Computer Science – Numerical Analysis
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...100..289a&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 100, no. A1, p. 289-304
Computer Science
Numerical Analysis
Earth Ionosphere, Electric Fields, Electromagnetic Radiation, Extremely Low Frequencies, Magnetic Resonance, Oscillations, Plasma Decay, Plasmas (Physics), Magnetohydrodynamic Stability, Numerical Analysis, Plasma Spectra
Scientific paper
Results of detailed numerical calculations of some parametric decay effects, arising in a magnetoplasma under the influence of a HF, suggiciently strong electric field (vector)E = (vector)Ep center dot cos omegaEpislont, are given in this paper. The resonance branches and the very low frequency (VLF) parametric resonances are calculated in the ionopshere at altitudes Z = 200, 300, and 400 km. Calculations i the resonance regions omegaEpsilon = s omega0 (omega0 is the electron Langgmuir frequency, s= 1,2,...) were done in the cold plasma and also inthe kinetic approximations. It is shown that the angle dependence omega1) (theta, Epsilonp not equivalent to 0) of the extremely low frequency (ELF) (0 less than omega equal to or less than OmegaBeta resonance branch is close to the cosine law. This is in contrast with the earlier published results and with the angle dependence omega1 (theta, Epsilon = 0). This important effect and the other dependencies given in the paper may be used for the search of the parametric instabilities and of the electric field in the ionosphere and magnetosphere, especially by experiments in situ on satellites.
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