Now showing items 21-40 of 78

  • Final report on EGNOS default ionospheric conditions. Volume 1: Selection and justification of indicators and analysis against past EGNOS performance 

    Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2013-01-10)
    External research report
    Restricted access - author's decision
  • Final report on EGNOS default ionospheric conditions. Volume 2: selection of ionospheric conditions: indicator thresholds 

    Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2013-01-10)
    External research report
    Restricted access - author's decision
  • 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 ...
  • GNSS data management and processing with the GPSTk 

    Salazar Hernández, Dagoberto José; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2010)
    Article
    Restricted access - publisher's policy
    We organize complex problems in simple ways using a GNSS data management strategy based on ‘‘GNSS Data Structures’’ (GDS), coupled with the open source ‘‘GPS Toolkit’’ (GPSTk) suite. The code resulting from using the ...
  • GNSS-Lab tool architecture design document 

    Ramos Bosch, Pedro; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2009-10-29)
    External research report
    Restricted access - confidentiality agreement
    This document contains the detailed information related to the design and architecture of the gLAB software package.
  • GNSS-Lab tool Software User Manual 

    Ramos Bosch, Pedro; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2010-10-08)
    External research report
    Restricted access - author's decision
  • GNSS-Lab tool user software requirements specification 

    Ramos Bosch, Pedro; Sanz Subirana, Jaume; Hernández Pajares, Manuel; Juan Zornoza, José Miguel (2009-05-07)
    External research report
    Restricted access - confidentiality agreement
  • GPS differential code biases determination: methodology and analysis 

    Sanz Subirana, Jaume; Juan Zornoza, José Miguel; Rovira Garcia, Adrià; González Casado, Guillermo (2017-10)
    Article
    Open Access
    We address two main problems related to the receiver and satellite differential code biases (DCBs) determination. The first issue concerns the drifts and jumps experienced by the DCB determinations of the International ...
  • High accuracy positioning using carrier-phases with the opensource GPSTK software 

    Salazar Hernández, Dagoberto José; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2008-12-12)
    Article
    Open Access
    The objective of this work is to show how using a proper GNSS data management strategy, combined with the flexibility provided by the open source "GPS Toolkit" (GPSTk), it is possible to easily develop both simple ...
  • Higher education in Spain 

    Romero Sánchez, Jesús; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2016-02-01)
    External research report
    Open Access
  • ICASES scenarios Final Report 

    Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2013-12-11)
    External research report
    Restricted access - confidentiality agreement
  • Improved characterization and modeling of equatorial plasma depletions 

    Blanch Llosa, Estefania; Altadill, David; Juan Zornoza, José Miguel; Camps Carmona, Adriano José; Barbosa, José; González Casado, Guillermo; Riba Sagarra, Jaume; Sanz Subirana, Jaume; Vázquez Grau, Gregorio; Orús Pérez, Raul (2018-08-22)
    Article
    Open Access
    This manuscript presents a method to identify the occurrence of Equatorial Plasma Bubbles (EPBs) with data gathered from receivers of Global Navigation Satellite System (GNSS). This method adapts a previously existing ...
  • Improved modelling of ionospheric disturbances for remote sensing and navigation 

    Camps Carmona, Adriano José; Barbosa, José; Juan Zornoza, José Miguel; Blanch Llosa, Estefania; Altadill, David; González Casado, Guillermo; Vázquez Grau, Gregorio; Riba Sagarra, Jaume; Orus-Perez, Raul (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Restricted access - publisher's policy
    A generic software tool to evaluate the impact of ionospheric disturbances is presented, including low and high latitude physically-based models, and low and high frequency fluctuations. This tool has been developed ...
  • 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 ...
  • Improvement of the ionospheric radio occultation retrievals by means of accurate global ionospheric maps 

    Shao, Yixie; González Casado, Guillermo; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Rovira Garcia, Adrià (2018-12-22)
    Article
    Restricted access - author's decision
    The Abel inversion method is the classic approach to retrieve electron density profiles from radio occultation measurements, assuming that the electron density is only dependent upon height. In the early 2000s, the total ...
  • 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 ...
  • IONI-R and IONA-R scenarios report 

    Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2013-04-26)
    External research report
    Restricted access - author's decision
  • Ionosphere/Plasmasphere sounding with ground and space-based GNSS observations 

    González Casado, Guillermo; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Shao, Yixie (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Open Access
    Applying a methodology developed and tested in previous studies, the contribution from the ionospheric and plasmaspheric regions to the total electron content (measured by ground receivers) is analyzed. ...
  • Ionospheric activity in the South East Asian region 

    Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Prieto, Roberto; Schlueter, Stefan (2013)
    Conference lecture
    Restricted access - publisher's policy
    A SBAS Ionospheric Activity indicator, based in the RMS of Along Arc TEC Rate (AATR) computations has been defined by the gAGE/UPC authors in the context of previous studies on EGNOS Ionosphere. This indicator can be easily ...