Solar zenith angle dependence of ionospheric ion and electron temperatures and density on Venus

Details Solar zenith angle dependence of ionospheric ion and electron temperatures and density on Venus Solar zenith angle dependence of ionospheric ion and electron temperatures and density on Venus

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.7759m&link_type=abstract

Journal of Geophysical Research, vol. 85, Dec. 30, 1980, p. 7759-7764. Bundesministerium für Forschung und Technologie

Physics

16

Venus, Ionosphere, Ions, Electrons, Temperature, Density, Pvo Mission, Orpa Instrument, Spacecraft Observations, Dayside, Nightside, Altitude, Heat, Source, Ionopause, Procedure, Flux, Diurnal Variations

Scientific paper

The measurements taken during the first year of the Pioneer Venus orbiter retarding potential analyzer indicate the changes of ion and electron temperatures with solar zenith angles. The ion density decreases by an order of magnitude from dayside to nightside; median ion temperatures above 300 km are constant with the solar zenith angle below 150 deg and reach 2300 K at the ionopause. The ion temperatures below 300 km are almost constant with solar zenith angles during the dayside, but increase with the angles on the nightside. The electron temperatures suggest a constant heat flux into the electron gas at the ionopause which may be supplied by dissipation of energy by the whistler mode plasma waves at the ionopause and/or conduction of heat from the ionosheath through the mantle.

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