Physics
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3219103k&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 19, CiteID L19103
Physics
33
Ionosphere: Ionosphere/Atmosphere Interactions (0335), Atmospheric Processes: Atmospheric Electricity, Atmospheric Processes: Middle Atmosphere Dynamics (0341, 0342)
Scientific paper
Electron energies and the strength of electric fields in sprites are deduced for five selected events, which were recorded by the space-borne instrument called ISUAL (Imager of Sprites and Upper Atmospheric Lightning; a payload on the FORMOSAT-2 satellite). From the derived peak intensity ratios of spectrophotometer channel 2 (centered at 337 nm) and channel 3 (centered at 391.4 nm) of these sprites, the average and characteristic electron energies were found to be in the range of 6.2-9.2 eV and 4.5-6.5 eV, respectively. The estimated E/N at 40-60 km is 243-443 Td and the strength of the electric field is 2.1-3.7 times that of the atmosphere breakdown E-field at these altitudes. The inferred electron energies and the strength of electric fields are about two times higher than those inferred from ground campaigns. However, they are consistent with the prediction of the sprite streamer model.
Chen Alfred B.
Frey Harald U.
Fukunishi Hiroshi
Hsu Rue-Ron
Kuo Cheng-Ling
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