On the relative abundance of helium ions in the topside ionosphere |
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| Authors: | R Koleva IS Kutiev |
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| Institution: | Central Laboratory for Space Research at the Bulgarian Academy of Sciences, 6 Moskovska Str., Sofia 1300, Bulgaria |
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| Abstract: | Based on data from satellite INTERCOSMOS-BULGARIA-1300, the latitudinal distribution of oxygen and helium ions in the topside ionosphere is discussed for night-time equinox at high solar activity. A comparison with the corresponding IRI-79 distribution is made. The vertical IRI ion composition profile is checked with measurements made with VERTICAL-10 rocket. Some recommendations are made in order to improve the IRI-modelling of the ion composition in the topside ionosphere. |
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