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Evidence of gravity waves at E‐region heights
Author(s) -
Giraldez Alberto E.
Publication year - 1980
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl007i002p00170
Subject(s) - ionosphere , equator , northern hemisphere , spectral line , geology , physics , geophysics , gravity wave , southern hemisphere , magnitude (astronomy) , geodesy , electron density , atmospheric sciences , gravitational wave , computational physics , electron , astrophysics , climatology , latitude , astronomy , quantum mechanics
Electron density fluctuations of Sporadic‐E structures lasting several hours without appreciable change in height for days with associated large scale TIDś at F‐Region are under analysis for a latitudinal chain of five ionospheric stations in the South Hemisphere sector. The existence of travelling disturbances at E‐Region affecting Es layers is observed, with propagational velocity towards equator between 250 and 600 m/sec. Power spectra analysis of data shows a few discrete frequencies and a broad band. Comparison of discrete spectra components among stations demonstrate that the wave period grows linearly with distance from the source.