Physics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ineps.100..321s&link_type=abstract
Indian Academy of Sciences, Proceedings (Earth and Planetary Sciences) (ISSN 0253-4126), vol. 100, no. 4, Dec. 1991, p. 321-330.
Physics
Lightning, Planetary Ionospheres, Plasma Waves, Venus Atmosphere, Venus Clouds, Wave Generation, Electromagnetic Radiation, Electrostatic Waves, Pioneer Venus 1 Spacecraft
Scientific paper
The plasma waves in the Venus ionosphere measured by OEFD aboard PVO are analyzed. It is shown that these waves are generated by lightning like cloud-to-cloud discharges anywhere in the Venus ionosphere-surface waveguide. The theoretical minimum attenuation for waveguide mode propagation at 5.4 kHz is consistent with the maximum occurrence rate at this frequency. The lightning-generated and globally-propagating signals when encountered with plasma holes or ion-trough structures escape out partially and are detected by the OEFD aboard PVO. The 100 Hz signals can propagate upwards in whistler mode. Even the localized electrostatic mode waves would be converted into electromagnetic waves in the plasma holes and ion-trough regions.
Narain Singh Rishi
Upadhyay Hari O.
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