Speaker
Description
Pole-to-pole VTEC data from the Madrigal GNSS network on May 10–12 and October 10–12, 2024, were analyzed to diagnose the ionospheric response during the May superstorm and the October severe storm. VTEC, superimposed with S4 and Sigma-phi scintillation, was used to study the spatiotemporal evolution of small-scale irregularities, while ROTI data from the ISEE GNSS network complemented the analysis by examining large-scale irregularities during both events.
The meridional average of zonal drift and ROTI keograms at 90°–60°W and 60°–90°E longitudes revealed an eastward PPEF response, which favored the development of both small- and large-scale irregularities, while suppression was observed in the westward PPEF. The ROTI keogram indicated a strong hemispheric connection of plasma depletions during the October storm, supported by variations in the thermospheric O/N₂ ratio during the storm's onset and recovery phases.
The results concluded that the October storm had a greater impact on Earth's ionosphere compared to the May storm, leading to extreme scintillations that are highly detrimental to systems that rely on radio signals.
| Do you plan to attend in-person or online? | Online |
|---|
