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Theoretical and simulation studies of broad up‐shifted sideband generation in ionospheric stimulated radiation
Author(s) -
Hussein A. A.,
Scales W. A.,
Huang J.
Publication year - 1998
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 - 10.1029/98gl50568
Subject(s) - sideband , nonlinear system , physics , ionosphere , computational physics , radiation , parametric statistics , statistical physics , optics , geophysics , quantum mechanics , microwave , mathematics , statistics
A second order four‐wave parametric process proposed to be responsible for the generation of the broad up‐shifted sideband in ionospheric stimulated radiation is studied by using a theoretical model and one dimensional electrostatic particle‐in‐cell simulations. The results indicate that (1) the initial evolution in nonlinear simulations is well described by the proposed theoretical model, (2) the simulation frequency power spectrum in a saturated nonlinear state exhibits important characteristics of the experimental observations and (3) the full nonlinear evolution of this four‐wave process is crucial in interpreting the asymmetric nature of the wave frequency spectrum observed during experiments.