Instability of the state of the night-time topside ionosphere

Details Instability of the state of the night-time topside ionosphere Instability of the state of the night-time topside ionosphere

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jastp..65..673i&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 65, Issue 6, p. 673-676.

Physics

1

Scientific paper

It is common knowledge that the night-time ionosphere at the middle and moderately high latitudes is sustained by the charged particle flux arriving from plasmasphere along magnetic field lines. The downward directed particle velocity in this flux decreases with the decreasing height. It provides a potential source for plasma instability. This should be interpreted in such a way that the initial density perturbations increase with the time, and are enhanced as they propagate in space. In this paper we have carried out investigations of topside ionosphere plasma stability on the basis of solving the dispersion equation for low-frequency waves in a weakly inhomogeneous medium. Also analysis have been made of propagation of the waves within ray approximation. Is shown, that of irregularities, extending down accrue on intensity up to heights of a maximum of layer F2, and are loss in low layers of ionosphere.

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