F1 Region Ion Composition in Svalbard During the International Polar Year 2007–2008
Ilkka I. Virtanen,
Habtamu W. Tesfaw,
Anita T. Aikio
et al.
Abstract:Ions in the F region ionosphere at 150–400 km altitude consist mainly of molecular NO+ and , and atomic O+. Incoherent scatter (IS) radars are sensitive to the molecular‐to‐atomic ion density ratio, but its effect to the observed incoherent scatter spectra is almost identical with that of the ion temperature. It is thus very difficult to fit both the ion temperature and the fraction of O+ ions to the observed spectra. In this paper, we introduce a novel combination of Bayesian filtering, smoothness priors, and… Show more
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