Physics
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..579r&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 16, June 1989, p. 579-582.
Physics
17
Planetary Ionospheres, Plasma Waves, Poynting Theorem, Venus Atmosphere, Electron Plasma, Night Sky, Pioneer Venus Spacecraft, Very Low Frequencies, Venus, Ionosphere, Nightside, Flux, Plasma Waves, Pvo Mission, Lightning, Spacecraft Observations, Electrical Fields, Bursts, Atmosphere, Emissions, Origin, Source, Altitude, Magnetic Fields
Scientific paper
Even though the Pioneer Venus plasma wave instrument returns a measure of only one component of the electric field due to waves, for the 100 Hz channel it is possible to calcualte an approximate Poynting flux of the waves by making several assumptions. When this is done the Poynting flux at lowest altitudes in a 30 Hz band centered on 100 Hz is found to be about 10 to the -7th W/sq m, independent of ionospheric conditions as indicated by the strength of the magnetic field. The local time variation of the approximate Poynting flux shows a maximum from about 2000 to 2200 LT in accord with inferences from the higher frequency channels. The observed wave energy flux is consistent with that expected from lightning given rates and flash strengths on Venus that are similar to or greater than that of the earth.
Russell Christopher T.
Strangeway Robert J.
von Dornum M.
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