Browsing by Author "Altadill, David"

Now showing items 1-13 of 13

    • A method for real-time identification and tracking of traveling ionospheric disturbances using ionosonde data: first results 

      Altadill, David; Segarra, Antoni; Blanch, Estefania; Juan Zornoza, José Miguel; Paznukhov, Vadym V.; Buresova, Dalia; Galkin, Ivan; Reinisch, Bodo W.; Belehaki, Anna (2020-01-20)
      Article
      Open Access
      Traveling Ionospheric Disturbances (TIDs) are wave-like propagating irregularities that alter the electron density environment and play an important role spreading radio signals propagating through the ionosphere. A method ...

    • Assessment of the F2-layer electron density peak inferred from Formosat-3/COSMIC radio occultations over half a Solar Cycle 

      Aragon-Angel, Angela; Limberger, Marco; Hernández Pajares, Manuel; Altadill, David; Dettmering, Denise (2016)
      Conference report
      Restricted access - publisher's policy
      GNSS radio occultation (RO) measurements have become crucial to provide valuable information on the vertical electron density structure of the Ionosphere. Ionospheric key parameters such as the maximum electron density ...

    • Evaluation of the ionospheric F2 characteristics inferred from radio occultations exploiting the availability of FORMOSAT-3/COSMIC data over half a solar cycle 

      Aragón Ángel, Maria Angeles; Limberger, Marco; Hernández Pajares, Manuel; Altadill, David; Erdogan, Eren; Schmidt, Michael (ION Publications (The Institute of navigation), 2016)
      Conference report
      Restricted access - publisher's policy
      This contribution presents the assessment, on both the maximum electron density (NmF2) and the corresponding peak height of the F2 layer (hmF2), of the overall performance of such ionospheric key parameters inferred from ...

    • 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
      Open Access
      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 ...

    • 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

    • 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 ...

    • Ionospheric tilt measurements: application to traveling ionospheric disturbances climatology study 

      Paznukhov, Vadym V.; Altadill, David; Juan Zornoza, José Miguel; Blanch, Estefania (2020-02-06)
      Article
      Open Access
      Ionospheric tilt is a concept used to characterize local horizontal electron density gradients in the ionosphere using a mirror reflection model. Experimental results are presented that illustrate the validity and accuracy ...

    • Long-term comparison of the ionospheric F2 layer electron density peak derived from ionosonde data and Formosat-3/COSMIC occultations 

      Limberger, Marco; Hernández Pajares, Manuel; Aragón Àngel, Angela; Altadill, David; Dettmering, Denise (2015-06-15)
      Article
      Open Access
      Electron density profiles (EDPs) derived from GNSS radio occultation (RO) measurements provide valuable information on the vertical electron density structure of the ionosphere and, among others, allow the extraction of ...

    • Report on the design and specifications of the TID algorithms and products 

      Altadill, David; Belehaki, Anna; Blanch, Estefania; Buresova, Dalia; Galkin, Ivan; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Segarra, Antoni; Timoté Bejarano, Cristhian Camilo (2018-05-31)
      Research report
      Open Access
      TechTIDE project, funded by the European Commission Horizon 2020 research and innovation program [AD-1], will establish a pre-operational system to demonstrate reliability of a set of TID (Travelling Ionospheric Disturbances) ...

    • Report on the final TechTIDE products 

      Altadill, David; Belehaki, Anna; Segarra, Antoni; Blanch, Estefania; Buresova, Dalia; Ioanna, Tsagouri; Borries, Claudia; Galkin, Ivan; Haralambous, Haris; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Oikonomou, Christina; Chum, Jaroslav; Timoté Bejarano, Cristhian Camilo (2019-10-31)
      Research report
      Open Access
      The document presents a report on the final products in TechTIDE. The TID identification codes in TechTIDE have been adjusted since its first release driven by the assessment of the TID impact on aerospace and ground systems ...

    • Report on TID algorithms 

      Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Altadill, David; Belehaki, Anna; Blanch, Estefania; Borries, Claudia; Buresova, Dalia; Galkin, Ivan; Haralambous, Haris; Ivan, Kutiev; Oikonomou, Christina; Ioanna, Tsagouri (2018-08-31)
      Research report
      Open Access
      TechTIDE project, funded by the European Commission Horizon 2020 research and innovation program [AD-1], will establish a pre-operational system to demonstrate reliability of a set of TID (Travelling Ionospheric ...

    • St. Patrick’s Day 2015 geomagnetic storm analysis based on Real Time Ionosphere Monitoring 

      García Rigo, Alberto; Roma Dollase, David; Hernández Pajares, Manuel; Li, Zishen; Terkildsen, Michael; Ghoddousi Fard, Reza; Dettmering, Denise; Erdogan, Eren; Haralambous, Haris; Beniguel, Yannick; Berdermann, Jens; Kriegel, Martin; Krypiak-Gregorczyk, Anna; Gulyaeva, Tamara L.; Komjathy, Attila; Vergados, Panagiotis; Feltens, Joachim; Zandbergen, René; Olivares, German; Fuller Rowell, Tim; Altadill, David; Blanch, Estefania; Bergeot, Nicolas; Krankowski, Andrzej; Agrotis, Loukis; Galkin, Ivan; Orus-Perez, Raul; Prol, Fabricio dos Santos (2017)
      Conference lecture
      Open Access
      A detailed analysis is presented for the days in March, 2015 surrounding St. Patrick’s Day 2015 geomagnetic storm, based on the existing real-time and near real-time ionospheric models (global or regional) within the ...