Ara es mostren els items 44-63 de 72

    • Radiometric performance of SMOS full polarimetric imaging 

      Wu, Lin; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Durán Martínez, Israel; Vall-Llossera Ferran, Mercedes Magdalena; Camps, Adiano; Delwart, Steven; Martín Neira, Manuel (2013-11)
      Article
      Accés restringit per política de l'editorial
      This work has been conducted in the framework of several projects devoted to assess the performance of the Soil Moisture and Ocean Salinity (SMOS) mission full-pol measurement mode. Since its launch in November 2009, SMOS ...
    • Refining the methodology to correct the faraday rotation angle from SMOS measurements 

      Rubino, Roselena; Duffo Ubeda, Núria; González Gambau, Verónica; Corbella Sanahuja, Ignasi; Durán Martínez, Israel; Torres Torres, Francisco; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this work, a refined methodology to correct the Faraday Rotation angle (FRA) for the SMOS mission is proposed. The method is based on calculating the FRA using the SMOS full-pol radiometric data to obtain VTEC maps ...
    • Remote sensing of hydrometeors by means of interfermotric radiometry: theory and experimental results 

      Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Martín Neira, Manuel; Nesti, G; Olhmer, E (2000-05)
      Article
      Accés restringit per política de l'editorial
      Spaceborne and ground-based radiometric measurements at microwave and millimeterwave frequencies have proved able to monitor hydrometeors, but at present the angular resolution of those systems is limited by the radiometer's ...
    • Residual calibration error impact on SMOS SLL performance 

      Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Durán Martínez, Israel; Lin, Wu; Duffo Ubeda, Núria; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      SMOS Side Lobe Level (SLL), which is caused by the limited coverage of the measured visibility samples in the frequency domain, is responsible for non-negligible radiometric errors at pixels placed close to large brightness ...
    • RFI detection and mitigation for advanced correlators in interferometric radiometers 

      Pérez Portero, Adrián; Querol Borràs, Jorge; Camps Carmona, Adriano José; Martín Neira, Manuel; Suess, Martin; Ramirez, Juan Ignacio; Zurita Campos, Alberto M.; Closa Soteras, Josep; Oliva, Roger; Onrubia Ibáñez, Raul (Multidisciplinary Digital Publishing Institute (MDPI), 2022-09-01)
      Article
      Accés obert
      This work presents the first RFI detection and mitigation algorithm for the interferometric radiometers that will be implemented in its correlator unit. The algorithm operates in the time and frequency domains, applying ...
    • Sea surface emissivity observations at L-band: first results of the Wind and Salinity Experiment WISE 2000 

      Camps Carmona, Adriano José; Font Ferré, Jordi; 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)
      Article
      Accés obert
      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 ...
    • SMOS calibration and instrument performance after one year in orbit 

      Oliva, Ramon; Martín Neira, Manuel; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Kainulainen, J.; Tenerelli, J.; Cabot, F.; Martín Porqueras, F. (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Article
      Accés restringit per política de l'editorial
      This paper summarizes the rationale for the European Space Agency's Soil Moisture and Ocean Salinity (SMOS) mission routine calibration plan, including the analysis of the calibration parameter annual variability, and the ...
    • SMOS image reconstruction quality assessment 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Wu, Lin; Duffo Ubeda, Núria; Durán Martínez, Israel; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      After more than four years of operation, the SMOS (Soil Moisture and Ocean Salinity) European Space Agency (ESA) mission [1] has proven to be highly useful for a variety of scientific applications related to soil moisture ...
    • SMOS instrument performance after more than 11 years in orbit 

      Martín Neira, Manuel; Oliva, Roger; Onrubia Ibáñez, Raul; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Rubino, Roselena; Kainulainen, Juha; Closa Soteras, Josep; Zurita Campos, Alberto M.; del Castillo, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      ESA's Soil Moisture and Ocean Salinity (SMOS) mission [1] has been in orbit for over 11 years, and its Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) in two dimensions keeps being fully operational. This ...
    • SMOS instrument performance after more than 8 years in orbit and lessons learnt for future L-band missions 

      Martín Neira, Manuel; Oliva Balagué, Roger; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Durán Martínez, Israel; Kainulainen, Juha; Closa Soteras, Josep; Zurita Campos, Alberto Manuel; Cabot, François; Khazaal, Ali; Anterrieu, E.; Barbosa, José; Tenerelli, Joseph; Díez, Raúl; Turiel, Antonio; González Gambau, Verónica (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
    • SMOS instrument performance and calibration after 6 years in orbit 

      Martín Neira, Manuel; Oliva, Roger; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Durán Martínez, Israel; Kainulainen, Juha; Closa, Josep; Zurita Campos, Alberto Manuel; Cabot, François; Khazaal, Ali; Anterrieu, E.; Barbosa, José; Tenerelli, Joseph (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      ESA’s Soil Moisture and Ocean Salinity (SMOS) mission has been in orbit for over 6 years, and its Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) in two dimensions keeps working well. The data for almost this ...
    • SMOS instrument performance and calibration after six years in orbit 

      Martín Neira, Manuel; Oliva, Roger; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Durán Martínez, Israel; Torres Torres, Francisco; Kainulainen, Juha; Closa, Josep; Zurita Campos, Alberto Manuel; Cabot, François; Khazaal, Ali; Anterrieu, E.; Barbosa, José; Tenerelli, Joseph; Turiel, Antonio; Delwart, Steven (2016-07-01)
      Article
      Accés obert
      ESA's Soil Moisture and Ocean Salinity (SMOS) mission, launched 2-Nov-2009, has been in orbit for over 6 years, and its Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) in two dimensions keeps working well. The ...
    • SMOS simplified iterative full-pol brightness temperature retrieval 

      Durán Martínez, Israel; Lin, Wu; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      SMOS is the acronym for the Soil Moisture and Ocean Salinity mission by the European Space Agency (ESA) [1]. Its single payload, the Microwave Imaging Radiometer using Aperture Synthesis (MIRAS), was successfully launched ...
    • SMOS third mission reprocessing after 10 years in orbit 

      Oliva Balagué, Roger; Martín Neira, Manuel; Corbella Sanahuja, Ignasi; Closa Soteras, Josep; Zurita Campos, Alberto Manuel; Cabot, François; Khazaal, Ali; Richaume, Philippe; Kainulainen, Juha; Barbosa, José; Lopes, Gonçalo; Tenerelli, Joseph; Díez García, Raúl; González Gambau, Verónica; Crapolicchio, Raffaele (Multidisciplinary Digital Publishing Institute (MDPI), 2020-05-01)
      Article
      Accés obert
      After more than 10 years in orbit, the SMOS team has started a new reprocessing campaign for the SMOS measurements, which includes the changes in calibration and image reconstruction that have been made to the Level 1 ...
    • Some results on SMOS-MIRAS calibration and Imaging 

      McMulan, K.; Brown, N.; Anterrieu, E.; Oliva, R.; Martín Porqueras, F.; Gutierrez, A.; Barbosa, J.; Martín Neira, Manuel; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Cabot, F.; Duffo Ubeda, Núria; Closa, J.; Kainulainen, J.; Castro, R. (2010)
      Text en actes de congrés
      Accés obert
      The performance requirements of the SMOS payload are demanding in terms of spatial resolution, accuracy, stability and precision, all critical to fulfill its scientific objectives. For this reason a commissioning ...
    • Spatial biases analysis and mitigation methods in SMOS images 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Wu, Lin; Duffo Ubeda, Núria; Durán Martínez, Israel; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      SMOS brightness temperature images show some residual artifacts as a function of spatial directions. Due to having different antenna patterns in each element, even if knowing them perfectly, a minimum reconstruction error ...
    • Stability of the MIRAS amplitude calibration 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Efficient methods to characterize and mitigate long-and short- term drifts in SMOS data have been developed after careful analysis of the external and internal calibration parameters and by accurate modeling of the individual ...
    • 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 GRSS standard for GNSS-reflectometry 

      Carreño Luengo, Hugo; Camps Carmona, Adriano José; Flouri, Nicolas; Martín Neira, Manuel; Ruf, Chris; Wang, Tianlin; Khalsa, Siri Jodha; Clarizia, Maria Paola; Reynolds, Jennifer; Johnson, Joel (2020)
      Text en actes de congrés
      Accés obert
      In February 2019 a Project Authorization Request was approved by the Institute of Electrical and Electronics Engineers (IEEE) Standards Association with the title “Standard for Global Navigation Satellite System Reflectometry ...
    • The IEEE-SA Working Group on Spaceborne GNSS-R: Scene study 

      Carreño Luengo, Hugo; Camps Carmona, Adriano José; Ruf, Chris; Floury, Nicolas; Martín Neira, Manuel; Wang, Tianlin; Khalsa, Siri Jodha; Clarizia, Maria Paola; Reynolds, Jennifer; Johnson, Joel; O’Brien, Andrew; Galdi, Carmela; di Bisceglie, Maurizio; Dielacher, Andreas (Institute of Electrical and Electronics Engineers (IEEE), 2021-06-16)
      Article
      Accés obert
      The Institute of Electrical and Electronics Engineers (IEEE) Geoscience and Remote Sensing Society (GRSS) created the GRSS “Standards for Earth Observation Technical Committee” to advance the usability of remote sensing ...