Physics
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984rpspr...2...78p&link_type=abstract
In its USSR Rept.: Space (JPRS-USP-84-005) p 78 (SEE N85-11060 02-12) Transl. into ENGLISH from Kosm. Issled. (Moscow), v. 22
Physics
Ionospheric Electron Density, Solar Activity Effects, Solar Position, Venus Atmosphere, Atmospheric Models, Photochemical Reactions, Planetary Ionospheres, Solar Planetary Interactions, Vertical Distribution, Zenith
Scientific paper
The area of altitudes from 100 to 200-220 km with sun zenith angles of between 0 and 90 is studied. A model derived in an earlier work is used to study the variation in electron concentration in the area of the major and minor maxima of the Venusian daytime ionosphere as a function of solar zenith angle and solar activity. Further studies of the physical and chemical processes determining the composition of the ionosphere are planned to simplify the method of theoretical modeling of the ionospheric composition. It is shown that at the lower maximum the calculated values of Ne do not fit linear variation of Ne as a function of (Ch x)(-1/2) as is suggested in the simple layer theory of Chapman. The areas of the major and upper electron concentration maxima are formed primarily by solar radiation at between 250 and 900 A, at the lower maximum - by solar radiation at 10 to 200 A and photoelectrons. A group of chemically active components is identified whose concentration is determined by photochemical reactions with the participation of only oxygen, carbon, carbon monoxide, carbon dioxide and helium ions, electrons and neutral components.
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