Computer Science
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..753a&link_type=abstract
Planetary and Space Science, vol. 27, June 1979, p. 753-768.
Computer Science
7
Collision Rates, Electron Scattering, Ionospheric Propagation, Nonuniform Plasmas, D Region, Ionic Collisions, Molecular Gases, Neutral Particles, Nitrogen, Vertical Distribution
Scientific paper
A unified ionospheric electron collision frequency model profile has been calculated in the height range 50-500 km. The computed profile accounts for the electron collisions with the neutral particles as well as the ions. Experimental values of momentum transfer cross-sections have been used for electron collisions with N2, O2 and Ar and theoretical values for N, O, He and H. It is observed that the electron-ion collisions dominate over the electron-neutral collisions above 170 km. The temporal, seasonal and solar epoch variations of electron-ion collisions are also shown. A typical electron collision frequency profile corresponding to the exospheric temperature of 1100 K has been compared with the available experimental results for D, E and F-regions obtained from different experimental techniques. This profile has been used to determine the electrical, thermal, heat flow and current flow conductivities, the mobility and the diffusivity of electrons.
Aggarwal Kanti M.
Nath Nitya
Setty S. G. K. C.
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