Seasonality of the Local-time Variations in Formosat-3/COSMIC S4 Indices and Ionospheric Electron Density

Cornelius Csar Jude H. Salinas, Loren C. Chang

Abstract: This work aims to determine the seasonality of the local-time variations in ionospheric scintillation and ionospheric electron density as observed by Formosat-3/COSMIC. COSMIC quantifies ionospheric scintillation with the S4 index. S4 index and ionospheric electron density profiles from COSMIC will be gridded into bi-monthly local-time latitude bins. Previous studies have already shown that local-time variabilities in the ionosphere are driven by atmospheric tides. These tides were also shown to peak during Equinox and Solstice seasons. And so, we will present the average local-time latitude profiles in March Equinox, September Equinox, June Solstice and December Solstice. Comparing these tidal signatures in S4 index and in electron density local-time variations will provide us insights on how atmospheric tides affect ionospheric scintillation.
Published in: Proceedings of the ION 2019 Pacific PNT Meeting
April 8 - 11, 2019
Hilton Waikiki Beach
Honolulu, Hawaii
Pages: 190 - 198
Cite this article: Salinas, Cornelius Csar Jude H., Chang, Loren C., "Seasonality of the Local-time Variations in Formosat-3/COSMIC S4 Indices and Ionospheric Electron Density," Proceedings of the ION 2019 Pacific PNT Meeting, Honolulu, Hawaii, April 2019, pp. 190-198.
https://doi.org/10.33012/2019.16803
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