Physics
Scientific paper
Jan 1968
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968jatp...30...85t&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 30, no. 1, pp. 85-98
Physics
1
Scientific paper
14 transits of the satellites S-66 have been recorded at Scott Base (78°S, 167°E) each day since October 1964. The records are scaled to determine the degree of irregularity of the ionosphere at intervals of 0.2 min throughout each transit. By combining the results from 3000 separate transits the mean degree of irregularity of the antarctic ionosphere has been mapped over a large area including the geographic, geomagnetic and dip poles and extending across the auroral zone. Intense field aligned irregularities were observed for 65 per cent of the time in both winter and summer. The area between the geographic and geomagnetic poles was consistently irregular in both seasons. A weaker irregular region extended along the line L = 20 to include the dip pole. There was a slight increase in the density of irregularities at all points in winter, so that the percentage fluctuations in electron density were twice as large in winter as in summer. A narrow disturbed region at 170°E in winter coincided with a region of increased f0F2. The ionosphere was generally smoother away from the poles, and there was no disturbed region associated with the auroral zone.
Stuart G. F.
Titheridge J. E.
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