The long-term behavior of the main peak of the dayside ionosphere of Venus during solar cycle 21 and its implications on the effect of the solar cycle upon the electron temperature in the main peak region

Details The long-term behavior of the main peak of the dayside ionosphere of Venus during solar cycle 21 and its implications on the effect of the solar cycle upon the electron temperature in the main peak region The long-term behavior of the main peak of the dayside ionosphere of Venus during solar cycle 21 and its implications on the effect of the solar cycle upon the electron temperature in the main peak region

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9413339k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Oct. 1, 1989, p. 13339-13351.

Physics

23

Electron Energy, Planetary Ionospheres, Solar Planetary Interactions, Venus Atmosphere, Daytime, Ionospheric Electron Density, Solar Cycles, Solar Position, Venus, Dayside, Ionosphere, Solar Effects, Cycles, Electrons, Data, Temperature, Spacecraft Observations, Venera 9 Mission, Venera 10 Mission, Ultraviolet, Wavelengths, Theoretical Studies, Models, Production Rate, Thermosphere, Altitude, Radio Methods, Occultations, Pvo Mission, Density, Oetp Instrument, Oims Instrument, Orpa Instrument, Orbiters, Calc

Scientific paper

Results are presented on the long-term behavior of the main peak electron density in the Venus ionosphere during the solar cycle 21, based on 104 radio occultation measurements of the vertical electron density profile in the dayside ionosphere of Venus carried out aboard the Pioneer Venus Orbiter spacecraft (along with published data on 11 Venera 9-10 measurements). The equation representing the electron temperature at h = 140 km is presented. The results imply that the electron temperature at h = 140 km decreased by about 25 percent from solar maximum to solar minimum, compared to a decrease of 50-75 percent above 200 km found by Kliore and Mullen (1989).

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