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Ara es mostren els items 21-36 de 36

    • Modelizando el cálculo de varias variablEEES en el aula 

      Aragón Ángel, María Ángeles; Cubarsí Morera, Rafael (2010-06)
      Comunicació de congrés
      Accés obert
      La implantación de la modelización matemática en el ámbito del Espacio Europeo de Educación Superior (EEES) necesita de una revisión y adaptación de los contenidos y estrategias para abordar las asignaturas, en particular, ...

    • Neural network based model for global Total Electron Content forecasting 

      Cesaroni, Claudio; Spogli, Luca; Aragón Ángel, María Ángeles; Fiocca, Michel; Dear, Varuliator; De Franceschi, Giorgiana; Romano, Vincenzo (EDP Sciences, 2020-03)
      Article
      Accés obert
      We introduce a novel empirical model to forecast, 24 h in advance, the Total Electron Content (TEC) at global scale. The technique leverages on the Global Ionospheric Map (GIM), provided by the International GNSS Service ...

    • Plasmaspheric Electron Content contribution inferred from ground and radio occultation derived Total Electron Content 

      Aragón Ángel, María Ángeles; Sanz Subirana, Jaume; Juan Zornoza, José Miguel; Hernández Pajares, Manuel; Altadill, D. (2012)
      Text en actes de congrés
      Accés obert
      The FORMOSAT-3/COSMIC satellite constellation has become an important source of remote sensing data globally distributed for the sounding of the atmosphere of the Earth and, in particular, the ionosphere. In this study, ...

    • Preliminary NeQuick assessment for future single frequency users of GALILEO 

      Aragón Ángel, María Ángeles; Orús Pérez, Raül; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2005)
      Text en actes de congrés
      Accés obert
      The NeQuick model is the ionospheric mo del that will be used by the GALILEO single frequency user to compute ionospheric corrections. In this framework, the aim of this study is to show a preliminary assessment of the ...

    • Real time application of Tomion model 

      Orús Pérez, Raül; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Aragón Ángel, María Ángeles; García Rigo, Alberto (2010)
      Comunicació de congrés
      Accés obert
      Since the first development of the TOMION(TOmographic Model of the IONosphere),in1995,gAGE/UPC has been improving the performance and reliability of this technique. The TOMION kernel relies on the computation of the ...

    • Software prototype for the Galileo ionospheric correction model: progress report 

      Aragón Ángel, María Ángeles; Zürn, M. (2016-11-15)
      Report de recerca
      Accés obert
      The document describing the particular ionospheric model developed for the Galileo satellite navigation system has been officially released [1]. Its publication allows GNSS receiver manufacturers to start the implementation ...

    • Solar EUV flux rate estimation during mid and strong flares from the ionospheric electron content response signature in GNSS observations 

      Hernández Pajares, Manuel; García Rigo, Alberto; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Monte Moreno, Enrique; Aragón Ángel, María Ángeles (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A simple and precise technique to measure the sudden Extreme Ultraviolet (EUV) radiation increase of the Sun, during mid and strong flares, has been formulated and demonstrated for the most active part of the last Solar ...

    • The hidden Ionosphere: frequent waves, solar flare reaction and higher order effects 

      Hernández Pajares, Manuel; García Rigo, Alberto; Aragón Ángel, María Ángeles (2014-06-26)
      Report de recerca
      Accés obert

    • The ionosphere prediction service prototype for GNSS users 

      Vadakke Veettil, Sreeja; Cesaroni, Claudio; Aquino, Marcio; De Franceschi, Giorgiana; Berrili, Francesco; Rodriguez, Filippo; Spogli, Luca; Del Moro, Dario; Cristaldi, Alice; Romano, Vincenzo; Ronchini, Roberto; Di Rollo, Stefano; Guyader, Eric; Aragón Ángel, María Ángeles (EDP Sciences, 2019)
      Article
      Accés obert
      The effect of the Earth’s ionosphere represents the single largest contribution to the Global Navigation Satellite System (GNSS) error budget and abnormal ionospheric conditions can impose serious degradation on GNSS system ...

    • The selection of basic functions for a time-varying model of unmodeled errors in medium and long GNSS baselines 

      Wang, Jiafu; Yu, Xianwen; Aragón Ángel, María Ángeles; Rovira Garcia, Adrià; Wang, Hao (Multidisciplinary Digital Publishing Institute (MDPI), 2023-10-19)
      Article
      Accés obert
      Unmodeled errors play a critical role in improving the positioning accuracy of Global Navigation Satellite Systems. Few studies have addressed unmodeled errors in medium and long baselines using their time correlation, ...

    • The User Domain Integrity Assessment Technique 

      Sanz Subirana, Jaume; Ramos Bosch, Pedro; Aragón Ángel, María Ángeles; Ciollaro, Massimo; Toran, Felix; Ventura Travesset, Javier; López, C. (2008-12-11)
      Comunicació de congrés
      Accés obert
      This paper presents a study performed for the detailed analysis of user domain and pseudorange integrity on Satellite Based Augmentation Systems. Experimental data of EGNOS pre-operational service was used for some specific ...

    • Toward a SIRGAS service for mapping the ionosphere’s F2 peack parameters 

      Brunini, Claudio Antonio; Azpilicueta, F.; Gende, M.; Aragón Ángel, María Ángeles; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2009)
      Presentació
      Accés restringit per política de l'editorial

    • Use of GNSS derived ionospheric information to detect and measure Solar Flares 

      Hernández Pajares, Manuel; García Rigo, Alberto; Aragón Ángel, María Ángeles (Universidad Complutense de Madrid (UCM), 2014-12)
      Article
      Accés obert
      The Ionosphere, the partially ionized atmospheric r egion ranging from approximately 60 to +1000 km height, is typically affected by spatial and tempor al variations, driven by Local Time (solar illumina - tion), Latitude ...

    • WIDE AREA Real Time Kinematics (WARTK): nuevas posibilidades de posicionamiento y navegación GNSS precisa a escala continental 

      Aragón Ángel, María Ángeles; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2008-05-05)
      Article
      Accés obert
      En este artículo se presenta la nueva técnica Wide Area Real Time Kinematics (WARTK) que permite la extensión de técnicas previas de navegación precisa por satélite, como por ejemplo el Real Time Kinematics (RTK), más allá ...

    • Wide Area RTK: a satellite navigation system based on precise real-time ionospheric modelling 

      Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Hernández Pajares, Manuel; Samson, J; Tossaint, M; Aragón Ángel, María Ángeles; Salazar Hernández, Dagoberto José (2012-04-19)
      Article
      Accés obert
      The Wide Area Real Time Kinematic (WARTK) is an augmentation system concept for multi-frequency users based on precise real-time ionospheric modeling. It is able to provide a high accuracy and integrity GNSS positioning ...

    • Wide-Area RTK: high precision positioning on a continental scale 

      Van der Marel, Hans; Verhagen, Sandra; De Bakker, Peter; Teunissen, Peter J. G.; Odijk, Dennis; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Aragón Ángel, María Ángeles; Ramos Bosch, Pedro; Samson, Jaron; Tossaint, Michel; Albertazzi, Michelangelo (2010-03-31)
      Article
      Accés restringit per política de l'editorial
      Real-time corrections at the decimeter level over an entire continent? The challenge lies in minimizing the ranging errors from signals propagating through the Earth’s atmosphere. European researchers describe how it can ...