Physics
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30rssc7i&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 18, pp. SSC 7-1, CiteID 1945, DOI 10.1029/2003GL017573
Physics
12
Ionosphere: Equatorial Ionosphere, Atmospheric Composition And Structure: Airglow And Aurora, Ionosphere: Ionospheric Dynamics, Atmospheric Composition And Structure: Instruments And Techniques, Ionosphere: Ionospheric Irregularities
Scientific paper
Thousands of images of the nighttime equatorial airglow arcs have been obtained by the Far-Ultraviolet Imager (FUV) on-board the NASA IMAGE satellite. Imaging periods lasting several hours around the time of satellite apogee allow for the determination of the velocity of drifting plasma density depletions occurring within the airglow arcs. These velocities reflect the E × B drift of low-latitude plasma under the influence of a vertical electric field. A survey of several weeks of data produces information regarding the variation of drift speeds with solar 10.7-cm radio flux. Comparisons to previous measurements by the Jicamarca radar show that the FUV-determined plasma drift speeds are 10-35% greater, particularly before 2100 local time. This difference is attributed mainly to the different magnetic latitudes of the observations.
Frey Harald U.
Immel Thomas J.
Mende Stephen B.
Peticolas Laura M.
Sagawa Eiichi
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