"31" . "Bilitza, D." . "P(GP205/02/P037), P(IAB3042104), P(KSK3012103), Z(AV0Z3042911)" . "satellite data; ion density; solar activity"@en . . . "\u0160milauer, Jan" . . "The IRI standard model of relative ion composition assumes a constant n(H+)/n(He+) ratio of 9. We study the light ion ratio with Atmosphere Explorer C (AE-C) and ACTIVE satellite data for low and high solar activity. Based on the AE-C data a model is presented that described the light ion ratio in terms of latitude for day and night conditions."@en . . . "RIV/68378289:_____/03:04033516" . "3"^^ . . . "4"^^ . "0"^^ . . "0"^^ . . . "T\u0159\u00EDskov\u00E1, Ludmila" . "3" . "The IRI standard model of relative ion composition assumes a constant n(H+)/n(He+) ratio of 9. We study the light ion ratio with Atmosphere Explorer C (AE-C) and ACTIVE satellite data for low and high solar activity. Based on the AE-C data a model is presented that described the light ion ratio in terms of latitude for day and night conditions." . "RIV/68378289:_____/03:04033516!RIV/2004/AV0/A04004/N" . "Model of the N(H+)/N(He+) ratio for IRI." . "615791" . . "[B124CE9C3143]" . . "4"^^ . "677;680" . . . "Model of the N(H+)/N(He+) ratio for IRI."@en . "Model of the N(H+)/N(He+) ratio for IRI." . "Truhl\u00EDk, Vladim\u00EDr" . . . . . . "Model of the N(H+)/N(He+) ratio for IRI."@en . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . "Advances in space research" . . "0273-1177" . .