Enviaments recents

  • Toward estimation of seasonal water dynamics of winter wheat from ground-based L-band radiometry: a concept study 

    Jagdhuber, Thomas; Jonard, François; Fluhrer, Anke; Chaparro Danon, David; Baur, Martin J.; Meyer, Thomas; Piles Guillem, María (2022-04-28)
    Article
    Accés obert
    The vegetation optical depth (VOD) variable contains information on plant water content and biomass. It can be estimated alongside soil moisture from currently operating satellite radiometer missions, such as SMOS (ESA) ...
  • Vegetation canopy height retrieval using L1 and L5 airborne GNSS-R 

    Muñoz Martínez, Francisco José; Pascual Biosca, Daniel; Onrubia Ibáñez, Raúl; Hyuk, Park; Camps Carmona, Adriano José; Rudiger, Christoph; Walker, Jeffrey; Monerris Belda, Alessandra (Institute of Electrical and Electronics Engineers (IEEE), 2021-11-29)
    Article
    Accés obert
    Vegetation canopy height (CH) is one of the important remote-sensing parameters related to forests’ structure, and it can be related to the biomass and the carbon stock. Global navigation satellite system-reflectometry ...
  • Error propagation in microwave soil moisture and vegetation optical depth retrievals 

    Feldman, Andrew F.; Chaparro Danon, David; Entekhabi, Dara (2021-01-01)
    Article
    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. ...
  • Validation of SMOS L3 and L4 soil moisture products in the REMEDHUS (Spain) and CEMADEN (brazil) networks 

    Rossato, Luciana; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Chaparro Danon, David; Alvalá, Regina Célia dos Santos; Barbosa Alves, Humberto (2020-01-01)
    Article
    Accés obert
    This work analyzes the quality of the soil moisture L3 (25 km) and L4 (1 km) products generated at the Barcelona Expert Center (BEC) in two sites located in distinct semi-arid regions, where measurement networks are ...
  • L-band vegetation optical depth estimation using transmitted GNSS signals: Application to GNSS-reflectometry and positioning 

    Camps Carmona, Adriano José; Alonso Arroyo, Alberto; Hyuk, Park; Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Querol Borràs, Jorge (Multidisciplinary Digital Publishing Institute (MDPI), 2020-08-01)
    Article
    Accés obert
    At L-band (1–2 GHz), and particularly in microwave radiometry (1.413 GHz), vegetation has been traditionally modeled with the τ-ω model. This model has also been used to compensate for vegetation effects in Global Navigation ...
  • On the correlation between GNSS-R reflectivity and L-band microwave radiometry 

    Alonso Arroyo, Alberto; Camps Carmona, Adriano José; Monerris Belda, Sandra; Rudiger, Christoph; Walker, Jeffrey; Onrubia Ibáñez, Raúl; Querol Borràs, Jorge; Hyuk, Park; Pascual Biosca, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2016-12)
    Article
    Accés obert
    This work compares microwave radiometry and global navigation satellite systems-reflectometry (GNSS-R) observations using data gathered from airborne flights conducted for three different soil moisture conditions. Two ...
  • Advanced GNSS-R signals processing with GPUs 

    Cervelló Nogués, Oriol; Pascual Biosca, Daniel; Onrubia Ibáñez, Raúl; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2020-01-01)
    Article
    Accés obert
    Global navigation satellite system reflectometry (GNSS-R) is a group of techniques that uses satellite navigation signals as signals of opportunity for remote sensing applications. In GNSS-R, large amounts of data are ...
  • Untangling the incoherent and coherent scattering components in GNSS-R and novel applications 

    Muñoz Martin, Joan Francesc; Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Hyuk, Park; Camps Carmona, Adriano José; Rudiger, Christoph; Walker, Jeffrey; Monerris Belda, Alessandra (Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-09)
    Article
    Accés obert
    As opposed to monostatic radars where incoherent backscattering dominates, in bistatic radars, such as Global Navigation Satellite Systems Reflectometry (GNSS-R), the forward scattered signals exhibit both an incoherent ...
  • Experimental evidence of swell signatures in airborne L5/E5a GNSS-reflectometry 

    Muñoz Martin, Joan Francesc; Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Hyuk, Park; Camps Carmona, Adriano José; Rudiger, Christoph; Walker, Jeffrey; Monerris Belda, Alessandra (Multidisciplinary Digital Publishing Institute (MDPI), 2020-05-29)
    Article
    Accés obert
    As compared to GPS L1C/A signals, L5/E5a Global Navigation Satellite System-Reflectometry (GNSS-R) improves the spatial resolution due to the narrower auto-correlation function. Furthermore, the larger transmitted power ...
  • Detecting Targets above the Earth's Surface Using GNSS-R Delay Doppler Maps: Results from TDS-1 

    Hu, Changjiang; Benson, Craig; Hyuk, Park; Camps Carmona, Adriano José; Qiao, Li; Rizos, Chris (Multidisciplinary Digital Publishing Institute (MDPI), 2019-10-07)
    Article
    Accés obert
    : Global Navigation Satellite System (GNSS) reflected signals can be used to remotely sense the Earth’s surface, known as GNSS reflectometry (GNSS-R). The GNSS-R technique has been applied to numerous areas, such as the ...
  • Satellite cross-talk impact analysis in airborne interferometric global navigation satellite system-reflectometry with the microwave interferometric reflectometer 

    Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Hyuk, Park; Camps Carmona, Adriano José; Rudiger, Christoph; Walker, Jeffrey; Monerris Belda, Alessandra (Multidisciplinary Digital Publishing Institute (MDPI), 2019-05-01)
    Article
    Accés obert
    This work analyzes the satellite cross-talk observed by the microwave interferometric reflectometer (MIR), a new global navigation satellite system (GNSS) reflectometer, during an airborne field campaign in Victoria and ...
  • The global navigation satellite systems reflectometry (GNSS-R) microwave interferometric reflectometer: hardware, calibration, and validation experiments 

    Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Querol Borràs, Jorge; Hyuk, Park; Camps Carmona, Adriano José (Multidisciplinary Digital Publishing Institute (MDPI), 2019-02-27)
    Article
    Accés obert
    This manuscript describes the Microwave Interferometric Reflectometer (MIR) instrument, a multi-beam dual-band GNSS-Reflectometer with beam-steering capabilities built to assess the performance of a PAssive Reflectrometry ...

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