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Torres, F; Bará, J; Capdevila Vives, Joan (Institute of Electrical and Electronics Engineers (IEEE), 2000-03)
    Artículo
    Acceso abierto
    Current spaceborne radiometers do not achieve the required spatial resolution demanded by the scientific community due to antenna-size technological limitations. In recent years, several space agencies have been studying ...
  • 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)
    Artículo
    Acceso abierto
    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 ...
  • L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission 

    Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria; Torres Torres, Francisco; Villarino Villarino, Ramón; Enrique, L; Julbé, F; Font Capafons, Josep; Julià, A; Gabarró, C; Etcheto, J; Boutin, J; Weill, A; Caselles Costa, Vicent; Rubio, E; Wursteisen, P (2003-06)
    Artículo
    Acceso abierto
    Soil moisture and ocean salinity at surface level can be measured by passive microwave remote sensing at L-band. To provide global coverage data of soil moisture and ocean salinity with three-day revisit time, the Earth ...
  • Sea surface emissivity observations at L-band: first results of the Wind and Salinity Experiment WISE 2000 

    Camps Carmona, Adriano José; Font Capafons, Josep; Etcheto, J; Caselles Costa, Vicent; Weill, A; Corbella Sanahuja, Ignasi; Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria; Torres Torres, Francisco; Villarino Villarino, Ramón; Enrique, L; Julia, A; Gabarro, C; Boutin, J; Rubio, E; Reising, S; Wursteisen, P.; Berger, M.; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2002-10)
    Artículo
    Acceso abierto
    Sea surface salinity can be measured by passive microwave remote sensing at L-band. In May 1999, the European Space Agency (ESA) selected the Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Opportunity Mission to ...
  • Circuit model for mode conversion in coplanar waveguide assymmetric series-impedances 

    Ribó i Pal, Miquel; Cruz Romero, Janill Marie de la; Pradell i Cara, Lluís (Institution of Electrical Engineers, 1999-10)
    Artículo
    Acceso abierto
    A new 'circuit model' for converting between even and odd modes in asymmetric series impedances in the ground plane of a coplanar waveguide is presented. The model is based on the separation of modes into two input and two ...
  • A proposal for an adaptive s-aloha access system for a mobile cdma environment 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (1998-08)
    Artículo
    Acceso abierto
    This paper presents a novel adaptive direct-sequence code-division multiple-access (DS-CDMA) slotted-ALOHA (S-ALOHA) packet random-access scheme with transmitter-based spreading codes for mobiles. It is aimed at improving ...
  • Cramer-Rao bounds in the estimation of time of arrival in fading channels 

    René Jativa, E.; Vidal Manzano, José (2018-03-16)
    Artículo
    Acceso abierto
    This paper computes the Cramer-Rao bounds for the time of arrival estimation in a multipath Rice and Rayleigh fading scenario, conditioned to the previous estimation of a set of propagation channels, since these channel ...
  • Hybrid analog-digital transmit beamforming for spectrum sharing backhaul networks 

    Vázquez Oliver, Miguel Ángel; Blanco Botana, Luis; Pérez Neira, Ana Isabel (2018-02-14)
    Artículo
    Acceso abierto
    This paper deals with the problem of analog-digital transmit beamforming under spectrum sharing constraints for backhaul systems. In contrast to fully digital designs, where the spatial processing is done at baseband unit ...
  • GNSS transpolar earth reflectometry exploriNg system (G-TERN): mission concept 

    Cardellach Galí, Estel; Wickert, Jens; Baggen, Rens; Camps Carmona, Adriano José; Hernández Pajares, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2018-03-09)
    Artículo
    Acceso abierto
    The global navigation satellite system (GNSS) Transpolar Earth Reflectometry exploriNg system (G-TERN) was proposed in response to ESA's Earth Explorer 9 revised call by a team of 33 multi-disciplinary scientists. The ...
  • Polarization lidar detection of agricultural aerosol emissions 

    Gregorio, Eduard; Gené Mola, Jordi; Sanz Cortiella, Ricardo; Rocadenbosch Burillo, Francisco; Chueca, Patricia; Arnó Satorra, Jaume; Solanelles, Francesc; Rosell Polo, Joan Ramon (2018-04-18)
    Artículo
    Acceso abierto
    Agricultural aerosol emissions can significantly impact human and animal health as well as the environment. Therefore, it is essential to adopt new sensing techniques for real-time monitoring these emissions in high temporal ...

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