Browsing by Subject "Radiació -- Mesurament"

Now showing items 1-20 of 56

  • 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

  • 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, ...

  • 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 ...

  • 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 ...

  • 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 ...

  • 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 ...

  • Control of the back-end and positioning systems of the MERITXELL radiometer 

    Gómez López, José Javier (Universitat Politècnica de Catalunya, 2017-01)
    Bachelor thesis
    Open Access
    The aim of this project was the implementation of a software to position and obtain the desired measurements by a radiometer called MERITXELL. To satisfy the goals, this project was divided in three blocks (radiometer ...

  • Cross-correlation waveform mode: a critical review 

    Martín Alemany, Francisco; Hyuk, Park; Camps Carmona, Adriano José; D'Addio, Salvatore; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    Earth-reflected Global Navigation Satellite System (GNSS) signals have become an attractive tool for remote sensing. Recently it has been proposed as an alternative to the conventional altimetry to estimate the surface ...

  • Design, development and test of ICI radiometer back-end modules in the frame of metop 2nd-gen satellite constellation 

    Albajar Garduño, Marc (Universitat Politècnica de Catalunya, 2018-10)
    Master thesis
    Restricted access - author's decision
    Covenantee:  TRYO
    This Thesis belongs to a scientific project realized by the TRYO Company, which is part of the aerospace sector of the SENER Group. It describes the design, analysis, measurements and results of one of the back-end modules ...

  • Determination of the Total Annual Dose emitted by the ALBA Synchrotron 

    Sabio Ruiz, Daniel (Universitat Politècnica de Catalunya, 2015-07)
    Bachelor thesis
    Open Access
    Covenantee:  Sincrotró ALBA
    This work can be considered a first approach to the world of synchrotron machines. That field implies a lot of disciplines; in this work the focus will be in the radiological protection and all that surround it. A ...

  • 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)
    Conference report
    Restricted access - publisher's policy
    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 de filtros planares para radiometría 

    Cardenas Galeano, Enrique; Fernandez Diaz, Ruben (Universitat Politècnica de Catalunya, 2009-12-14)
    Bachelor thesis
    Open Access

  • Disseny, Mecanització i automatització d'una cadena d'espectroscòpia Mössbauer 

    Font Ventura, Francesc Xavier (Universitat Politècnica de Catalunya, 2009-04-03)
    Master thesis (pre-Bologna period)
    Open Access