Nitric oxide concentration near the mesopause as deduced from ionospheric absorption measurements期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Nitric oxide concentration near the mesopause as deduced from ionospheric absorption measurements

Authors:	J La?tovi?ka

Institution:	(1) Geophysical Institute, Czechoslovak Academy of Sciences, Boni II, 141 31 Prague 4, Czechoslovakia

Abstract:	Nitric oxide concentration in the upper D-region is estimated by comparing empirically derived ratios of Lyman- and X-ray contributions to the total radio-wave absorption (2775 kHz. A3 method) in medium latitudes with model ratios. Typical NO concentrations are about 8.5×10¹³ m^–3, at 90 km and 6.5×10¹³ m^–3 at 78 km. These values are higher than generally accepted model NO concentrations, but lie within the broad range of experimental values.

Keywords:	NO concentration Ionospheric implications of A3 absorption
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