Composition of 1–128 keV Magnetospheric ENAs

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Abstract

The Two Wide-angle Imaging Neutral-atom Spectrometers (TWINS) mission has observed the inner magnetosphere since 2008. TWINS flies energetic neutral atom (ENA) cameras aboard two spacecraft in separate Molniya orbits. TWINS images the ENA emissions from the inner magnetosphere across a broad range of energies (1 to 128 keV for H, 16 to 128 keV for O, and higher energies for total ENAs). This allows TWINS to observe the evolution, on minute timescales, of the trapped and precipitating particles that dominate storm time dynamics. Presented here are ENA observations over this broad energy range of the large storm of 17 March 2015 (Dst

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Valek, P. W., Delmonico, E., McComas, D. J., Goldstein, J., Allegrini, F., & Livi, S. (2018). Composition of 1–128 keV Magnetospheric ENAs. Journal of Geophysical Research: Space Physics, 123(4), 2668–2678. https://doi.org/10.1002/2017JA024997

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