Other
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..991p&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 10, p. 991-994.
Other
12
Electric Fields, Planetary Ionospheres, Planetary Magnetic Fields, Venus Atmosphere, Plasma Layers, Statistical Analysis, Venus, Ionosphere, Ionosheath, Magnetic Field, Magnetic Properties, Statistical Methods, Analysis, Electric Field, Spacecraft Observations, Pvo Mission, Boundaries, Intensity, Rotation, Oefd Instrument, Plasma, Opa Instrument, Friction, Stratification, Downstream
Scientific paper
Results of a statistical analysis of the magnetic properties of the intermediate transition of the Venus ionosheath based on the magnetic field data of the Pioneer Venus Orbiter are reported. It is found that the transition is often characterized by a substantial decrease in magnetic field intensity and an accompanying rotation to a direction that is more closely aligned with the sun-Venus axis. In other cases, the 30 kHz bursts occur outside a region of enhanced magnetic field reminiscent of the magnetic barrier external to the Venus dayside ionopause. The rotation of the magnetic field toward the sun-Venus line associated with the 30 kHz bursts is also evident here, but generally the conditions change more gradually. Possible mechanisms of these variations and ionospheric plasma expansion are examined.
Intriligator Devrie S.
Perez-de-Tejada H.
Strangeway Robert J.
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