Now showing items 1-20 of 46

    • 3CAT-3/MOTS, an experimental nanosatellite for multispectral and GNSS-R earth observation: airborne optical and GNSS-R campaign 

      Castellví Esturi, Jordi; Camps Carmona, Adriano José; Onrubia Ibáñez, Raúl; Alamús, Ramón; Pascual Biosca, Daniel; Querol Borràs, Jorge; Hyuk, Park (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      The 3 Cat-3/MOTS mission is a joint initiative between the Institut Cartogràfic i Geològic de Catalunya (ICGC) and the Universitat Politècnica de Catalunya-BarcelonaTech (UPC) to foster new and innovative technologies on ...
    • A generic level 1 simulator for spaceborne GNSS-R missions and application to GEROS-ISS ocean reflectometry 

      Hyuk, Park; Camps Carmona, Adriano José; Pascual Biosca, Daniel; Kang, Yujin; Onrubia Ibáñez, Raúl; Querol Borràs, Jorge; Alonso Arroyo, Alberto (2017-07-18)
      Article
      Open Access
      In the past decade Global Navigation Satellites System Reflectometry (GNSS-R) has emerged as a new technique for earth remote sensing for various applications, such as ocean altimetry and sea state monitoring. After the ...
    • A radio-frequency interference detector for GNSS navigation and GNSS-reflectometry applications 

      Querol Borràs, Jorge; Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      Radio-Frequency Interference (RFI) is a growing problem for applications based on the Global Navigation Satellite Systems (GNSS), including Earth observation using GNSS - Reflectometry (GNSS-R). Nowadays, many efforts are ...
    • A remote carrier synchronization technique for coherent distributed remote sensing systems 

      Merlano-Duncan, Juan Carlos; Martínez Marrero, Liz; Querol Borràs, Jorge; Kumar, Sumit; Camps Carmona, Adriano José; Chatzinotas, Symeon; Ottersten, Bjorn (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Article
      Open Access
      Phase, frequency, and time synchronization are crucial requirements for many applications, such as multistatic remote sensing and communication systems. Moreover, the synchronization solution becomes even more challenging ...
    • A stratospheric balloon GNSS-R experiment: The 3Cat-2 project in DLR/SNSB BEXUS 

      Carreño Luengo, Hugo; Camps Carmona, Adriano José; Querol Borràs, Jorge; Forte Veliz, Giuseppe Francesco; Onrubia Ibáñez, Raúl; Díez, Raúl (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference lecture
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      Universitat Politècnica de Catalunya (UPC) - BarcelonaTech Remote Sensing Laboratory focus on the development of breakthrough concepts. The 3Cat-2 mission is on the synergy of GNSS reflectometry and the CubeSat concept. ...
    • Advances in the MIR instrument: integration, control subsystem and analysis of the flight dynamics for beamsteering purposes 

      Onrubia Ibáñez, Raúl; Garrucho, Lidia; Pascual Biosca, Daniel; Hyuk, Park; Querol Borràs, Jorge; Alonso Arroyo, Alberto; Camps Carmona, Adriano José (2015)
      Conference lecture
      Restricted access - publisher's policy
      The MIR (Microwave Interferometric Reflectometer) is a new dual frequency Global Navigation Satellite Systems Re- flectometry (GNSS-R) instrument that implements conventional and interferometric reflectometry, both with ...
    • An anti-jamming system for GNSS timing applications 

      Querol Borràs, Jorge; Camps Carmona, Adriano José; Manfredini, E.G.; Píriz, R. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
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      Radio-Frequency Interference (RFI) and jamming are increasing problems for timing applications based on Global Navigation Satellite Systems (GNSS). FENIX-lite is a real-time pre-correlation anti-jamming system designed to ...
    • 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
      Restricted access - publisher's policy
      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 back-end RFI mitigation techniques in passive remote sensing 

      Querol Borràs, Jorge; Alonso Arroyo, Alberto; Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Camps Carmona, Adriano José (2015)
      Conference lecture
      Restricted access - publisher's policy
      Radio-Frequency Interference (RFI) is a growing problem specially for those systems that work with low power signals such as passive remote sensing instruments. Consequently, RFI mitigation techniques are currently under ...
    • 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 ...
    • 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
      Restricted access - publisher's policy
      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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • Cross-talk statistics and impact in interferometric GNSS-R 

      Pascual Biosca, Daniel; Hyuk, Park; Onrubia Ibáñez, Raúl; Alonso Arroyo, Alberto; Querol Borràs, Jorge; Camps Carmona, Adriano José (2016-06-23)
      Article
      Open Access
      This paper presents a statistical analysis of the crosstalk phenomenon in interferometric Global Navigation Satellite Systems Reflectometry (iGNSS-R). Crosstalk occurs when the Delay-Doppler Map (DDM) of a tracked satellite ...
    • Determination of sea correlation time at L-Band with airborne reflected new GNSS signals 

      Pascual Biosca, Daniel; Onrubia Ibáñez, Raúl; Querol Borràs, Jorge; Castellví Esturi, Jordi; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
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      The maximum coherent integration time of GNSS reflected (GNSS-R) signals over sea depends on the sea state, as well as on the geometry formed by the receiver, the GNSS satellite and the reflection point. In this paper, ...
    • Digital back-end for RFI detection and mitigation in earth observation 

      Forte Veliz, Giuseppe Francesco; Querol Borràs, Jorge; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      A powerful real time Radio-frequency interference (RFI) mitigation back-end system is presented in this work. The interfering signals are estimated by using the wavelet transform to utilize its effective denoising capability. ...
    • Disseny i implementació d’un servidor de pàgines web per a la supervisió i difusió de mesures a temps real d’una instal•lació fotovoltaica específica per a la mesura en mòduls fotovoltaics 

      Querol Borràs, Jorge (Universitat Politècnica de Catalunya, 2011-10-05)
      Master thesis (pre-Bologna period)
      Open Access
      English: The goal of this project is the monitoring of a PV system by designing a specific acquisition card. Measurements are recorded on a SD memory and transferred to a web server which shows them in a web page. The ...
    • DME/TACAN impact analysis on GNSS reflectometry 

      Onrubia Ibáñez, Raúl; Querol Borràs, Jorge; Pascual Biosca, Daniel; Alonso Arroyo, Alberto; Hyuk, Park; Camps Carmona, Adriano José (2016-05-31)
      Article
      Open Access
      Global navigation satellite system reflectometry (GNSS-R) is becoming a widely accepted technique for remote sensing. The interferometric technique (iGNSS-R) correlates the direct signal received from a satellite and the ...
    • First Delay Doppler Maps obtained with the Microwave Inteferometric Reflectometer (MIR) 

      Pascual, Daniel; Onrubia Ibáñez, Raúl; Querol Borràs, Jorge; Alonso Arroyo, Alberto; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      This work presents the first Delay Doppler Maps (DDMs) obtained with the Microwave Interferometric Reflectometer (MIR) airborne instrument. MIR is a GNSS Reflectometer (GNSS-R) which uses the conventional (cGNSS-R) and ...