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The THEMIS mission aims to determine the trigger and large-scale evolution of substorms by employing five identical micro-satellites which line up along the Earth's magnetotail to track the motion of particles, plasma, and waves from one point to another and for the first time, resolve space-time ambiguities in key regions of the magnetosphere on a global scale. The primary goal of THEMIS is to elucidate...
An initial survey of distant tail energetic particle phenomena from Geotail shows that (1) energetic ions of both solar wind and ionospheric origin populate the distant tail, (2) the entry of energetic ions from the magnetosheath into the magnetotail can take place many tens of earth radii behind the Earth in a transient manner, (3) energetic molecular ions of ionospheric origin are present in the...
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