Ara es mostren els items 1-20 de 82

  • AATR an ionospheric activity indicator specifically based on GNSS measurements 

    Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Rovira Garcia, Adrià; González Casado, Guillermo; Ibáñez Segura, Deimos; Orús Pérez, Raul (2018-03-01)
    Article
    Accés obert
    This work reviews an ionospheric activity indicator useful for identifying disturbed periods affecting the performance of Global Navigation Satellite System (GNSS). This index is based in the Along Arc TEC Rate (AATR) and ...
  • Accuracy of ionospheric models used in GNSS and SBAS: methodology and analysis 

    Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Ibáñez Segura, Deimos (2016-03-01)
    Article
    Accés restringit per acord de confidencialitat
    © 2015, Springer-Verlag Berlin Heidelberg. The characterization of the accuracy of ionospheric models currently used in global navigation satellite systems (GNSSs) is a long-standing issue. The characterization remains a ...
  • A method for scintillation characterization using geodetic receivers operating at 1 Hz 

    Juan Zornoza, José Miguel; Aragón Ángel, Maria Angeles; Sanz Subirana, Jaume; González Casado, Guillermo; Rovira Garcia, Adrià (2017-05-08)
    Article
    Accés restringit per política de l'editorial
    Ionospheric scintillation produces strong disruptive effects on global navigation satellite system (GNSS) signals, ranging from degrading performances to rendering these signals useless for accurate navigation. The current ...
  • 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)
    Comunicació de congrés
    Accés restringit per política de l'editorial
  • A real-time world-wide ionospheric model for single and multi-frequency precise navigation 

    Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (The Institute of Navigation, 2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The ionosphere plays an important role in satellite-based navigation, either in standard navigation, with single frequency mass-market receivers, or in precise navigation, with dual frequency receivers. In this work, the ...
  • 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
    Accés obert
    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 ...
  • Basic Research Utilities for SBAS (BRUS) 

    Prats Menéndez, Xavier; Orús Pérez, Raül; Sanz Subirana, Jaume; Farnworth, Richard; Soley, Santiago (2003-02)
    Text en actes de congrés
    Accés obert
    The software package BRUS (Basic Research utilities for SBAS) to process WAAS and EGNOS data is being developed by gAGE/UPC. Some of the main characteristics of BRUS are its architecture design and functionalities that ...
  • Building links between Europe and South-East Asia in the field of EGNSS: the BELS project and the Navis 

    Povero, Gabriella; Deisting, Baerbel; Kling, Sabine; Hai Tung, Ta; Vinh, La The; Belforte, Gustavo; Sanz Subirana, Jaume; Rizos, Chris; Marradi, Livio (2015)
    Text en actes de congrés
    Accés obert
    South East Asia is growing at an impressive pace with its GDP having increased by about 350% in ten years , ri sing from 650 Billion $ in 2002 to about 2300 Billion $ in 2012. Regional governments actively promote ...
  • Characterization and modelling of the ionosphere for EGNOS development and qualification 

    Schlüter, S.; Prieto Cerdeira, Roberto; Orús Pérez, Raul; Lam, J.P.; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Hernández Pajares, Manuel (2013)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The availability of representative data samples, models and statistical information derived from the analysis of parameters that adequately describe the state of the ionosphere are key elements for the design, verification ...
  • Consolidated characterisation of an ionospheric indicator for the definition of EGNOS Ionospheric Conditions 

    Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2014-04-29)
    Report de recerca
    Accés restringit per acord de confidencialitat
  • Definition of an SBAS ionospheric activity indicator and its assessment over Europe and Africa During the last solar cycle 

    Sanz Subirana, Jaume; Juan Zornoza, José Miguel; Hernández Pajares, Manuel; Prieto Cerdeira, Roberto; Schlueter, Stefan (2013)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    In this work, an ionospheric activity indicator is defined based in the “weighted” Along Arc TEC rate (AATR). It is shown that this indicator, which can be easily computed from the GPS carrier phases, is well correlated ...
  • Description of the experiment set-up in Vietnam 

    Quang, Phuong Xuan; Vinh, La The; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; García Rigo, Alberto; Hai Tung, Ta (2013-07-03)
    Report de recerca
    Accés restringit per decisió de l'autor
  • Direct determination of electron density profiles from GNSS occulttion data 

    Aragón Ángel, María Ángeles; Hernández Pajares, Manuel; Miguel Juan, Miguel; Sanz Subirana, Jaume; Ramos Bosch, Pedro (2008-08-07)
    Comunicació de congrés
    Accés obert
  • Enhanced precise point positioning for GNSS users 

    Juan Zornoza, José Miguel; Hernández Pajares, Manuel; Sanz Subirana, Jaume; Ramos Bosch, Pedro; Aragón Ángel, María Ángeles; Orus, R.; Ochieng, W.; Feng, S; Jofre, Martí; Coutinho, P; Samson, Jaron; Tossaint, Michel Mathias Maria (Institute of Electrical and Electronics Engineers (IEEE), 2012-09-21)
    Article
    Accés restringit per política de l'editorial
    This paper summarizes the main results obtained during the development of an Enhanced Precise Point Positioning (EPPP) Global Navigation Satellite Systems multifrequency user algorithm. The main innovations include the ...
  • ESTB performance against lossing satellites (first results) 

    Sanz Subirana, Jaume; Prats Menéndez, Xavier; Farnworth, Richard; Soley, Santiago (2003-02)
    Text en actes de congrés
    Accés obert
    The EGNOS System Test Bed (ESTB) is the EGNOS prototype which has been broadcasting a Signal in Space since February 2000. Accuracy, integrity, continuity and availability are the main concepts in this European component ...
  • EVA: GPS-based extended velocity and acceleration determination 

    Salazar Hernández, Dagoberto José; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Aragón Ángel, María Ángeles (2010-12-01)
    Article
    Accés restringit per política de l'editorial
    In this work, a new GPS carrier phase-based velocity and acceleration determination method is presented that extends the effective range of previous techniques. The method is named ‘EVA’, and may find applications in ...
  • Fast-PPP assessment in European and equatorial region near the solar cycle maximum 

    Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2014)
    Comunicació de congrés
    Accés obert
  • Fast precise point positioning: a system to provide corrections for single and multi-frequency navigation 

    Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Bertran Albertí, Eduardo (2016-09)
    Article
    Accés obert
    Fast Precise Point Positioning (Fast-PPP) provides Global Navigation Satellite System corrections in real-time. Satellite orbits and clock corrections are shown to be accurate to a few centimeters and a few tenths of a ...
  • Fast Precise Point Positioning based on real-time ionospheric modelling 

    Juan Zornoza, José Miguel; Hernández Pajares, Manuel; Sanz Subirana, Jaume; Samson, Jaron; Tossaint, Michel Mathias Maria (2012)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Summary of main results of new technique Fast Precise Point Positioning developed in the framework of the “Enhanced Precise Point Positioning (EPPP) GNSS multifrequency user algorithm” ESA funded project. -The precise ...
  • Fast Precise Point Positioning for decimeter-error-level navigation for multi and single-frequency users of Global Navigation Satellite Systems 

    Juan Zornoza, José Miguel; Hernández Pajares, Manuel; Sanz Subirana, Jaume; Samson, J.; Tossaint, M. (2012)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    This manuscript summarizes the new algorithm of Fast Precise Point Positioning (FPPP) the developed during the projects "Enhanced PPP GNSS multifrequency user algorithm" nd “Precise Real Time Orbit Determination and Time ...