Plasma and electric field measurements of the PVO in the Venus ionosheath

Details Plasma and electric field measurements of the PVO in the Venus ionosheath Plasma and electric field measurements of the PVO in the Venus ionosheath

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11...31p&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 11, Jan. 1984, p. 31-34.

Physics

19

Atmospheric Electricity, Pioneer Venus Spacecraft, Plasma Diagnostics, Solar Planetary Interactions, Space Plasmas, Venus Atmosphere, Electrical Measurement, Planetary Ionospheres, Plasma Waves, Venus, Ionosphere, Ionosheath, Plasmas, Electric Fields, Orbiters, Pvo, Pioneer Venus, Particles, Flux, Intensity, Boundaries, Waves, Wakes, Electric Field Detector, Observations, Turbulence

Scientific paper

A study of the plasma and electric-field measurements of the PVO in the Venus ionosheath near the terminator region is presented. A drastic decrease of the particle-flux intensity measured with the plasma instrument is encountered in the inner ionosheath before the inbound crossing of the ionopause. The outer boundary of the region of weak plasma fluxes is consistent with the presence of a rarefaction wave as reported previously from the Mariner 5 (Bridge et at., 1967), Venera (Verigin et al., 1978) and PVO (Spenner et al., 1980) plasma measurements in the Venus wake. Near that boundary there are, in addition, appreciable changes in the electric field signals detected with the PVO electric-field detectors. These observations suggest the existence of local plasma-wave activity associated with turbulent flow conditions in that region.

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