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First joint in situ and global observations of the medium-energy oxygen and hydrogen in the inner magnetosphere

We present the first simultaneous observations of the in situ ions and global Energetic Neutral Atom (ENA) images of the composition-separated, medium-energy (~1\textendash50 keV) particle populations of the inner magnetosphere. The ENA emissions are mapped into L shell/magnetic local time space based on the exospheric density along the line of sight (LOS). The ENA measurement can then be scaled to determine an average ion flux along a given LOS. The in situ ion flux tends to be larger than the scaled ENAs at the same local ...

Valek, P.; Goldstein, J.; Jahn, J.-M.; McComas, D.; Spence, H.;

YEAR: 2015     DOI: 10.1002/2015JA021151

ENAs; oxygen; storms; TWINS; Van Allen Probes