Now showing items 1-20 of 28

    • 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 ...
    • Acquisition and processing software for an airborne soil moisture mapper LBand radiometer 

      Bosch i Lluis, Xavier (Universitat Politècnica de Catalunya, 2010-07-10)
      Master thesis (pre-Bologna period)
      Open Access
      The improvement in weather forecast and climate motorization, to prevent for example natural disasters, requires global scale knowledge of the soil moisture (SM) and the surface salinity (SSS), which are non-existent at ...
    • 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 ...
    • Baseline redundancy and radiometric sensitivity: a critical review 

      Bará Temes, Francisco Javier; Camps Carmona, Adriano José; Torres Torres, Francisco; Corbella Sanahuja, Ignasi (European Spatial Agengy (ESA), 1995)
      Conference report
      Open Access
      When computing the radiometric resolution of an interferometric radiometer the correlation among the errors of different baselines is usually assumed negligible. ln this way: a) the radiometric sensitivity turns out to be ...
    • 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 ...
    • 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 ...
    • Efecto de la corrección de la eficiencia de correlación GKJ sobre datos SMOS en la recuperación de humedad 

      Castellví Fernández, Marc (Universitat Politècnica de Catalunya, 2016-10)
      Master thesis (pre-Bologna period)
      Open Access
      Analysis of the effects of the correction GKJ on SMOS data in the retrieval process of soil moisture
    • Evaluation of MIRAS space borne instrument performance: snap shot radiometric accuracy and its improvement by means of pixel averaging 

      Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Martín Neira, Manuel (1997)
      Conference report
      Open Access
    • Formación de imagenes de blancos radar mediante tecnicas de apertura sintetica inversa con iluminación de onda esferica en campo próximo (SWISAR) 

      Broquetas Ibars, Antoni; Garriga, Adan; Jofre Roca, Lluís; Cardama Aznar, Ángel (1991)
      Conference report
      Open Access
      The paper presents a new Inverse Synthetic Aperture Radar (ISAR) algorithm intended for radar targets reflectivity imaging from scattering measurements. The method is based on a spherical wave near-field illumination of ...
    • Formación de imagenes radiometricas a frecuencias de microondas. Aplicaciones en teledetección 

      Broquetas Ibars, Antoni (1991)
      Conference report
      Open Access
      This paper presents the different contributions to the radiation measured by a radiometer, and how they can be related to the physical features of the scene. Several models ha ve been designed to simulate radiometric ...
    • High angular resolution RFI localization in synthetic aperture interferometric radiometers using direction-of-arrival estimation 

      Hyuk, Park; González Gambau, Veronica; Camps Carmona, Adriano José (2015-01-01)
      Article
      Open Access
      Radio-frequency interference (RFI) seriously affects the retrieval of geophysical parameters from the measurements of microwave radiometers. An accurate geolocation of the RFI is crucial to effectively switch off illegal ...
    • Ice thickness effects on Aquarius brightness temperatures over Antarctica 

      Pablos Hernández, Miriam; Piles Guillem, Maria; Gonzalez Gambau, Verónica; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena (2015-04-01)
      Article
      Open Access
      The Dome-C region, in the East Antarctic Plateau, is regarded as an ideal natural laboratory for calibration/validation of space-borne microwave radiometers. At L-band, the thermal stability of this region has been confirmed ...
    • Improvement of SMOS radiometric accuracy for salinity retrieval applications 

      Vizcarro I Carretero, Marc (Universitat Politècnica de Catalunya, 2016-07-13)
      Bachelor thesis
      Open Access
      This Degree Thesis has been performed at the Remote Sensing Laboratory (RSLab), at the Department of Signal Theory and Communications of the Universitat Politècnica de Catalunya. It consists on a set of strategies devoted ...
    • Inter-comparison of SMOS and aquarius brightness temperatures at L-band over selected targets 

      Pablos Hernández, Miriam; Piles Guillem, Maria; González Gambau, Veronica; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference lecture
      Restricted access - publisher's policy
      The spectral window at L-band (1.400 - 1.427 GHz) is reserved for passive microwave remote sensing. This band is well-suited to retrieve soil moisture and ocean salinity due to emissivity of soil and seawater decreases ...
    • L-band radiometry: data processing and emissivity models for Arctic sea-ice 

      Fabregat Carrascal, Pau (Universitat Politècnica de Catalunya, 2021-03-04)
      Bachelor thesis
      Restricted access - confidentiality agreement
      Earth climate and environments have undergone changes in the past decades and continue to change even faster, needing continuous and more advanced studies to understand and predict its consequences. Arctic environment, ...
    • MERITXELL: the Multifrequency Experimental Radiometer with Interference Tracking for Experiments over Land and Littoral—instrument description, calibration and performance 

      Querol Borràs, Jorge; Tarongí Bauzá, José Miguel; Forte Véliz, Giuseppe Francesco; Gómez López, José Javier; Camps Carmona, Adriano José (2017-05-10)
      Article
      Open Access
      MERITXELL is a ground-based multisensor instrument that includes a multiband dual-polarization radiometer, a GNSS reflectometer, and several optical sensors. Its main goals are twofold: to test data fusion techniques, and ...
    • Mesura del nivell de radiació de telèfons mòbils 

      Esteve Do Nascimento, Aleix (Universitat Politècnica de Catalunya, 2016-06-10)
      Bachelor thesis
      Restricted access - author's decision
      En aquest projecte final de grau s’estudiarà la radiació que emeten els telèfons mòbils mentre realitzen trucades a altres dispositius. S’analitzaran 3 telèfons de diferents marques, d’aquesta manera es podrà comparar la ...
    • Mitigation of cross-polar antenna pattern errors in SMOS: simplified approach 

      Durán Martínez, Israel; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Lin, Wu; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      This paper analyzes a simplified image reconstruction method that exclusively takes into account the dominant antenna pattern terms to model image inversion artifacts and mitigate SMOS polarimetric spatial bias over the ...