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Excitation of the Lower Hybrid Resonance by an Antenna in the Ionosphere
Author(s) -
Fejer J. A.
Publication year - 1966
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1002/rds196614447
Subject(s) - ionosphere , physics , antenna (radio) , plasma , dipole , excitation , excited state , rocket (weapon) , computational physics , noise (video) , plasma oscillation , resonance (particle physics) , atomic physics , point source , geophysics , optics , telecommunications , quantum mechanics , computer science , artificial intelligence , engineering , image (mathematics) , aerospace engineering
Ionospheric plasma oscillations near the lower hybrid resonant frequency, excited by an infinitesimally small impulsive dipole source and observed at a point moving away from the source with typical rocket or satellite velocity, are well described by cold plasma theory after a few milliseconds. The field of the oscillations at the observation point decays as the inverse 3/2 power of the time. In practice, oscillating field strengths of a few microvolts per meter should be readily attainable; the detectability of such oscillations depends on the ambient noise level, which is not well known at present.