Recent Submissions

  • Conditions of consistency for multicomponent stellar systems. II. Is a point-axial symmetric model suitable for the Galaxy? 

    Cubarsí Morera, Rafael (2014-05-27)
    Article
    Open Access
    Under a common potential, a finite mixture of ellipsoidal velocity distributions satisfying the Boltzmann collisionless equation provides a set of integrability conditions that may constrain the population kinematics. ...
  • Conditions of consistency for multicomponent axisymmetric stellar systems. Is an axisymmetric model suitable yet? 

    Cubarsí Morera, Rafael (2013-12-17)
    Article
    Open Access
    Solving the Boltzmann collisionless equatio n under the axisymmetric hypot hesis introduces serious lim itations on describing the kinematics of a single stellar system according to the local Galactic observables. Instead ...
  • 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 ...
  • The epicycle model 

    Cubarsí Morera, Rafael (2013-06)
    Article
    Open Access
    Las soluciones de las ecuaciones del movimiento para una part cula de masa puntual bajo un campo de fuerzas conservativo estan generalmente ligadas a un conjunto b asico de integrales del movimiento, que dependen del ...
  • 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
    Restricted access - publisher's policy
    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 ...
  • C3 in UAS as a means for secondary navigation 

    Ramírez Alcántara, Jorge; Salazar Hernández, Dagoberto José; Prats Menéndez, Xavier; Barrado Muxí, Cristina (2013-01)
    Article
    Open Access
    Unmanned Air Systems (UAS) navigate using Global Navigation Satellite Systems (GNSS), but GNSS vulnerability precludes its use as the only means of navigation and requires a secondary means of navigation. A differentiating ...
  • Monitoring, tracking and forecasting ionospheric perturbations using GNSS techniques 

    Jakowski, N; Béniguel, Yannick; De Franceschi,, Giorgiana; Hernández Pajares, Manuel; Jacobsen, Knut Stanley; Stanislawska, Iwona; Tomasik, Lukasz; Warnant, René; Wautelet, Gilles (2012-12-01)
    Article
    Open Access
    The paper reviews the current state of GNSS-based detection, monitoring and forecasting of ionospheric perturbations in Europe in relation to the COST action ES0803 ‘‘Developing Space Weather Products and Services in ...
  • Global prediction of the vertical total electron content of the ionosphere based on GPS data 

    García Rigo, Alberto; Monte Moreno, Enrique; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Aragón Ángel, María Ángeles; Salazar Hernández, Dagoberto José (2011-12-29)
    Article
    Open Access
    Although vertical total electron content (VTEC) forecasting is still an open subject of research, the use of predictions of the ionospheric state at a scale of several days is an area of increased interest. A global VTEC ...
  • 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
    Open Access
    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 ...
  • Integrity monitoring for carrier phase ambiguities 

    Jofre, Martí; Ramos Bosch, Pedro; Feng, S.; Ochieng, W.; Samson, J; Tossaint, M; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Aragón Ángel, María Ángeles (2012-01)
    Article
    Open Access
    The determination of the correct integer number of carrier cycles (integer ambiguity) is the key to high accuracy positioning with carrier phase measurements from Global Navigation Satellite Systems (GNSS). There are a ...

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