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Fine structure in ionospheric Alfvén resonator spectra observed at low latitude ( L = 1.3)
Author(s) -
Bösinger T.,
Demekhov A. G.,
Trakhtengerts V. Y.
Publication year - 2004
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 - 10.1029/2004gl020777
Subject(s) - ionosphere , resonator , physics , low latitude , spectral line , latitude , field line , coupling (piping) , f region , computational physics , range (aeronautics) , noise (video) , line (geometry) , geophysics , atmospheric sciences , optics , magnetic field , materials science , astronomy , geometry , image (mathematics) , quantum mechanics , artificial intelligence , computer science , metallurgy , composite material , mathematics
A fine spectral structure in the electromagnetic background noise at 0.1 to 6 Hz is observed at a low latitude station. Its frequency scale falls roughly within the range of low‐latitude field‐line resonances (FLR), but the reported structure reveals a much higher quality factor than is usually found in FLR observations. It is interpreted here in terms of coupling between the ionospheric Alfvén resonator (IAR) and conventional field line resonances.