Large-scale irregularities of electron concentration in the southern magnetic anomaly area according to Intercosmos 19 satellite data

Details Large-scale irregularities of electron concentration in the southern magnetic anomaly area according to Intercosmos 19 satellite data Large-scale irregularities of electron concentration in the southern magnetic anomaly area according to Intercosmos 19 satellite data

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jatp...54..173f&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 54, Feb. 1992, p. 173-178.

Computer Science

Sound

1

Geomagnetism, Ionospheric Electron Density, Ionospheric Propagation, Magnetic Anomalies, Radio Waves, Satellite Sounding, Daytime, Ionograms, Ionospheric Sounding, Southern Hemisphere, Space-Time Functions, Winter

Scientific paper

Using Intercosmos 19 satellite topside sounding data, a type of complex ionogram for which the lowest frequency of the radio-wave which has pased through the ionosphere is smaller than the greatest frequency of the radio-wave reflected from the ionosphere is considered. (Under normal conditions these frequencies are identically equal). A mechanism is suggested by which radio-waves transmitted by the satellite propagate over 3000 km in the topside ionosphere in the presence of inclined large-scale plasma structure, which can explain the main features of such ionograms. The space-time distribution of this phenomenon on a global scale is analyzed. It is shown that it manifests itself mainly in the local winter, in the daytime and in the Southern Hemisphere. It is hypothesized that these large-scale irregularities are formed in the vicinity of the South Atlantic magnetic anomaly, and then move westward.

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