GUVI Biblio




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The first coordinated ground- and space-based optical observations of equatorial plasma bubbles



AuthorKelley, Michael; Makela, J.; Paxton, L.; Kamalabadi, F.; Comberiate, J.; Kil, H.;
Keywords
Abstract

We report on ionospheric optical emissions detected by the GUVI instrument on the TIMED satellite. As the satellite crosses the equatorial zone the bright Appleton Anomaly region is imaged. Often these bright zones are interrupted by regions slanted from west to east as the equator is approached forming a backwards \textquoteleftC\textquoteright-shape in the image. To explain this feature we use simultaneous ground-based observations looking equatorward from Hawaii using the 777.4-nm emission. We also compare these optical observations to inverted electron density maps, as well as to those made by radar and to numerical simulations of the Rayleigh-Taylor instability. The characteristic shape is a result of a shear in the eastward plasma flow velocity, which peaks near the F peak at the equator and decreases both above and below that height. The ability to detect these unstable and usually turbulent ionospheric regions from orbit provides a powerful global remote sensing capability for an important space weather process.

Year of Publication2003
JournalGeophysical Research Letters
Volume30
Number of Pages
Section
Date Published07/2003
ISBN
URLhttp://doi.wiley.com/10.1029/2003GL017301
DOI10.1029/2003GL017301