Physics
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jatp...49...19b&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 49, Jan. 1987, p. 19-25. Research supported by the Univers
Physics
2
Earth Ionosphere, Equatorial Atmosphere, Geomagnetism, Ionospheric Disturbances, Magnetic Disturbances, Spread F, Height, Radar Measurement, Sunset
Scientific paper
Tabulations of AE indices at 2-h intervals are used to study spread-F and h'F variations relative to levels of geomagnetic activity in a sunspot-minimum period for three stations in equatorial latitudes. Results for the premidnight period show both the suppression of spread-F occurrence at delay times corresponding to enhanced geomagnetic activity at local times of 1800 and 1200, and the suppression of h'F at times of spread-F suppression. Results for the postmidnight period suggest that height rises are closely related to enhanced geomagnetic activity a few hours earlier, and show the occurrence of associated enhanced spread-F.
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