Distribution of electron concentration in nightime atmosphere of Venus based on radio transmission data

Details Distribution of electron concentration in nightime atmosphere of Venus based on radio transmission data Distribution of electron concentration in nightime atmosphere of Venus based on radio transmission data

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987rpsct...2...82o&link_type=abstract

In its JPRS Report: Science and Technology. USSR: Space p 82 (SEE N88-16063 08-42) Transl. into ENGLISH from Kosmicheskiye Issle

Computer Science

Atmospheric Stratification, Ionospheric Electron Density, Night, Planetary Ionospheres, Solar Activity Effects, Venus Atmosphere, Periodic Variations, Plasmasphere, Radio Occultation, Radio Transmission, Solar Cycles

Scientific paper

Some new results are presented, obtained from the Venera 15 and 16 spacecraft, and all information available at the present on the altitude profiles of the electron concentration on the night side of the planet Venus are analyzed. The comparative analysis determined slow variations in the characteristics of the nighttime Venusian ionosphere related to the phase of the 11 year solar activity cycle. The ionosphere is found to vary greatly with both location and time. The characteristics of altitude profiles of electron concentration change with the phase of the solar activity cycle. The mean value of electron concentration at the maximum of the main nighttime Venusian ionosphere layer is 30 to 70 percent greater during periods of maximum solar activity than during periods of low activity. An extensive plasma envelope extending to about 1,000 km is located above the main ionospheric layer during the years of high solar activity. This plasma tail is not observed during the years of low activity.

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