Ion composition and temperature of the ionosphere obtained from the Interkosmos-24 satellite ("Aktivnyj" Project) at the maximum of the 22nd solar activity cycle.

Details Ion composition and temperature of the ionosphere obtained from the Interkosmos-24 satellite ("Aktivnyj" Project) at the maximum of the 22nd solar activity cycle. Ion composition and temperature of the ionosphere obtained from the Interkosmos-24 satellite ("Aktivnyj" Project) at the maximum of the 22nd solar activity cycle.

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994cosre..32..189a&link_type=abstract

Cosmic Res., Vol. 32, No. 2, p. 189 - 198

Computer Science

1

Earth Ionosphere: Ion Composition, Earth Ionosphere: Solar Activity Cycles

Scientific paper

Mass-spectrometer and probe data on absolute and relative concentrations of O+, N+, H+, and He+ ions, total ion concentrations, and electron temperatures were obtained on the Interkosmos-24 satellite under quiescent geomagnetic conditions during the maximum period of the 22nd solar activity cycle. Increased concentrations and temperatures were observed during this period. In the sunlit perigee region, the O+ concentration reached (1 - 3)×106cm-3 at invariant latitudes of ±35°. Under these conditions the ion temperature Ti was 1200 - 1500K and the electron temperature was 2000 - 3000K. In the main ionospheric trough region at altitudes on the order of 1000 km, the electron temperature often increased to 6000 - 7000K; during the night it decreased by 500K. In the equatorial region, the geomagnetic anomaly is often clearly expressed with peaks in the ion concentration roughly at ±15° constant latitude. The O+-H+ transition level increased with increasing latitudes on both the dayside and the nightside. It was noted that He+ ions often exceeded H+ and O+ ions by an order of magnitude at constant latitudes above 70°.

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