Exploració per tema "Radiació--Mesurament"

Ara es mostren els items 1-18 de 18

    • Advanced receiver for future L-band radiometer 

      Vilaseca, Roger; Catalán Artigas, Albert; Montero, Jose; Puértolas, Montserrat; Santano, Bianca; Giménez, Daniel; Corbella Sanahuja, Ignasi (European Space Agency (ESA), 2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      ESA’s Soil Moisture and Ocean Salinity (SMOS) mission was launched 2 Nov 2009 and it is still providing L-band measurements after more than 12 years in orbit. The main mission products were global maps of soil moisture and ...

    • 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)
      Text en actes de congrés
      Accés obert
      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 ...

    • Design and implementation of a RFI monitoring payload for the 5G 24 GHz bands for poketqubes 

      Alcántara Villaverde, Adrián (Universitat Politècnica de Catalunya, 2022-07-05)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      The project developed in this thesis consists of creating a PocketQube payload in charge of monitoring the 24 to 25 GHz band to enforce that the emissions of the 5G communications band are within limit. In this thesis, the ...

    • Determination of sea surface salinity and wind speed by L-band microwave radiometry from a fixed platform 

      Gabarró Prats, Carolina; Vall-Llossera Ferran, Mercedes Magdalena; Font, Jordi; Camps Carmona, Adriano José (TAYLOR & FRANCIS LTD, 2004-01-31)
      Article
      Accés obert
      The European Space Agency Soil Moisture and Ocean Salinity (SMOS) mission aims at obtaining global maps of soil moisture and sea surface salinity from space for large-scale and climatic studies. It uses an L-band ...

    • 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)
      Text en actes de congrés
      Accés obert

    • Feasibility analysis of a DIAL system for gas sensing 

      Giménez Aragón, Sara (Universitat Politècnica de Catalunya, 2023-09-07)
      Projecte Final de Màster Oficial
      Accés obert
      This article introduces a MATLAB-based radiometric model as a crucial initial step in evaluating the feasibility Differential Absorption Lidar (DIAL) systems for remote sensing of minor gaseous atmospheric constituents ...

    • 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)
      Text en actes de congrés
      Accés obert
      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)
      Text en actes de congrés
      Accés obert
      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 ...

    • Improvement of SMOS radiometric accuracy for salinity retrieval applications 

      Vizcarro I Carretero, Marc (Universitat Politècnica de Catalunya, 2016-07-13)
      Treball Final de Grau
      Accés obert
      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 ...

    • L-band radiometry: data processing and emissivity models for Arctic sea-ice 

      Fabregat Carrascal, Pau (Universitat Politècnica de Catalunya, 2021-03-04)
      Treball Final de Grau
      Accés obert
      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, ...

    • Obtención de imágenes de la superficie terrestre y marina mediante radiometría de microondas 

      Broquetas Ibars, Antoni; Jofre Roca, Lluís (1991)
      Text en actes de congrés
      Accés obert

    • Optimum intercalibration time in synthetic aperture interferometric radiometers: application to SMOS 

      Ramos Pérez, Isaac; Bosch Lluís, Xavier; Camps Carmona, Adriano José; González Gambau, Veronica; Rodríguez Álvarez, Nereida; Valencia Domènech, Enric; Hyuk, Park; Vall-Llossera Ferran, Mercedes Magdalena; Forte Veliz, Giuseppe Francesco (2012)
      Article
      Accés restringit per política de l'editorial
      Interpolation strategies for calibration of the Soil Moisture and Ocean Salinity (SMOS) mission of the European Space Agency are tested and compared. Calibration strategy (how and how often) is critical in achieving the ...

    • Quantifying and reducing uncertainty in microwave vegetation optical depth and soil moisture retrievals 

      Feldman, Andrew F.; Chaparro Danon, David; Entekhabi, Dara (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Soil moisture and vegetation optical depth (VOD; related to vegetation water content) retrieved from SMAP and SMOS satellites are widely used for a range of hydrosphere and biosphere applications. However, while soil ...

    • SMOS CP34 soil moisture and ocean salinity maps 

      Font Ferré, Jordi; Gabarró Prats, Carolina; Ballabrera Poy, Joaquim; Turiel Martínez, Antonio; Martínez, Justino; Umbert, M.; Pérez, Francisco C.; Hoareau, N.; Portabella, M.; González Gambau, Veronica; Gourrion, J.; Guimbard, S.; Piles Guillem, Maria; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents the soil moisture and ocean salinity maps from the SMOS mission generated operationally by the Spanish SMOS Level 3 and 4 data processing center (CP34) and experimentally by the SMOS Barcelona Expert ...

    • SMOS L3 salinity performances at decreasing sea surface temperature 

      Sabia, R.; Fernández Prieto, D.; Portabella, M.; Gourrion, J.; Font Ferré, Jordi; Talone, Marco; Camps Carmona, Adriano José (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A study of the latitudinal trend of the retrieved salinity performances along a Southwards transect has been performed, analyzing the trade-off between geophysical effects in cold seawater and the concomitant temporal ...

    • Soil moisture estimation synergy using GNSS-R and L-Band microwave radiometry data from FSSCat/FMPL-2 

      Muñoz Martin, Joan Francesc; Llaveria Godoy, David; Herbert, Christoph Josef; Pablos Hernández, Miriam; Hyuk, Park; Camps Carmona, Adriano José (Multidisciplinary Digital Publishing Institute (MDPI), 2021-03-05)
      Article
      Accés obert
      The Federated Satellite System mission (FSSCat) was the winner of the 2017 Copernicus Masters Competition and the first Copernicus third-party mission based on CubeSats. One of FSSCat’s objectives is to provide coarse Soil ...

    • Strategies using time-domain measurements for radiated emissions testing in harsh environments 

      Solé Lloveras, Jordi; Azpúrua Auyanet, Marco Aurelio; Yoshioka, Yasutoshi; Silva Martínez, Fernando (2023-08-10)
      Article
      Accés obert
      Performing in-situ radiated emissions measurements, that is, in locations different from a standard test site, can be a challenging task because of the high electromagnetic noise levels in the ambient. A harsh electromagnetic ...

    • Untangling the GNSS-R coherent and incoherent components: Experimental evidences over the ocean 

      Muñoz Martin, Joan Francesc; Onrubia Ibáñez, Raul; Pascual Biosca, Daniel; Hyuk, Park; Camps Carmona, Adriano José; Rudiger, Christoph; Walker, Jeffrey; Monerris Belda, Alessandra (2020)
      Text en actes de congrés
      Accés obert
      Global Navigation Satellite Systems Reflected (GNSS-R) signals exhibit an incoherent and a coherent components [1], [2]. Current models assume that one or the other are dominant, and the calibration, and geophysical parameter ...