Physics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1673s&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 39, Dec. 1991, p. 1673-1676.
Physics
11
Electromagnetic Fields, Ionospheric Conductivity, Ionospheric Electron Density, Mars Atmosphere, Resonant Frequencies, Atmospheric Models, Magnetohydrodynamics, Planetary Ionospheres, Thunderstorms, Wave Excitation
Scientific paper
A conductive ionosphere and a totally nonconductive layer of the atmosphere close to the surface of the planet form a quasi-spherical concentric resonator. This provides the possibility of global resonances of an electromagnetic field generated by thunderstorm activity or by hydromagnetic waves excited in an upper ionosphere and transformed into ordinary electromagnetic waves while penetrating the resonator. An estimate of resonance frequencies is given for a Martian resonator: f1 is about 13-14 Hz, f2 is about 24-26 Hz, f3 is about 35-38 Hz, etc. for two essentially different models of electron-density distribution in the low ionosphere of Mars. The corresponding estimated quality values are low: Qn is about 2-4. A relatively wide range of the quality variation depending on a model of averaged altitudinal electron-density distribution in the low ionosphere of Mars yields the criterion for an adequate model.
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