Computer Science
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992p%26ss...40...95s&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 40, Jan. 1992, p. 95-103.
Computer Science
18
Electric Fields, Ionospheric Disturbances, Magnetic Storms, Polar Substorms, Equatorial Atmosphere, F Region, Radar Scattering
Scientific paper
Results are presented of a study of h-prime F data derived from interval ionograms recorded on the night of August 29-30, 1957 at Kodaikanal (10 deg 14 min N, 77 deg 29 min E, geomag. lat. 0.6 deg N) during a geomagnetic storm revealed clear-cut evidence for the occurrence of a transient electric field perturbation of a composite nature during a substorm, which occurred in the midnight-dawn period on that date. The perturbation is characterized by a sudden decrease in h-prime F, followed by a prominent increase over a 3-hr period. The decrease in h-prime F occurred around the onset of the substorm, and the subsequent increase took place during the substorm recovery phase. The observed F-region height disturbance is interpreted as a signature of a transient composite disturbance in the equatorial zonal electric field caused by the prompt penetration of high-latitude electric fields into the equatorial ionosphere.
Hanumath Sastri J.
Karunakaran D.
Ramesh K. B.
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