Computer Science – Sound
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..16..139g&link_type=abstract
Advances in Space Research (ISSN 0273-1177), vol. 16, no. 1, p. (1)139-(1)142
Computer Science
Sound
2
Comparison, Data Correlation, Electron Density Profiles, F 2 Region, Indexes (Documentation), Ionospheric Disturbances, Annual Variations, Critical Frequencies, Diurnal Variations, Eiscat Radar System (Europe), Ionosondes, Ionospheric Sounding, Statistical Analysis
Scientific paper
With data of the northern Scaninavian ionosonde stations hourly, 3-h, daily and monthly indices a catalog of ionospheric disturbance or quietness have been derived for 1981 to 1993. More than 5000 European Incoherent Scatter (EISCAT) electron density height profiles have been analyzed independetly to measure the F region peak disturbance or quietness regarding the ionosonde derived monthly meta-median. The diurnal mean percentage deviation of EISCAT results is compared to ionospheric and geomagnetic quiet, disturbed and neutral days. Such ionospheric and geomagentic state coincides for 30% of the days. 3-h ionospheric disturbance indices illustrate negative ionospheric storm when the auroral electrojet indices are greater than 500 nT.
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