Ara es mostren els items 1-20 de 164

    • A downscaling approach for SMOS land observations: evaluation of high-resolution soil moisture maps over the Iberian Peninsula 

      Piles Guillem, Maria; Sanchez, Nilda; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Martinez Fernandez, Jose; Martinez, Justino; González Gambau, Veronica (2014-09-01)
      Article
      Accés restringit per política de l'editorial
      The ESA's Soil Moisture and Ocean Salinity (SMOS) mission is the first satellite devoted to measure the Earth's surface soil moisture. It has a spatial resolution of similar to 40 km and a 3-day revisit. In this paper, a ...
    • A downscaling approach to combine SMOS multi-angular and full-polarimetric observations with MODIS VIS/IR data into high resolution soil moisture maps 

      Piles Guillem, Maria; Vall-Llossera Ferran, Mercedes Magdalena; Laguna, Laia; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2012)
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      A downscaling algorithmfor SMOS which combines MODIS Visible/Infrared data and SMOS horizontal brightness temperatures at 42.5◦ incidence angle into high-resolution soil moisture maps has been shown to nicely reproduce ...
    • A modified downscaling approach to estimate SMOS soil moisture at high resolution (300 M) using Copernicus Sentinel 3 NDVI 

      Pablos Hernández, Miriam; Portal González, Gerard; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; González-Haro, Cristina; Portabella Arnus, Marcos (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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      A modification of the Barcelona Expert Center (BEC) algorithm to downscale the Soil Moisture and Ocean Salinity (SMOS) soil moisture (SM) to 300 m spatial resolution is presented. It maintains the same functional relationship ...
    • A new space technology for ocean observation: the SMOS mission 

      Font Ferré, Jordi; Ballabrera Poy, Joaquim; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Durán Martínez, Israel; Emelianov Kolomitski, Mikhail; Enrique González, Luis; Fernández Gallego, Pedro; Gabarró Prats, Carolina; González, Cristina; González, Veronica; Gourrion, J.; Guimbard, S.; Hoareau, N.; Julià, A; Kalaroni, S.; Konstantinidou, Anna; Aretxabaleta, L.; Martínez, Justino; Miranda, Jorge Miguel; Monerris Belda, Alessandra; Montero, Sergio; Mourre, B.; Pablos Hernández, Miriam; Pérez Villar, Fernando; Piles Guillem, Maria; Portabella, M.; Sabia, R.; Salvador, Joaquin; Talone, Marco; Torres Torres, Francisco; Turiel Martínez, Antonio; Vall-Llossera Ferran, Mercedes Magdalena; Villarino Villarino, Ramón (2012)
      Article
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      Capability for sea surface salinity observation was an important gap in ocean remote sensing in the last few decades of the 20th century. New technological developments during the 1990s at the European Space Agency led to ...
    • 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)
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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 sensitivity study of land surface temperature to soil moisture using in-situ and spaceborne observations 

      Pablos Hernández, Miriam; Piles Guillem, Maria; Sanchez, Nilda; Gonzalez Gambau, Verónica; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Martinez Fernandez, Jose (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      Surface Soil Moisture (SSM) affects the soil surface energy balance and thus affects the Land Surface Temperature (LST), and viceversa. Currently, LST and SSM are remotely sensed using TIR sensors and L-band radiometers, ...
    • 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)
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      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 ...
    • Airborne GNSS-R, thermal and optical data relationships for soil moisture retrievals 

      Sánchez, Nilda; Alonso Arroyo, Alberto; González Zamora, Ángel; Martinez Fernandez, Jose; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; Pablos Hernández, Miriam; Herrero Jimenez, Carlos M. (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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      New remote sensing techniques based on the analysis of the Earth's surface-reflected signal from the Global Navigation Satellite Systems (GNSS-Reflectometry, or GNSS-R in short) are emerging. Soil moisture and vegetation ...
    • Altimetry study performed using an airborne GNSS-reflectometer 

      Rodríguez Álvarez, Nereida; Acevo Herrera, René; Aguasca Solé, Alberto; Valencia Domènech, Enric; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; Bosch Lluís, Xavier; Ramos Pérez, Isaac (2010)
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      The Global Navigation Satellite Signals Reflections (GNSSR)techniques have been widely used for remote sensing purposes retrieving geophysical parameters over different types of surfaces. Over the ocean, altimetry or sea ...
    • An airborne GNSS-R field experiment over a vineyard for soil moisture estimation and monitoring 

      Alonso Arroyo, Alberto; Camps Carmona, Adriano José; Sanchez, Nilda; Pablos Hernández, Miriam; González Zamora, Ángel; Martinez Fernandez, Jose; Vall-Llossera Ferran, Mercedes Magdalena; Pascual, D. (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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      The Light Airborne Reflectometer for GNSS-R Observations (LARGO) is an airborne instrument designed for measuring the coherent reflectivity from different soils. In this work, an improved version of LARGO has been used in ...
    • An evaluation of soil moisture downscaling techniques using L.Band Airbone observations 

      Piles, María; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Talone, Marco (SARTI (Technological Development Centre of Remote Acquisition and Data processing Systems), 2010-04-13)
      Article
      Accés obert
    • Analysis of Correlation and Total Power Radiometer Front-Ends Using Noise Waves 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Rautiainen, Kimmo; Martín Neira, Manuel; Colliander, Andreas (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-11-30)
      Article
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      A complete and systematic noise analysis of radiometer front-ends, including both total power and correlation measurements, is presented. The procedure uses the concepts of noise waves and S-parameters, widely used in ...
    • Analysis of correlation and total power radiometer front-ends using noise waves 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Rautiainen, Kimmo; Martín Neira, Manuel; Colliander, Andreas (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-11-30)
      Article
      Accés obert
      A complete and systematic noise analysis of radiometer front-ends, including both total power and correlation measurements, is presented. The procedure uses the concepts of noise waves and S-parameters, widely used in ...
    • Analyzing spatio-temporal factors to estimate the response time between SMOS and in-situ soil moisture at different depths 

      Herbert, Christoph Josef; Pablos Hernández, Miriam; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Martinez Fernandez, Jose (Multidisciplinary Digital Publishing Institute (MDPI), 2020-08-13)
      Article
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      A comprehensive understanding of temporal variability of subsurface soil moisture (SM) is paramount in hydrological and agricultural applications such as rainfed farming and irrigation. Since the SMOS (Soil Moisture and ...
    • Análisis de antenas de reflector mediante procesado gráfico 

      Vall-Llossera Ferran, Mercedes Magdalena; Salazar, C; Rius Casals, Juan Manuel; Cardama Aznar, Ángel (Universidad de Valladolid, 1995)
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      The aim of this article is to show a new technique for calculating the Radiation Pattern of arbitrary geometry reflector antennas. We use the Graphical processing technique developed in this group for Radar Cross Section ...
    • Aplicación de algortimos gráfico de iluminación global al cálculo de interacción electromagnética entre superficies metálicas 

      Vall-Llossera Ferran, Mercedes Magdalena; Rius Casals, Juan Manuel; Ferrando Bataller, Miquel (Unión Científica Internacional de Radio (URSI), 1990)
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    • Aplicación del modelado geométrico a problemas de difracción electromagnética 

      Vall-Llossera Ferran, Mercedes Magdalena (Universitat Politècnica de Catalunya, 1994-03-01)
      Tesi
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      En esta tesis se estudia el problema de modelado geométrico de objetos arbitrarios para aplicaciones de análisis electromagnético. El objetivo principal ha sido el desarrollo de un proceso completo, lo mas general posible, ...
    • Assessment of multi-scale SMOS and SMAP soil moisture products across the Iberian Peninsula 

      Portal González, Gerard; Jagdhuber, Thomas; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Pablos Hernández, Miriam; Entekhabi, Dara; Piles, María (Multidisciplinary Digital Publishing Institute (MDPI), 2020-02-01)
      Article
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      In the last decade, technological advances led to the launch of two satellite missions dedicated to measure the Earth’s surface soil moisture (SSM): the ESA’s Soil Moisture and Ocean Salinity (SMOS) launched in 2009, and ...
    • Bayesian unsupervised machine learning approach to segment arctic sea ice using SMOS data 

      Herbert, Christoph Josef; Camps Carmona, Adriano José; Wellmann, Florian; Vall-Llossera Ferran, Mercedes Magdalena (2021-03-28)
      Article
      Accés obert
      Microwave radiometry at L-band is sensitive to sea ice thickness (SIT) up to ~ 60 cm. Current methods to infer SIT depend on ice-physical properties and data provided by the ESA’s Soil Moisture and Ocean Salinity (SMOS) ...
    • Boundary element method applied to polarimetric radiometry of rain events 

      Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Torres Torres, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2000)
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