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Short-term Variability of Non-migrating Tide DE3 (from SABER, TIDI, and MIGHTI) and Impacts on the Ionosphere

Manbharat Dhadly, NRL
McArthur Jones Jr., NRL
Douglas Drob, NRL
Scott Budzien, NRL
First Author's Affiliation
US Naval Reserach Laboratory
Abstract text:

This investigation is focused on resolving daily diurnal eastward propagating tide with zonal number 3 (DE3) (3,3) Hough mode variations and their potential impact on the ionosphere using TIMED/TIDI and SABER, ICON/MIGHTI, COSMIC-2 Global Ionospheric Specification (GIS), and TIME-GCM/NAVGEM. A Hough mode fitting approach was used to estimate (3,3) amplitudes and phases from observations, while Fourier decomposition was utilized for TIME-GCM and COSMIC-2/GIS to validate and probe potential ionospheric impacts. In 2020-2021, TIDI, SABER, and MIGHTI (3,3) daily amplitudes are in good agreement, with correlation coefficients ranging from 0.75-0.86. In 2010, mean daily (3,3) amplitude variability in TIDI and SABER reached ~7 m/s and ~3 K, respectively, but could increase by a factor of 2 or more over a week. Furthermore, strong increases in DE3 from days to weeks correspond with similar increases in ionospheric DE3 amplitudes which reveal the potential impacts of lower atmospheric meteorology on the F-region ionosphere.

Non-Student
Poster category
EQIT - Equatorial Ionosphere or Thermosphere