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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• Multi-instrument analysis of L-band amplitude scintillation observed over the Eastern Arabian Peninsula

  Publication

  • A. M. Darya
  • M. M. Shaikh
  • G. Nykiel
  • E. Ghamry
  • I. Fernini

  - ADVANCES IN SPACE RESEARCH - Year 2024

  The study of scintillation-causing ionospheric irregularities is important to mitigate their effects on satellite communications. It is also important due to the spatial and temporal variability of these irregularities, given that their characteristics differ from one region to another. This study investigates the spatial and temporal characteristics of L1 amplitude scintillation-causing ionospheric irregularities over the Eastern...

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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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• Global burden and strength of evidence for 88 risk factors in 204 countries and 811 subnational locations, 1990–2021: a systematic analysis for the Global Burden of Disease Study 2021

  Publication

  • M. Brauer
  • G. Roth
  • A. Aravkin
  • P. Zheng
  • K. Abate
  • Y. Abate
  • C. Abbafati
  • R. Abbasgholizadeh
  • M. Abbasi
  • M. Abbasian... and 1785 others

  - The Lancet - Year 2024

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• Global fertility in 204 countries and territories, 1950–2021, with forecasts to 2100: a comprehensive demographic analysis for the Global Burden of Disease Study 2021

  Publication

  • N. Bhattacharjee
  • A. Schumacher
  • A. Aali
  • Y. Abate
  • R. Abbasgholizadeh
  • M. Abbasian
  • M. Abbasi-Kangevari
  • H. Abbastabar
  • S. Abd
  • S. Abd-Elsalam... and 1395 others

  - The Lancet - Year 2024

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• Burden of disease scenarios for 204 countries and territories, 2022–2050: a forecasting analysis for the Global Burden of Disease Study 2021

  Publication

  • S. Vollset
  • H. Ababneh
  • Y. Abate
  • C. Abbafati
  • R. Abbasgholizadeh
  • M. Abbasian
  • H. Abbastabar
  • A. Abd
  • S. Abd
  • A. Abdelkader... and 1408 others

  - The Lancet - Year 2024

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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 4372 others

  - The Lancet - Year 2022

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