A theoretical interpretation of ion composition measured on board the 'Active' satellite in the European sector during April 10−12, 1990 geomagnetic storm
Ion composition measurements on board the ACTIVE satellite during the recovery phase of a strong geomagnetic storm of 10-12 April 1990 revealed extremely high concentrations (up to 10<sup>3</sup> cm<sup>-3</sup>) of the NO<sup>+</sup>, O<sup>+</sup><...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
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| Series: | Annales Geophysicae |
| Online Access: | http://www.ann-geophys.net/13/608/1995/angeo-13-608-1995.html |
| Summary: | Ion composition measurements on board the ACTIVE satellite during the recovery phase of a strong geomagnetic storm of 10-12 April 1990 revealed extremely high concentrations (up to 10<sup>3</sup> cm<sup>-3</sup>) of the NO<sup>+</sup>, O<sup>+</sup><sub>2</sub>, N<sup>+</sup><sub>2</sub> molecular ions in the topside F2-region of the European high-latitude zone. Concentrations of O<sup>+</sup>, N<sup>+</sup>, He<sup>+</sup>, H<sup>+</sup> light ions were slightly decreased relative to prestorm quite conditions. Theoretical calculations were used to analyze the observed variations in ion concentration. Increased neutral temperature and [O<sub>2</sub>], [N<sub>2</sub>] are shown to be the main reasons for the observed ion concentration variations. |
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| ISSN: | 0992-7689 1432-0576 |