Physics
Scientific paper
Jul 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.2866d&link_type=abstract
Journal of Geophysical Research, vol. 80, July 1, 1975, p. 2866-2868.
Physics
2
E Region, Interplanetary Magnetic Fields, Ionograms, Ionospheric Disturbances, Polar Caps, Solar Wind, Histograms, Magnetic Field Configurations, Polarity, Satellite Observation
Scientific paper
The 'slant E condition' (SEC) in polar cap ionograms has been shown previously to indicate excitation of the Farley-Buneman instability in the E region. The SEC at Godhavn (Greenland) is shown here to correlate with the solar wind sector structure, the occurrence rate of SEC being large a few days after passage of a sector boundary and declining in the trailing part of the sector. Analysis of SEC occurrence in terms of the solar wind velocity measured on board Heos 2 indicates that no SEC occurs when solar wind velocity is less than 350-400 km/sec (in apparent agreement with the interpretation of SEC in terms of the Farley-Buneman instability).
Dangelo N.
Olesen Jens K.
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