First Simultaneous Observation of STEVE and SAR Arc Combining Data From Citizen Scientists, 630.0 nm All‐Sky Images, and Satellites
Abstract
On September 28, 2017 citizen scientist observations at Alberta, Canada (51°N, 113° W) detected aurora and a thin east‐west purplish arc, known as strong thermal emission velocity enhancement (STEVE) that lasted less than 20 min. All‐sky imagers at subauroral latitudes measured stable auroral red (SAR) arcs during the entire night. The imager at Bridger, MT (45.3°N, 108.9°W) also measured a STEVE. The overlapping geometry allowed to determine that the height of STEVE was 225–275 km. STEVE is brighter in the 630.0 nm images in the West and almost merges with the SAR arc in the East. A DMSP satellite pass in the southern hemisphere was at the conjugate location of the Bridger imager during the STEVE observation. When mapped into the northern hemisphere intense subauroral ion drift and subauroral polarization streams were detected associated with the two optical signatures measured in 630.0 nm.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 24, 2021
- Source ID
- 10.1029/2020gl092169
Entities
People
- Alan Dyer
- Asti Bhatt
- Bea Gallardo-Lacourt
- Carlos Martinis
- J. Wroten
- John R. Baumgardner
- Yukitoshi Nishimura
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory
- Ames National Laboratory
- Boston University
- National Aeronautics and Space Administration
- National Science Foundation
- SRI International