Now showing items 1-20 of 73

    • Accurate geolocation of rfi sources in smos imagery based on superresolution algorithms 

      Hyuk, Park; Camps Carmona, Adriano José; González Gambau, Veronica (2014)
      Conference report
      Restricted access - publisher's policy
      Accurate geolocation of SMOS RFI sources is very important for effectively switching-off the illegal emitter in the protected L-band. We present a novel approach for the geolocation of SMOS RFI sources, based on the Direction ...
    • Airborne wind retrieval using GPS delay-Doppler maps 

      Zavorotny, Valery; Rodríguez, Nereida; Akos, D.M.; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Conference report
      Restricted access - publisher's policy
      Global Navigation Satellite System Reflectometry (GNSSR) has emerged recently as a promising remote sensing tool to retrieve various geophysical parameters of Earth’s surface. GNSS-reflected signals, after being received ...
    • Algoritmos de calibración para radiómetros digitales 

      Guerrero Martínez, Miguel Ángel (Universitat Politècnica de Catalunya, 2009-05)
      Master thesis (pre-Bologna period)
      Open Access
    • An imaging algorithm for synthetic aperture interferometric radiometers with built-in RFI mitigation 

      Camps Carmona, Adriano José; Hyuk, Park; González Gambau, Veronica (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      Radio Frequency Interference (RFI) is probably one of the most important limiting factors in the accuracy of the brightness temperatures measured by microwave radiometers. Due to the proximity of the 'protected' L-band ...
    • Analysis and mitigation of the reconstruction error in interferometric radiometry 

      Díez García, Raul (Universitat Politècnica de Catalunya, 2014-12-05)
      Master thesis (pre-Bologna period)
      Open Access
      [ANGLÈS] The European Space Agency (ESA) Soil Moisture and Ocean Salinity mission (SMOS) provides continuous global maps of soil moisture and ocean surface salinity. Its payload MIRAS (Microwave Imaging Radiometer with ...
    • Analysis of GNSS-R delay and doppler tracking errors 

      Hyuk, Park; Camps Carmona, Adriano José; Valencia Domènech, Enric; Carreño Luengo, Hugo; Martín Alemany, Francisco; Alonso Arroyo, Alberto; Pascual Biosca, Daniel (2012)
      Conference report
      Restricted access - publisher's policy
      The compensation of the delay and Doppler errors using tracking is important to accurately estimate the sea height in spaceborne GNSS-R. This work presents the impacts of the tracking residual errors on the GNSS-R observables, ...
    • Aplication of Interferometric Radiometry to Earth Observation 

      Camps Carmona, Adriano José (Universitat Politècnica de Catalunya, 1996-11-22)
      Doctoral thesis
      Open Access
      La tesis contiene en primer lugar un estudio de las técnicas de interferometria radiometrica, con énfasis en las causas de error y su impacto en las características del sensor. A continuación se proponen y comparan varias ...
    • Assembly verification integration and testing of the payload and communications system of the 3CAT-4 cubesat 

      Gonga Siles, Amadeu (Universitat Politècnica de Catalunya, 2020-09)
      Bachelor thesis
      Open Access
      Los nanosatélites han experimentado un importante crecimiento en estos últimos años desde que fueron estandarizados en 2000. El UPC-NanoSat Lab, que se encuentra en el Campus Nord de la Universidad Politécnica de Cataluña, ...
    • Assessment of back-end RFI mitigation techniques in passive remote sensing 

      Querol Borràs, Jorge; Alonso Arroyo, Alberto; Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Camps Carmona, Adriano José (2015)
      Conference lecture
      Restricted access - publisher's policy
      Radio-Frequency Interference (RFI) is a growing problem specially for those systems that work with low power signals such as passive remote sensing instruments. Consequently, RFI mitigation techniques are currently under ...
    • Assessment on linearity errors in detectors for interferometric radiometers 

      Torres Torres, Francisco; Duffo Ubeda, Núria; Gonzalez-Haro, Cristina; Vilaseca, R; Sagués, L; Martín-Neira, Manuel (2008)
      Conference report
      Restricted access - publisher's policy
      The performance of the power detectors used to denormalize the digital correlations in interferometric radiometers is degraded due to the non-linear behavior of the diode response. This work presents a comprehensive ...
    • Atmospheric-boundary-layer height retrieval using microwave radiometer and lidar sensors : algorithms and error estimation 

      Saeed, Umar (Universitat Politècnica de Catalunya, 2016-07-22)
      Doctoral thesis
      Open Access
      The Atmospheric Boundary Layer Height (ABLH) is an important parameter in weather forecasting, meteorology, avionics, and air-quality and dispersion models. Local development of the Atmospheric Boundary Layer (ABL) over ...
    • Calibration consistency tool for interferometric radiometers 

      González-Gambau, Verónica; Torres Torres, Francisco; Duffo Ubeda, Núria; Martín-Neira, Manuel (2008)
      Conference report
      Restricted access - publisher's policy
      This paper presents a method to check the consistency of the amplitude calibration in interferometric radiometers devoted to Earth observation This tool is based in the intrinsic properties of the internal calibration ...
    • 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 ...
    • Calibration Validation and Polarimetry in 2D Aperture Synthesis. Application to MIRAS 

      Ribó Vedrilla, Serni (Universitat Politècnica de Catalunya, 2005-06-30)
      Doctoral thesis
      Open Access
      La missió SMOS de l'Agència Europea de l'Espai (ESA) té com a objectiu mesurar la humitat del sòl i la salinitat dels oceans, paràmetres fonamentals per tal d'entendre el canvi climàtic global.<br/>MIRAS (Radiòmetre de ...
    • Chromatographic separations for fission products and actinides determination by different analytical techniques: mass spectrometry and radiometry 

      Perna, Lorenzo (Universitat Politècnica de Catalunya, 2003-06-26)
      Doctoral thesis
      Open Access
      Due to the nuclear testing, reentry and disintegration of nuclear powered satellites, nuclear reactor accidents, uranium nuclear fuel cycle and nuclear weapons production, actinides have been introduced into the environment. ...
    • Common mathematical framework for real and synthetic aperture by interferometry radiometers 

      Bosch Lluís, Xavier; Ramos Pérez, Isaac; Camps Carmona, Adriano José; Rodríguez Álvarez, Nereida; Valencia Domènech, Enric; Hyuk, Park (Institute of Electrical and Electronics Engineers (IEEE), 2014-01)
      Article
      Restricted access - publisher's policy
      This work focuses on the relationship between real and synthetic aperture radiometers giving a general and common mathematical framework for both of them. It will be demonstrated that a real aperture radiometer array ...
    • Comparación entre los productos de humedad del suelo SMOS y ECV 

      Portal González, Gerard (Universitat Politècnica de Catalunya, 2015-09)
      Master thesis (pre-Bologna period)
      Open Access
      The SMOS mission is providing the first ever global observations of surface soil moisture (SSM) at L-band. With almost five years of mapping this variable, it is now possible to start analyzing SSM spatial and temporal ...
    • Comparison of real-time time-frequency RFI mitigation techniques in microwave radiometry 

      Querol Borràs, Jorge; Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Alonso Arroyo, Alberto; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      Radio-Frequency Interference (RFI) is a well-known problem for Microwave Radiometers (MWR). A number of RFI mitigation techniques have been studied to deal with RFI from the receiver's side. In this study, a comparison in ...
    • Contribution to advanced sensor development for passive imaging of the Earth 

      Durán Martínez, Israel (Universitat Politècnica de Catalunya, 2017-11-20)
      Doctoral thesis
      Open Access
      This work has been formally undertaken within the frame of the scholarship number BES-2012-053917 of 1 December 2012, by the "Secretario de Estado de Investigación del Ministerio de Economía y Competitividad" related to ...
    • Contribution to the characterization of interferometric radiometers devoted to Earth observation: application to the MIRAS/SMOS payload 

      González Gambau, Verónica (Universitat Politècnica de Catalunya, 2012-09-05)
      Doctoral thesis
      Open Access
      The variability of soil moisture and ocean salinity controls the continuous exchange of water between the oceans, the atmosphere and the land. Therefore, the accurate and periodic measurements of these geophysical variables ...