Browsing by Author "López Martínez, Carlos"Més informacióMés informació

Now showing items 1-20 of 151

    • 60-m resolution soil moisture estimation based on a multisensor feedforward neural network model 

      Portal González, Gerard; Vall-Llossera Ferran, Mercedes Magdalena; López Martínez, Carlos; Camps Carmona, Adriano José; Pablos Hernández, Miriam; Alonso González, Alberto; Jagdhuber, Thomas; Irawan, Amir Mustofa (Institute of Electrical and Electronics Engineers (IEEE), 2024)
      Article
      Open Access
      Understanding soil moisture (SM) at high spatio-temporal resolution provides crucial insights across various societal disciplines due to its direct impact on environmental and natural disaster monitoring, weather forecasting, ...

    • A feedforward neural network for ESA CCI soil moisture disaggregation 

      Portal González, Gerard; Vall-Llossera Ferran, Mercedes Magdalena; López Martínez, Carlos; Camps Carmona, Adriano José; Alonso González, Alberto; Irawan, Amir Mustofa; Pablos Hernández, Miriam (Institute of Electrical and Electronics Engineers (IEEE), 2024)
      Conference report
      Open Access
      This study presents a methodology for disaggregating the ESA Climate Change Initiative (CCI) Soil Moisture (SM) maps from 0.25° to a 60 m grid, using a feedforward neural network. This technique is applied over an area of ...

    • A maximum likelihood analysis of the RVoG model for forestry studies in polarimetric SAR interferometry 

      López Martínez, Carlos; Alonso González, Alberto (European Space Agency (ESA), 2013)
      Conference report
      Restricted access - publisher's policy
      This work analyses the validity of the RVoG model as- sumption in case of PolInSAR data in forestry analy- sis. In order to assure that the interferometric coherence describes a line, as imposed by the RVoG model, ...

    • A model-free four component scattering power decomposition for polarimetric SAR data 

      Dey, Subhadip; Bhattacharya, Avik; Frery, Alejandro C.; López Martínez, Carlos; Rao, Yalamanchili S. (Institute of Electrical and Electronics Engineers (IEEE), 2021-03-29)
      Article
      Open Access
      Target decomposition methods of polarimetric Synthetic Aperture Radar (PolSAR) data explain scattering information from a target. In this regard, several conventional model-based methods utilize scattering power components ...

    • 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)
      Conference report
      Open Access
      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 multi-frequency SDR-based GBSAR: System overview and first results 

      Amézaga Sarries, Adrià; López Martínez, Carlos; Jové Casulleras, Roger (Multidisciplinary Digital Publishing Institute (MDPI), 2021-04-21)
      Article
      Open Access
      This work describes a system-level overview of a multi-frequency GBSAR built around a high performance software defined radio (SDR). The main goal of the instrument is to be employed as a demonstrator and experimental ...

    • 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
      Open Access
      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 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
      Open Access
      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 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)
      Conference report
      Open Access
      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 ...

    • Actividades del grupo EEF en el contexto de la red europea TMR "Polarimetría radar: teoría y aplicaciones" 

      Fabregas Canovas, Francisco Javier; López Martínez, Carlos; Sagués Piella, Lluís; Broquetas Ibars, Antoni (2000)
      Conference report
      Open Access
      The activity of the EEF group in the TMR European Project Radar Polarimetry: Theory and Applications will be presented in this paper. We have developed new polarimetric-interferometric retrieval algorithms and enhancement ...

    • Activities of the IEEE GRSS Spain Chapter 

      Marcello, Javier; Piles de la Fuente, María Pilar; Camps Valls, Gustau; López Martínez, Carlos; Álvarez Pérez, José Luis; Plaza Miguel, Antonio (Institute of Electrical and Electronics Engineers, 2019-06-01)
      Article
      Open Access
      Presents information on various GRSS Society chapters

    • Advanced polarimetric optimization for DInSAR applications with Ground-Based SAR 

      Iglesias González, Rubén; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto; López Martínez, Carlos; Alonso González, Alberto (2012)
      Conference report
      Restricted access - publisher's policy
      In this paper, the applications of advanced polarimetric optimization techniques for Differential Interferometric SAR (DInSAR) pixel selection are explored in the framework of deformation map retrieval in landslides. ...

    • Advances in multidimensional synthetic aperture radar signal processing 

      López Martínez, Carlos; Ferro-Famil, Laurent; Reigber, Andreas (2010)
      Article
      Open Access

    • AI4WATER: a digital twin for irrigated agriculture 

      Camps Carmona, Adriano José; López Martínez, Carlos; Gonga i Siles, Amadeu; Gràcia i Solà, Guillem; Pérez Portero, Adrián; Alonso González, Alberto; Vall-Llossera Ferran, Mercedes Magdalena; Hyuk, Park; Pérez Gracia, María de la Vega; Caselles Magallón, Josep Oriol; Domènech Mestres, Carles; Català Calderon, Pau; Ruiz De Azúa Ortega, Juan Adrián; Solsona Rullo, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2024)
      Conference report
      Open Access
      This study presents a Digital Twin (DT) that is being created to optimize the use of the available hydric resources, and mitigate the effects of the increasing water shortage in irrigated agriculture in fields in the Urgell ...

    • An assessment of SAOCOM L-Band PolInSAR capabilities for canopy height estimation: A case study over managed forests in Argentina 

      Seppi, Santiago Ariel; López Martínez, Carlos; Joseau, Marisa Jacqueline (Institute of Electrical and Electronics Engineers (IEEE), 2024-02-07)
      Article
      Open Access
      This work presents the first results of canopy height mapping with L -Band SAOCOM data by means of Polarimetric SAR Interferometry (PolInSAR). For this study case, a colocated temporal series of SAOCOM fully polarimetric ...

    • An evaluation of PolSAR speckle filters on compact-pol images 

      Foucher, Samuel; Landry, Tom; López Martínez, Carlos; Charbonneau, François; Gagnon, Langis (IEEE, 2012)
      Conference report
      Restricted access - publisher's policy
      The goal of this study is to evaluate some polarimetric speckle filters when applied to Compact Polarimetry (CP) data. Seven filters are evaluated on a set of artificial CP images. Performances regarding image restoration ...

    • Analysis and definition of the AI4EO sector in Catalonia: policies, ecosystem and future 

      Herrera Giménez, Marc; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2024)
      Conference report
      Open Access
      Catalonia has historically positioned itself as an innovative region committed to pioneering technological advancements. From the industrial revolution in the early 20th century to contemporary pursuits in the Space and ...

    • Analysis and validity of the polInSAR line model on forested areas 

      López Martínez, Carlos; Fabregas Canovas, Francisco Javier; Alonso González, Alberto (2012)
      Conference report
      Restricted access - publisher's policy
      This paper focuses on the analysis of certain hypotheses considered in quantitative remote sensing of forest areas by means of Polarimetric SAR Interferometry (PolInSAR). When addressing the quantitative estimation of ...

    • Analysis of ASAR/Envisat polarimetric backscattering characteristics of Doñana National Park wetlands 

      Martí Cardona, Belén; López Martínez, Carlos; Dolz Ripollès, Josep (Institute of Electrical and Electronics Engineers, 2009)
      Conference report
      Open Access
      Doñana National Park wetlands, in southwest Spain, undergo yearly cycles of inundation and drying out. These cycles, together with great extensions of annual helophytes, make of Doñana a rapidly changing environment. 43 ...

    • Analysis of volumetric scatters based on TanDEM-X polarimetric interferometric SAR data 

      López Martínez, Carlos; Alonso González, Alberto; Fabregas Canovas, Francisco Javier; Papathanassiou, Kostantinos (IEEE, 2011)
      Conference report
      Restricted access - publisher's policy
      Polarimetric SAR Interferometry makes possible a detailed analysis of the volumetric scattering processes present in microwave scattering in case of forest areas. In previous contributions, the authors, under the hypothesis ...