Computer Science – Sound
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15...45r&link_type=abstract
Advances in Space Research (ISSN 0273-1177), vol. 15, no. 2, p. 45-50
Computer Science
Sound
1
Diurnal Variations, F 2 Region, Geomagnetism, Ionospheric Sounding, Solar Activity, Solar Terrestrial Interactions, Variability, Ionosondes, Meteosat Satellite
Scientific paper
We made a critical study of ionospheric variability using hourly values data of different characteristics from nine ionospheric stations in the northern hemisphere for one year of high solar activity, considering: (a) 'typical' diurnal variation and median trend; (b) ionospheric quietness; (c) variability versus solar and geomagnetic activity (differing indices); and (d) spatial correlation. We conclude that: the variability is temporally irregular; the monthly median diurnal variation is not always statistically representative of the 'typical' diurnal variation for the given month; the variability is irregularly correlated to solar activity and weakly to the Ap geomagnetic index activity; spatial correlation are quite good at distances of about 500 Km in Europe.
Figliola A.
Radicella Sandro M.
Romanelli Lilia
Zhang Man-Lian
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