New empirical models of the electron temperature and density in the Venus ionosphere with application to transterminator flow

Details New empirical models of the electron temperature and density in the Venus ionosphere with application to transterminator flow New empirical models of the electron temperature and density in the Venus ionosphere with application to transterminator flow

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.1477t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, March 1, 1984, p. 1477-1488.

Physics

57

Atmospheric Models, Electron Energy, Ionospheric Electron Density, Planetary Ionospheres, Venus Atmosphere, Computer Programs, Error Functions, Ion Currents, Night Sky, Pioneer Venus Spacecraft, Pioneer Venus 1 Spacecraft, Tables (Data), Venus, Models, Electrons, Temperature, Density, Ionosphere, Flow, Pioneer Venus, Orbiters, Pvo, Electron Temperature Probe, Harmonics, Altitude, Gradients, Momentum, Ions, Nightside, Velocity, Wind, Comparisons

Scientific paper

The continuing rise of periapsis has allowed the Pioneer Venus orbiter (PVO) to encounter vast regions of the Venus ionosphere that were not sampled earlier when propulsion was being used to maintain periapsis deep in the ionosphere. The authors have employed the orbiter electron temperature probe measurements from the first seven Venus years (December 1978 - December 1982) to devise new empirical models of electron temperature Te and density Ne. They employ these models to perform a two-dimensional solution of the momentum equation for the nightward ion flow velocities believed to be largely responsible for the maintenance of the nightside ionosphere. The velocities at the terminator rise from the neutral atmospheric wind velocity (≡300 m/s) at 150 km to a peak velocity exceeding 2000 m/s above 500 km, in general agreement wih PVO measurements of ion drift in that region.

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