Browsing by Author "Hyuk, Park"Més informacióMés informació

Now showing items 21-40 of 179

    • An imaging algorithm for synthetic aperture interferometric radiometers with built-in RFI mitigation 

      Camps Carmona, Adriano José; Hyuk, Park; González Gambau, Veronica (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      Radio Frequency Interference (RFI) is probably one of the most important limiting factors in the accuracy of the brightness temperatures measured by microwave radiometers. Due to the proximity of the 'protected' L-band ...

    • Analysis of GNSS-R delay and doppler tracking errors 

      Hyuk, Park; Camps Carmona, Adriano José; Valencia Domènech, Enric; Carreño Luengo, Hugo; Martín Alemany, Francisco; Alonso Arroyo, Alberto; Pascual Biosca, Daniel (2012)
      Conference report
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      The compensation of the delay and Doppler errors using tracking is important to accurately estimate the sea height in spaceborne GNSS-R. This work presents the impacts of the tracking residual errors on the GNSS-R observables, ...

    • Analysis of spaceborne GNSS-R delay-doppler tracking 

      Hyuk, Park; Pascual Biosca, Daniel; Camps Carmona, Adriano José; Martínez Mindeguía, Francisco; Alonso Arroyo, Alberto; Carreño Luengo, Hugo (2014-05-01)
      Article
      Restricted access - publisher's policy
      For spaceborne Global Navigation Satellite System-Reflectometry (GNSS-R), the delay and Doppler frequency conditions dynamically change, so the compensation of the delay and Doppler errors using tracking is important to ...

    • Analysis of the potential of small satellites to cover the sea ice data products gap 

      Lancheros Sepulveda, Estefany Maria; Hyuk, Park; Camps Carmona, Adriano José; Di Simone, Alessio; Matevosyan, H.; Lluch, I. (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
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      This work reviews and analyses potentially relevant technologies to ensure that the gaps and stakeholder needs for sea ice products are covered. Each variable related to sea ice that presenting gaps using the European EO ...

    • Analyzing Anomalous Artefacts in TDS-1 Delay Doppler Maps 

      Hu, Changjiang; Benson, Craig; Hyuk, Park; Camps Carmona, Adriano José; Li, Qiao; Rizos, Chris (2019)
      Conference report
      Open Access
      Global Navigation Satellite System Reflectometry (GNSS-R) uses the GNSS reflected signals to study parameters of the Earth's surface such as ocean surface height, wind speed, soil moisture, sea surface target detection. ...

    • Analyzing GNSS-RO derived ionospheric intensity scintillation preceding earthquakes in the Coral Sea during 2022 

      Carvajal Librado, Mireia; Molina Ordóñez, Carlos; Boudriki Semlali, Badr Eddine; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2024-09-02)
      Article
      Open Access
      Lithosphere–atmosphere–ionosphere coupling models have been widely studied as potential earthquake precursors. After the earthquakes, total electron content (TEC) anomalies propagating away from the epicenter have been ...

    • Antena Bi-banda con conformación de dos haces simultáneos para sistemas GNSS-R 

      Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Querol Borràs, Jorge; Hyuk, Park; Camps Carmona, Adriano José (Unión Científica Internacional de Radio (URSI), 2018)
      Conference report
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      Global Navigation Satellite Systems – Reflectometry (GNSS-R) is a relatively new remote sensing technique that benefits from GNSS signals as signals of opportunity as a bistatic radar. These signals can be processed as ...

    • Assessment of DME/TACAN RFI mitigation techniques in GNSS-R 

      Onrubia Ibáñez, Raúl; Querol Borràs, Jorge; Pascual Biosca, Daniel; Hyuk, Park; Alonso Arroyo, Alberto; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      Global Navigation Satellite Systems Reflectometry (GNSSR) is now being recognized as a powerfull tool for remote sensing. With the addition of new frequency bands and codes, it is possible to increase the resolution and ...

    • Assessment of satellite contacts using predictive algorithms for autonomous satellite networks 

      Ruiz De Azúa Ortega, Juan Adrián; Ramírez, Victoria; Hyuk, Park; Calveras Augé, Anna M.; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2020-05-28)
      Article
      Open Access
      Upcoming Low Earth Orbit Satellite Networks will provide low-latency and high downlink capacity necessary for future broadband communications and Earth Observation missions. This architecture was proposed at the beginning ...

    • Association of land surface temperature anomalies from GOES/ABI, MSG/SEVIRI, and Himawari-8/AHI with land earthquakes between 2010 and 2021 

      Boudriki Semlali, Badr Eddine; Molina Ordóñez, Carlos; Hyuk, Park; Camps Carmona, Adriano José (Taylor & Francis Group, 2024-04-09)
      Article
      Open Access
      Every year, earthquakes cause numerous casualties and billions of dollars in economic damages, and so far, it is impossible to pre-dict them. Many researchers have studied the land surface tem-perature (LST) anomalies ...

    • Beamformer characterization of the MIR instrument: the microwave interferometric reflectometer 

      Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Querol Borràs, Jorge; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference lecture
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      Global Navigation Satellite Systems - Reflectometry (GNSS-R) has opened promising results for remote sensing applications. The broadcast of new signals with wider bandwidth provides an opportunity to increase the performance ...

    • BIBLOS for simulation of the Earth observation missions 

      Kedzierawski, Robert; Oryszczak, Wojciech; Szczepankiewicz, Karolina; Camps Carmona, Adriano José; Hyuk, Park; Barrios García, Pedro A. (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2019)
      Conference report
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      End-to-End Mission Performance Simulators for Earth Observation missions are one of the prominent tools for system design and scientific validation in early mission phases. The European Space Agency has promoted efforts ...

    • Biblos: building blocks for earth observation mission performance simulators 

      Soto, Lucía; Szczepankiewicz, Karolina; Kedzierawski, Robert; Negueruela Ruiz, Cristina de; Camps Carmona, Adriano José; Hyuk, Park; Metselaar, H.; Franco, Raffaella (European Space Agency (ESA), 2017)
      Conference report
      Open Access
      End-to-end mission performance simulators for Earth Observation missions are one of the prominent tools for system design and scientific validation in early mission phases. The European Space Agency (ESA)has promoted efforts ...

    • Calibration of GNSS-R receivers with PRN signal injection: methodology and validation with the microwave interferometric reflectometer (MIR) 

      Pascual Biosca, Daniel; Onrubia Ibáñez, Raúl; Querol Borràs, Jorge; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      The demonstration of the feasibility of navigation signals signals for remote sensing has lead to a significant increase of new GNSS-R instruments in the recent years. Despite of the type instrument, the observables are ...

    • Calibration, performance, and imaging tests of a fully digital synthetic aperture interferometer radiometer 

      Ramos Pérez, Isaac; Forte Veliz, Giuseppe Francesco; Camps Carmona, Adriano José; Bosch Lluís, Xavier; Valencia Domènech, Enric; Rodríguez Álvarez, Nereida; Hyuk, Park; Vall-Llossera Ferran, Mercedes Magdalena (2012-06-28)
      Article
      Restricted access - publisher's policy
      This work presents the calibration, characterization, and imaging tests of the Passive Advanced Unit-Synthetic Aperture instrument (PAU-SA). PAU-SA is a fully digital -shaped two-dimensional synthetic aperture interferometric ...

    • 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)
      Conference report
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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 ...

    • Common mathematical framework for real and synthetic aperture by interferometry radiometers 

      Bosch Lluís, Xavier; Ramos Pérez, Isaac; Camps Carmona, Adriano José; Rodríguez Álvarez, Nereida; Valencia Domènech, Enric; Hyuk, Park (Institute of Electrical and Electronics Engineers (IEEE), 2014-01)
      Article
      Restricted access - publisher's policy
      This work focuses on the relationship between real and synthetic aperture radiometers giving a general and common mathematical framework for both of them. It will be demonstrated that a real aperture radiometer array ...

    • Comparison of GNSS-R processing techniques for spaceborne ocean altimetry 

      Martín Alemany, Francisco; d'Addio, Salvatore; Camps Carmona, Adriano José; Martín Neira, Manuel; Hyuk, Park; Pascual Biosca, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      Earth-reflected Global Navigation Satellite System (GNSS) have become an attractive tool to be employed in low-Earth-orbit spaceborne missions, for applications such as ocean mesoscale altimetry and scatterometry. For such ...

    • Comparison of GPS L1 and Galileo E1 signals for GNSS-R ocean altimetry 

      Pascual Biosca, Daniel; Hyuk, Park; Camps Carmona, Adriano José; Alonso Arroyo, Alberto; Onrubia Ibáñez, Raúl (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      In the last years, the GPS signals have been validated as opportunity signals in a wide range of reflectometry-based remote sensing applications for sea, land or ice scenarios. Recently, the first Galileo satellites have ...

    • Comparison of real-time time-frequency RFI mitigation techniques in microwave radiometry 

      Querol Borràs, Jorge; Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Alonso Arroyo, Alberto; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      Radio-Frequency Interference (RFI) is a well-known problem for Microwave Radiometers (MWR). A number of RFI mitigation techniques have been studied to deal with RFI from the receiver's side. In this study, a comparison in ...