Exploració per tema "Vegetation mapping"

Ara es mostren els items 1-17 de 17

    • Advanced processing of multiplatform remote sensing imagery for the monitoring of coastal and mountain ecosystems 

      Marcello Ruiz, Javier; Eugenio González, Francisco; Gonzalo Martín, Consuelo; Rodríguez Esparragón, Dionisio; Marqués Acosta, Fernando (Institute of Electrical and Electronics Engineers (IEEE), 2021)
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      Accés obert
      Coastal areas are key to sustaining biodiversity, but their complexity and variability makes their analysis challenging. On the other hand, mountain ecosystems include a large percentage of the global biodiversity and their ...

    • Can we measure vegetation water content and vegetation opacity at L-band with a single GPS receiver? 

      Alonso Arroyo, Alberto; Querol Borràs, Jorge; Camps Carmona, Adriano José; Onrubia Ibáñez, Raúl; Hyuk, Park; Pascual Biosca, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      This work shows a technique to estimate the vegetation opacity and infer the vegetation water content using a single GPS receiver located under the vegetation layer being analyzed. It is based on the measurement of the ...

    • Downscaling SMOS-derived soil moisture using MODIS visible/infrared data 

      Piles, Maria; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; Corbella Sanahuja, Ignasi; Panciera, Rocco; Ruediger, Christoph; Kerr, Yann H.; Walker, Jeffrey (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-09)
      Article
      Accés restringit per política de l'editorial
      A downscaling approach to improve the spatial resolution of Soil Moisture and Ocean Salinity (SMOS) soil moisture estimates with the use of higher resolution visible/infrared (VIS/IR) satellite data is presented. The ...

    • Error propagation in microwave soil moisture and vegetation optical depth retrievals 

      Feldman, Andrew F.; Chaparro Danon, David; Entekhabi, Dara (2021-01-01)
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      Accés obert
      Satellite soil moisture and vegetation optical depth [(VOD); related to the total vegetation water mass per unit area] are increasingly being used to study water relations in the soil-plant continuum across the globe. ...

    • Extraction of vegetation structure and surface parameters using polarimetric and interferometric SAR techniques 

      Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 2000)
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      Presents different polarimetric and interferometric inversion radar approaches to extract the characteristics of vegetation and bare soil surfaces. The inversion techniques presented make use of multifrequency, radar ...

    • Fusion of optical and SAR satellite data for environmental monitoring: assessment of damages and disturbances originated by forest fires 

      Alparone, Luciano; Arienzo, Alberto; Garzelli, Andrea; Lolli, Simone; Zoppetti, Claudia (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
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      In this paper, we propose a processing chain jointly employing Sentinel-1 and Sentinel-2 data aimed at monitoring changes in the status of the vegetation cover by integrating the four visible and near infrared (VNIR) bands ...

    • Generic performance simulator of spaceborne GNSS-Reflectometer for land applications 

      Hyuk, Park; Camps Carmona, Adriano José; Castellví Esturi, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2020-01-01)
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      Accés obert
      Nowadays, the space missions employing the global navigation satellite system reflectometry (GNSS-R) are UK TDS-1, NASA CYGNSS, and the Chinese BuFeng-1A/B twin satellites, part of the first Chinese global navigation ...

    • Hierarchical segmentation of vegetation areas in high spatial resolution images by fusion of multispectral information 

      Calderero Patino, Felipe; Marqués Acosta, Fernando; Marcello, Javier; Eugenio, Francisco Javier (2009)
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      A new region-based methodology for the automated extraction and hierarchical segmentation of vegetation areas into high spatial resolution images is proposed. This approach is based on the iterative and cooperative ...

    • Hydrosoil, soil moisture and vegetation parameters retrieval with a C-Band GB-SAR: Campaign implementation and first results 

      Aguasca Solé, Alberto; Broquetas Ibars, Antoni; Fabregas Canovas, Francisco Javier; Mallorquí Franquet, Jordi Joan; Vilalvilla Ornat, Pol; Biscamps Dalmau, Jordi; Llop Casamada, Jordi; Gallart González-Palacio, Montserrat; Gil Moya, Emilio; Gras Moreu, Anna Maria (Institute of Electrical and Electronics Engineers (IEEE), 2021)
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      HydroSoil is a measurement campaign, funded by the European Space Agency (ESA), where the temporal evolutions of two crops, barley and corn, have been continuously monitored during the whole crop period by means of a C-band ...

    • Impact of incidence angle diversity on SMOS and sentinel-1 soil moisture retrievals at coarse and fine scales 

      Portal González, Gerard; Vall-Llossera Ferran, Mercedes Magdalena; Piles Guillem, María; Jagdhuber, Thomas; Camps Carmona, Adriano José; Pablos Hernández, Miriam; López Martínez, Carlos; Das, Narendra; Entekhabi, Dara (Institute of Electrical and Electronics Engineers (IEEE), 2022-01-01)
      Article
      Accés obert
      Incidence angle diversity of space-borne radiometer and radar systems operating at low microwave frequencies needs to be taken into consideration to accurately estimate soil moisture (SM) across spatial scales. In this ...

    • Mapping carbon stocks in Central and South America with smap vegetation optical depth 

      Chaparro Danon, David; Duveiller, Gregory; Piles, María; Vall-Llossera Ferran, Mercedes Magdalena; Cescatti, A.; Camps Carmona, Adriano José; Entekhabi, Dara (Institute of Electrical and Electronics Engineers (IEEE), 2019)
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      Mapping carbon stocks in the tropics is essential for climate change mitigation. Passive microwave remote sensing allows estimating carbon from deep canopy layers through the Vegetation Optical Depth (VOD) parameter. ...

    • SMOS REFLEX 2003: L-Band Emissivity Characterization of Vineyards 

      Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Monerris Belda, Alessandra; Sabia, Roberto; Selva Valero, Daniel; Antolín, Carmen; López Baeza, Ernesto; Ferrer, Joan Ferran; Saleh, Kauzar (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-05-31)
      Article
      Accés obert
      The goal of the Soil Moisture and Ocean Salinity mission over land is to infer surface soil moisture from multiangular L-band radiometric measurements. As the canopy affects the microwave emission of land, it is necessary ...

    • Study of land surface temperature anomalies associated to earthquakes using GOES data 

      Boudriki Semlali, Badr Eddine; Molina Ordóñez, Carlos; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2022)
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      Annually, earthquakes cause human and material losses. For instance, between 1998 and 2018, 846 thousand deaths and about US$ 661 billion of economic losses were recorded due to earthquakes. Currently, there is no clear ...

    • Surface topography and mixed-pixel effects on the simulated L-band brightness temperatures. 

      Talone, Marco; Camps Carmona, Adriano José; Monerris Belda, Alessandra; Vall-Llossera Ferran, Mercedes Magdalena; Ferrazzoli, P.; Piles, Maria (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-07-31)
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      Accés obert
      The impact of topography and mixed pixels on L-band radiometric observations over land needs to be quantified to improve the accuracy of soil moisture retrievals. For this purpose, a series of simulations has been performed ...

    • The potential of spaceborne GNSS reflectometry for soil moisture, biomass, and freeze–thaw monitoring: Summary of a European Space Agency-funded study 

      Pierdicca, Nazzareno; Comite, Davide; Camps Carmona, Adriano José; Carreño Luengo, Hugo; Cenci, Luca; Clarizia, Maria Paola; Costantini, Fabiano; Dente, Laura; Guerriero, Leila; Mollfulleda, Antonio; Paloscia, Simonetta; Hyuk, Park; Santi, Emanuele; Zribi, Mehrez; Floury, Nicolas (Institute of Electrical and Electronics Engineers (IEEE), 2022-06)
      Article
      Accés obert
      This work presents an overview of the activity developed in the frame of a project funded by the European Space Agency (ESA). The research was focused on the study of the potential applications of GNSS Reflectometry (GNSS- ...

    • Underlying topography estimation and separation of scattering contributions over forests based on polInSAR data 

      López Martínez, Carlos; Alonso González, Alberto; Fabregas Canovas, Francisco Javier; Papathanassiou, Kostantinos (2011)
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      The work detailed in this paper analyzes the topographic phase retrieval process on forested areas by means of Polarimetric Interferometric SAR data. On the basis of the Random Volume over Ground scattering model, an ...