Now showing items 1-20 of 74

  • 3CAT-2: a 6U CibeSat-based multi-constellation, dual-polarization, and dual-frequency GNSS-RO experimental mission 

    Carreño Luengo, Hugo; Amézaga Sarries, Adrià; Bolet, Albert; Vidal Mateu, David; Jané, Jaume; Muñoz Martin, Joan Francesc; Olivé Muñiz, Roger; Camps Carmona, Adriano José; Carola, Jorge; Catarino, Nuno; Hagenfeldt, Miguel; Palomo, Pedro; Cornara, Stefania (2015)
    Conference report
    Restricted access - publisher's policy
    Cat-2 Assembly, Integration and Verification (AIV) activities of the Engineering Model (EM) and the Flight Model (FM) are being carried out at present. The Attitude Determination and Control System (ADCS) and Flight ...
  • 3CAT-2, an experimental nano-satellite for GNSS-R earth observation: mission concept and analysis 

    Carreno-Luengo, Hugo; Camps Carmona, Adriano José; Muñoz, Joan Francesc; Vidal, David; Amézaga Sarries, Adrià; Bolet Alberto, Font; Jané, Jaume; Olivé, Roger; Carola, Jorge; Catarino, Nuno; Hagenfeldt, Miguel; Palomo, Pedro; Cornara, Stefania (2016-10-01)
    Article
    Open Access
    Global navigation satellite system reflectometry is a multistatic radar using navigation signals as signals of opportunity. It provides wide-swath and improved spatiotemporal sampling over current space-borne missions. The ...
  • 3Cat-3/MOTS nanosatellite mission for optical multispectral and GNSS-R Earth Observation: concept and analysis 

    Castellví Esturi, Jordi; Camps Carmona, Adriano José; Corbera Fauria, Jordi; Alamús, Ramón (Multidisciplinary Digital Publishing Institute (MDPI), 2018-01-06)
    Article
    Open Access
    The 3Cat-3/MOTS (3: Cube, Cat: Catalunya, 3: 3rd CubeSat mission/Missió Observació Terra Satèl·lit) mission is a joint initiative between the Institut Cartogràfic i Geològic de Catalunya (ICGC) and the Universitat Politècnica ...
  • 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 ...
  • 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 methodology to assess ionospheric models for GNSS 

    Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Ibáñez Segura, Deimos (2015)
    Conference lecture
    Restricted access - publisher's policy
  • 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)
    Conference lecture
    Restricted access - publisher's policy
    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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • A Worldwide ionospheric model for fast precise point positioning 

    Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo (Institute of Electrical and Electronics Engineers (IEEE), 2015-03-03)
    Article
    Open Access
    Fast precise point positioning (Fast-PPP) is a satellite-based navigation technique using an accurate real-time ionospheric modeling to achieve high accuracy quickly. In this paper, an end-to-end performance assessment of ...
  • 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
    Restricted access - publisher's policy
    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 ...
  • Characterization of the orbit error in the new C/NAV messages from modernized GPS satellites (IIR-M and IIF blocks) 

    Salvatierra Catacora, Johana (Universitat Politècnica de Catalunya, 2017-09-26)
    Master thesis
    Restricted access - confidentiality agreement
  • 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 ...
  • Consistency of seven different GNSS global ionospheric mapping techniques during one solar cycle 

    Roma Dollase, David; Hernández Pajares, Manuel; Krankowski, Andrzej; Kotulak, Kacper; Ghoddousi Fard, Reza; Yuan, Yunbin; Li, Zishen; Zhang, Hongping; Shi, Chuang; Wang, Cheng; Feltens, Joachim; Vergados, Panagiotis; Komjathy, Attila; Schaer, Stefan C.; García Rigo, Alberto; Gómez Cama, José Mª (2017-11-28)
    Article
    Open Access
    In the context of the International GNSS Service (IGS), several IGS Ionosphere Associated Analysis Centers have developed different techniques to provide global ionospheric maps (GIMs) of vertical total electron content ...
  • Contribución al diseño de GNSS-SDR, un receptor GNSS de código abierto 

    Esteve Elfau, Luis (Universitat Politècnica de Catalunya, 2013-07-11)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] This project introduces GNSS-SDR, an open source Global Navigation Satellite System software-defined receiver. The lack of reconfigurability of current commercial-of-the-shelf receivers and the advent of new ...