Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 46, Issue 12, Pages 6279-6286Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2019GL082687
Keywords
ionosphere; Swarm satellites; SAID; Steve
Categories
Funding
- European Space Agency
- Natural Sciences and Engineering Council of Canada
- Canadian Space Agency
- National Science Foundation
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Little is currently known about the optical phenomenon known as Steve. The first scientific publication on the subject suggests that Steve is associated with an intense subauroral ion drift (SAID). However, additional inquiry is warranted as this suggested relationship as it is based on a single case study. Here we present eight occurrences of Steve with coincident or near-coincident measurements from the European Space Agency's Swarm satellites and show that Steve is consistently associated with SAID. When satellite observations coincident with Steve are compared to that of typical SAID, we find the SAID associated with Steve to have above average peak ion velocities and electron temperatures, as well as extremely low plasma densities.
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