Physics
Scientific paper
Aug 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jastp..64.1413d&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 64, Issue 12-14, p. 1413-1423.
Physics
4
Scientific paper
In this paper, the ionospheric electron content (IEC) profile features, have been utilized for extraction of a few parameters and the parameters are used for assertion of a certain day as quiet (Q) or disturbed (D). The IEC values taken for the study cover two solar activity periods (high and low) and are based on VHF RB data collected over Guwahati /(26.2°N, /91.75°E). The paper describes methods for extraction of parameters like profile factor, /P and anomaly factor, PEA from IEC profiles separately for three seasons (summer, winter and equinox). The definitions of Q and D days are made through profile features and the threshold values of ΣKp for each season are evaluated. The relations between ΣKp and /P factor, ΣKp and PEA are established after corrections for solar activity condition. The prediction and assertion of Q/D days are then made by examining IEC profiles for the cases where IEC data were not used for the parameter extraction.
Barbara Ananda Kumar
Barman M. K.
Devi Minakshi
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