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Initial results from the IMAGE extreme ultraviolet imager

  • Bill R. Sandel
  • , Robert A. King
  • , W. T. Forrester
  • , Dennis L. Gallagher
  • , A. Lyle Broadfoot
  • , C. C. Curtis
  • University of Arizona
  • NASA Marshall Space Flight Center

Research output: Contribution to journalArticlepeer-review

191 Scopus citations

Abstract

The Extreme Ultraviolet Imager (EUV) of the IMAGE mission is providing the first global images of the He+ distribution in Earth's plasmasphere. The EUV instrument images the He+ resonance line emission at 30.4 nm at a time resolution of 10 minutes and a spatial resolution of 0.1 RE. Each image encompasses the entire plasmasphere in a single frame, to permit study of the structure and dynamics of the plasmasphere in its entirety. Here we survey several of the most striking features of the plasmasphere as seen by EUV. These features include convection tails, depleted regions that we call "voids," isolated magnetic flux tubes filled to higher He+ density than their neighbors, and "shoulders" in the He+ distribution.

Original languageEnglish
Pages (from-to)1439-1442
Number of pages4
JournalGeophysical Research Letters
Volume28
Issue number8
DOIs
StatePublished - Apr 15 2001
Externally publishedYes

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