Now showing items 1-20 of 25

    • Comparative testing of four ionospheric models driven with GPS measurements 

      Zandbergen, R.; Feltens, Joachim; Angling, M; Jackson Booth, N; Jakowski, Norbert; Hoque, Mainul; Hernández Pajares, Manuel; Aragón Ángel, María Ángeles; Orús Pérez, Raül (2011-07-28)
      Article
      Open Access
      In the context of the European Space Agency/European Space Operations Centre funded Study “GNSS Contribution to Next Generation Global Ionospheric Monitoring,” four ionospheric models based on GNSS data (the Electron ...
    • 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)
      Conference lecture
      Open Access
    • Distribution and mitigation of higher-order ionospheric effects on precise GNSS processing 

      Hernández Pajares, Manuel; Aragón Ángel, María Ángeles; Defraigne, Pascale; Bergeot, Nicolas; Prieto Cerdeira, Roberto; García Rigo, Alberto (2014-04)
      Article
      Open Access
      Higher-order ionospheric effects (I2+) are one of the main limiting factors in very precise Global Navigation Satellite Systems (GNSS) processing, for applications where millimeter accuracy is demanded. This paper summarizes ...
    • 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 ...
    • Estudi geològic i d'usos del sòl a la cordillera del Bálsamo i estudi de paràmetres geotècnics a l'AMSS 

      Aragón Ángel, María Ángeles (2006)
      Poster (CCD project)
      Open Access
    • 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
      Restricted access - publisher's policy
      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 ...
    • 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)
      Conference report
      Restricted access - confidentiality agreement
    • 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 ...
    • Impact of higher order ionospheric delay on precise GNSS computation 

      Hernández Pajares, Manuel; Aragón Ángel, María Ángeles; Defraigne, Pascale; Bergeot, Nicolas; Prieto Cerdeira, Roberto; Sanz Subirana, Jaume (2013)
      Conference report
      Open Access
    • Improved Abel transform inversion: application to COSMIC/FORMOSAT-3 ionospheric occultations 

      Aragón Ángel, María Ángeles; Hernández Pajares, Manuel; Miguel Juan, Miguel; Sanz Subirana, Jaume; Altadill, David; Liou, Yuei­An; Lee, Chien­Chih (2008-10-02)
      Conference lecture
      Open Access
    • Improvement and validation of retrieved FORMOSAT-3/COSMIC electron densities using Jicamarca DPS 

      Aragón Ángel, María Ángeles; Liou, Y.-A.; Lee, C.C.; Hernández Pajares, Manuel; Sanz Subirana, Jaume; Juan Zornoza, José Miguel; Reinisch, B.W. (2010)
      Lecture
      Open Access
    • Improvement of retrieved FORMOSAT-3/COSMIC electron densities validated by ionospheric sounder measurements at Jicamarca 

      Aragón Ángel, María Ángeles; Liou, Y.-A.; Lee, C.-C.; Reinisch, B.W.; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2011-09-01)
      Article
      Open Access
      Inversion techniques applied to GPS‐LEO radio occultation data allow the retrieval of accurate and worldwide‐distributed refractivity profiles, which, in the case of the ionosphere, can be converted into electron densities ...
    • 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 ...
    • Looking for efficient and accurate ways of computing the global ionospheric electron density distribution from huge amounts of GNSS observations 

      Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Monte Moreno, Enrique; Aragón Ángel, María Ángeles (2011)
      Lecture
      Open Access
      In this work the authors will explore different potential ways of estimating efficiently and accurately the global number density of ionospheric free electrons from the most part of nowadays available GNSS ...
    • Mejora de la transformada inversa de Abel: aplicación ocultaciones ionosféricas de COSMIC/FORMOSAT-3 

      Aragón Ángel, María Ángeles; Hernández Pajares, Manuel; Miguel, J.; Sanz Subirana, Jaume (2008-09-24)
      Conference lecture
      Open Access
    • Modelizando el calculo de varias variablEEES en el aula 

      Aragón Ángel, María Ángeles; Cubarsí Morera, Rafael (2011-06)
      Article
      Open Access
      La implantaci on de la modelizaci on matem atica en el ambito del Espacio Europeo de Educaci on Superior (EEES) necesita de una revisi on y adaptaci on de los contenidos y estrategias para abordar las asignaturas, en ...
    • Modelizando el cálculo de varias variablEEES en el aula 

      Aragón Ángel, María Ángeles; Cubarsí Morera, Rafael (2010-06)
      Conference lecture
      Open Access
      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, ...
    • 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)
      Conference report
      Open Access
      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, ...
    • 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)
      Conference lecture
      Open Access
      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 ...
    • 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)
      Conference report
      Restricted access - publisher's policy
      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 ...