Ara es mostren els items 16-35 de 118

    • Automated GPS Signal-in-Space anomalies monitoring over more than 11 years 

      Sanz Subirana, Jaume; Juan Zornoza, José Miguel; López de Echazarreta, Carlos; González Casado, Guillermo; Rovira Garcia, Adrià; Alonso Alonso, María Teresa; Ibáñez Segura, Deimos (ION Publications (The Institute of navigation), 2019)
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    • 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 ...
    • Climatology of High and Low Latitude Scintillation in the Last Solar Cycle by Means of the Geodetic Detrending Technique 

      Rovira Garcia, Adrià; González Casado, Guillermo; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Orús Pérez, Raul (ION Publications (The Institute of navigation), 2020)
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      Signals from a Global Navigation Satellite System (GNSS) can be disturbed along the propagation ray path from the satellites to the receivers. The presence of irregularities in the electron density in the near-Earth space ...
    • Confirming geomagnetic Sfe by means of a solar flare detector based on GNSS 

      Curto Subirats, Juan Jose; Juan Zornoza, José Miguel; Timote Bejarano, Cristhian Camilo (2019-11-28)
      Article
      Accés obert
      Solar Flares (SF) refer to sudden increases of electromagnetic radiation from the Sun lasting from minutes to hours. Irradiance in the Extremely Ultra-Violet (EUV) or X band is enhanced and it can produce a sudden ...
    • 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
    • D.01. GPS-DF FE characterisation report 

      Sanz Subirana, Jaume; Juan Zornoza, José Miguel; Alonso Alonso, María Teresa (2018-01-14)
      Report de recerca
      Accés restringit per acord de confidencialitat
    • Data gathering and methodology 

      Sanz Subirana, Jaume; Juan Zornoza, José Miguel (2018-10-31)
      Report de recerca
      Accés obert
      The aim of this WP5 is to specify the impact of TID in EGNOS, N-RTK and HF systems through statistical correlation of the performance data recorded from system operators and of TID detection results. The analysis will be ...
    • 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
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    • EGNOS 1046 maritime service assessment 

      Ibáñez Segura, Deimos; Rovira Garcia, Adrià; Alonso Alonso, María Teresa; Sanz Subirana, Jaume; Juan Zornoza, José Miguel; González Casado, Guillermo; López Martínez, Manuel (Multidisciplinary Digital Publishing Institute (MDPI), 2020-01-01)
      Article
      Accés obert
      The present contribution evaluates how the European Geostationary Navigation Overlay System (EGNOS) meets the International Maritime Organization (IMO) requirements established in its Resolution A.1046 for navigation in ...
    • Enhanced neural network model for regional ionospheric modeling and evaluation under different solar-geomagnetic conditions 

      Dong, Yanfeng; Gao, Chengfa; Long, Fengyang; Nie, Wenfeng; Juan Zornoza, José Miguel; Rovira Garcia, Adrià; Zhang, Ruicheng (2023-03-01)
      Article
      Accés obert
      Monitoring spatiotemporal variations of ionospheric vertical total electron content (VTEC) is crucial for space weather and satellite positioning. In the present study, an enhanced neural network (ENN) model is proposed ...
    • 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 ...
    • 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 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
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      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 ...
    • 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-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
    • Feasibility analysis of a methodology to estimate hourly DCBs for Feared Events Characterization 

      Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2014-05-19)
      Report de recerca
      Accés restringit per acord de confidencialitat
      Analysis of Hardware Biases Feared Events
    • Feasibility of precise navigation in high and low latitude regions under scintillation conditions 

      Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Rovira Garcia, Adrià; Camps Carmona, Adriano José; Riba Sagarra, Jaume; Barbosa, José; Blanch Llosa, Estefania; Altadill, David; Orús Pérez, Raul (2018-02-06)
      Article
      Accés obert
      Scintillation is one of the most challenging problems in Global Navigation Satellite Systems (GNSS) navigation. This phenomenon appears when the radio signal passes through ionospheric irregularities. These irregularities ...
    • FES-WARTK final presentation 

      Toledo, M; Fernández-Hernández, I.; Verhagen, S; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Aragón Ángel, María Ángeles; Ramos Bosch, Pedro; Odijk, D; De Bakker, Peter; Van der Marel, Hans (-, 2008)
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