Exploració per tema "Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció"

Ara es mostren els items 21-40 de 677

    • A multi-frequency FMCW GBSAR: system description and first results 

      Amézaga Sarries, Adrià; López Martínez, Carlos; Jové Casulleras, Roger (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      This paper provides a high level overview of a multi-frequency Ground-Based Synthetic Aperture Radar operating at X-, C-, L- and P-bands. The system core is implemented using a flexible high performance Software Defined ...

    • A neural network approach to predict the ionospheric scintillation Wbmod model variables 

      Molina Ordóñez, Carlos; Boudriki Semlali, Badr Eddine; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Comunicació de congrés
      Accés obert
      The ionospheric scintillation can be explained as the fluctuations in the phase and intensity of electromagnetic rays after crossing the ionosphere. Rino’s theory was proposed in 1979 to quantify this scintillation, and ...

    • A new approach to DInSAR pixel selection with a combined multi resolution selection method 

      Centolanza, Giuseppe; Iglesias González, Rubén; Monells Miralles, Daniel; Mallorquí Franquet, Jordi Joan (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In DInSAR processing it is possible to detect different kinds of targets at different resolutions. Point like scatters can be selected with high resolution selection methods, like amplitude dispersion. Distributed scatters ...

    • A new approach to DInSAR pixel selection with spectral correlation along time between Sublooks 

      Iglesias González, Rubén; Monells Miralles, Daniel; Centolanza, Giuseppe; Mallorquí Franquet, Jordi Joan (2012)
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      This paper presents a full resolution pixel selection method, alternative to the traditional ones, which is based on the study of the spectral correlation coefficient along time among different Sublooks of the image ...

    • A Novel Algorithm for Ship Detection in SAR Imagery Based on the Wavelet Transform 

      Tello Alonso, Mª Victoria; López Martínez, Carlos; Mallorquí Franquet, Jordi Joan (IEEE, 2005-04-30)
      Article
      Accés obert
      Carrying out an effective control of fishing activities is essential to guarantee a sustainable exploitation of sea resources. Nevertheless, as the regulated areas are extended, they are difficult and time consuming to ...

    • A novel digital IQ demodulation for interferometric radiometers 

      Corbella Sanahuja, Ignasi; Martín Neira, Manuel; Vilaseca, Roger; Catalán Artigas, Albert; Torres Torres, Francisco; Suess, Martin (Multidisciplinary Digital Publishing Institute (MDPI), 2021-03-02)
      Article
      Accés obert
      In the frame of an SMOS follow-on operational mission, a new instrument design is being developed based on the lessons learned from MIRAS, the SMOS payload. To reduce hardware complexity and mass, digital In-phase Quadrature ...

    • A novel dissemination protocol to deploy opportunistic services in federated satellite systems 

      Ruiz De Azúa Ortega, Juan Adrián; Calveras Augé, Anna M.; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2020-08-03)
      Article
      Accés obert
      The Earth Observation community is demanding new satellite applications that cover the need of monitoring different areas with high spatial resolution and short revisit times. These applications will generate huge amounts ...

    • A numerical simulator to evaluate the electromagnetic bias in GNSS-R altimetry 

      Ghavidel, Ali; Schiavulli, Domenico; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper presents the computed electromagnetic (EM) bias predicted for GNSS-R altimetry systems. First, a synthetic time-evolving sea surface is generated satisfying an ocean surface height spectrum. Then, a direct GNSS ...

    • A physical analysis of polarimetric SAR data statistical models 

      Deng, Xinping; López Martínez, Carlos; Varona, Eduardo Makhoul (Institute of Electrical and Electronics Engineers (IEEE), 2016-01-08)
      Article
      Accés obert
      The random walk model is studied with the objective to obtain a physical explanation for the texture of polarimetric synthetic aperture radar (SAR) data. A simulator is designed to imitate the scattering process under ...

    • A polarimetric approach to marine litter detection using GNSS-reflectometry in a controlled flume 

      Pérez Portero, Adrián; Gonga i Siles, Amadeu; Camps Carmona, Adriano José; Pascual Biosca, Daniel; de Fockert, Anton; de Maagt, Peter (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
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      Over 14 million tons of plastic end up yearly in the ocean, originating from polluted waterways such as rivers, sewers, or storm waters, or from industrial and nautical activities with improper garbage disposal methods. ...

    • A random forest approach for soil moisture estimation at 60 meters spatial resolution 

      Portal González, Gerard; Vall-Llossera Ferran, Mercedes Magdalena; López Martínez, Carlos; Camps Carmona, Adriano José; Pablos Hernández, Miriam; Chaparro Danon, David; Irawan, Amir Mustofa; Alonso González, Alberto; Jagdhuber, Thomas (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
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      A Random Forest (RF) regression-tree method to derive high-resolution (60 m) surface soil moisture maps is proposed in this study. The developed methodology integrates multi-source synergies by incorporating information ...

    • A Robust Adaptive Unscented Kalman Filter for floating Doppler Wind-LiDAR motion correction 

      Salcedo Bosch, Andreu; Rocadenbosch Burillo, Francisco; Sospedra Iglesias, Joaquim (Multidisciplinary Digital Publishing Institute (MDPI), 2021-10-18)
      Article
      Accés obert
      This study presents a new method for correcting the six degrees of freedom motion-induced error in ZephIR 300 floating Doppler Wind-LiDAR-derived data, based on a Robust Adaptive Unscented Kalman Filter. The filter takes ...

    • A spatially consistent downscaling approach for SMOS using an adaptive window 

      Portal González, Gerard; Vall-Llossera Ferran, Mercedes Magdalena; Piles de la Fuente, María Pilar; Camps Carmona, Adriano José; Chaparro Danon, David; Pablos Hernández, Miriam; Rossato, Luciana (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The ESA's Soil Moisture and Ocean Salinity (SMOS, 2009-2017) is the first mission using L-band radiometry to monitor the Earth's global surface soil moisture (SM). After more than 7 years in orbit, many studies have ...

    • A stratospheric balloon GNSS-R experiment: The 3Cat-2 project in DLR/SNSB BEXUS 

      Carreño Luengo, Hugo; Camps Carmona, Adriano José; Querol Borràs, Jorge; Forte Veliz, Giuseppe Francesco; Onrubia Ibáñez, Raúl; Díez, Raúl (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Universitat Politècnica de Catalunya (UPC) - BarcelonaTech Remote Sensing Laboratory focus on the development of breakthrough concepts. The 3Cat-2 mission is on the synergy of GNSS reflectometry and the CubeSat concept. ...

    • A temporal phase coherence estimation algorithm and its application on DInSAR pixel selection 

      Zhao, Feng; Mallorquí Franquet, Jordi Joan (Institute of Electrical and Electronics Engineers (IEEE), 2019-11-01)
      Article
      Accés obert
      Pixel selection is a crucial step of all advanced Differential Interferometric Synthetic Aperture Radar (DInSAR) techniques that have a direct impact on the quality of the final DInSAR products. In this paper, a full-resolution ...

    • A two-dimensional doppler-radiometer for earth observation 

      Camps Carmona, Adriano José; Swift, Calvin T. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-07-31)
      Article
      Accés obert
      Compared to synthetic aperture radars (SARs), the angular resolution of microwave radiometers is quite poor. Traditionally, it has been limited by the physical size of the antenna. However, the angular resolution can be ...

    • A unified formulation for the computation of the six-degrees-of-freedom-motion-induced errors in floating Doppler wind LiDARs 

      Salcedo Bosch, Andreu; Farré Guarné, Joan; Silva, Marcos Paulo Aráujo da; Rocadenbosch Burillo, Francisco (Multidisciplinary Digital Publishing Institute (MDPI), 2023-03-07)
      Article
      Accés obert
      This work presents an analytical formulation to assess the six-degrees-of-freedom-motion-induced error in floating Doppler wind LiDARs (FDWLs). The error products derive from the horizontal wind speed bias and apparent ...

    • A wind speed and fluctuation simulator for characterizing the wind lidar correlation method 

      Tomás, S; Sicard, Michaël; Masjuan, J; Md. Reba, Mohd Nadzri; Muñoz Porcar, Constantino; Rocadenbosch Burillo, Francisco (2007)
      Text en actes de congrés
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      Aerosol distribution in the atmosphere is used as a wind-tracer by lidars since it is drifted by the wind and respond to its changes. Two methods are used: the correlation and the Doppler method. This first one is easier ...

    • About the potential of lidars with different photodetectors under daytime sky radiation 

      Agishev, Ravil R.; Comerón Tejero, Adolfo; Gilerson, Alexander (2015)
      Text en actes de congrés
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      Results of theoretical analysis and experimental developments implemented as advanced methods and means to improve a noise-immunity of lidar systems for practical applications are discussed. A particular attention is paid ...

    • Accurate and automatic NOAA-AVHRR image navigation using a global contour matching approach 

      Eugenio, F; Marqués Acosta, Fernando; Gómez, L; Suarez, E; Rovaris, E (2000)
      Text en actes de congrés
      Accés obert
      The problem of precise and automatic AVHRR image navigation is tractable in theory, but has proved to be somewhat difficult in practice. The authors' work has been motivated by the need for a fully automatic and operational ...