Other
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978kosis..16..238t&link_type=abstract
Kosmicheskie Issledovaniia, vol. 16, Mar.-Apr. 1978, p. 238-249. In Russian.
Other
2
Dipole Antennas, Ionospheric Disturbances, Low Frequencies, Noise Spectra, Plasma Resonance, Satellite Antennas, Cold Plasmas, High Temperature Plasmas, Ionospheric Electron Density, Nonuniform Plasmas, Plasma Temperature, Resonant Frequencies
Scientific paper
Quasi-resonance noise at frequencies near the local lower-hybrid resonance (LHR) frequency is considered which is induced at an antenna located in the ionospheric plasma. It is assumed that the ionospheric plasma is a two-temperature Maxwellian plasma consisting of 'cold' and 'hot' components whose existence is due to the presence of low-energy protons or electrons in the ionosphere. Landau damping by hot electrons and damping due to collisions in the cold component, both near the LHR frequency, are taken into account along with equilibrium and nonequilibrium radiation, contributions of ion-acoustic waves, the contribution of hot particles, acoustic-wave contributions, and nonequilibrium LHR noise associated with plasma instabilities. Spectra of the noise emf induced at an electrical antenna are computed as a function of ionospheric parameters, the temperature and density of hot particles, and various other factors. The behavior of the LHR noise spectra as a function of ionospheric plasma density is discussed on the basis of the results obtained.
Chugunov Iu. V.
Trakhtengerts Iu. V.
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