Search results for: ROTI

• Relationship between GIX, SIDX, and ROTI ionospheric indices and GNSS precise positioning results under geomagnetic storms

  Publication

  • G. Nykiel
  • J. A. Cahuasquí
  • M. M. Hoque
  • N. Jakowski

  - GPS SOLUTIONS - Year 2024

  Ionospheric indices give information about ionospheric perturbations, which may cause absorption, diffraction, refraction, and scattering of radio signals, including those from global navigation satellite systems (GNSS). Therefore, there may be a relationship between index values and GNSS positioning results. A thorough understanding of ionospheric indices and their relationship to positioning results can help monitor and forecast...

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• Ionospheric scintillations computation using real-time GPS observations

  Publication

  • G. Nykiel
  • L. Rachoń
  • M. Figurski

  - Artificial Satellites, Journal of Planetary Geodesy - Year 2014

  The following paper presents the results of quasi-real-time determination of the values of phase scintillations indices at the period of ionospheric disturbances that occurred as a consequence of the Sun flares observed on March 7 and 9, 2012. Double-frequency observations with 1-second measurement interval from the EPN (EUREF Permanent Network) network sites located at high latitudes were used for the analysis. To determine the phase...

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• Elective surgery system strengthening: development, measurement, and validation of the surgical preparedness index across 1632 hospitals in 119 countries

  Publication

  • T. Abbott
  • M. Abou
  • D. Chaudhry
  • J. Davies
  • A. Desai
  • M. Fiore
  • J. Fitzgerald
  • A. Fowler
  • K. Futaba
  • R. Gujjuri... and 4373 others

  - The Lancet - Year 2022

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