Physics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988rasc...23..389s&link_type=abstract
Radio Science (ISSN 0048-6604), vol. 23, May-June 1988, p. 389-399.
Physics
3
Atmospheric Conductivity, Charged Particles, Galactic Cosmic Rays, Ion Concentration, Ionic Mobility, Middle Atmosphere, Aerosols, Electron Density (Concentration), Mass Spectroscopy
Scientific paper
Mean ionic mass and conductivity, the product of mobility and ion concentration, are important in calculations of low-frequency propagation. Progress made mostly over the last decade concerning these parameters is reviewed. The mean positive ion mass has a range of about 90 + or - 35 amu with lighter masses more prevalent at the higher altitudes. The mean negative ion mass is generally greater and reaches a peak value of 300 amu near 35 km. Reduced mobilities for both positive and negative ions appear to lie within 1.6 + or - 0.6 sq cm/Vs. Somewhat finer resolution of mobilities with altitude is tabulated in the text. It is argued that ion concentrations and hence total conductivities are easily and well defined where galactic cosmic rays are the dominant ionization source and electron concentrations are negligible.
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