Physics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jatp...46..635v&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 46, June-July 1984, p. 635-641.
Physics
54
Arctic Regions, Auroral Zones, Eiscat Radar System (Europe), Radar Measurement, Space Plasmas, Convective Flow, Daytime, Drift Rate, Flow Velocity
Scientific paper
The potential of the EISCAT radar system for observing plasma convection patterns at high latitudes has been explored in a preliminary experiment on November 1982. Using a beamswinging technique, plasma velocity was measured at slant ranges of 645-1170 km, enabling velocity vectors to be derived for invariant latitudes 70-77 deg. Although operational problems limited the experiment to 80 min, some interesting observations of high-latitude flows were made. Typical afternoon westward flows of about 1 km/s were recorded over much of the interval, but important temporal and spatial variations were also seen as a result of the good time and space resolution of the experiment (5 min and 75 km, respectively). In particular, the westward flow was interrupted for about 10 min by a surge of poleward flow, possibly related to dynamic coupling occurring at the dayside magnetopause, such as a flux-transfer event.
Cowley Stan W. H.
Rishbeth Henry
van Eyken Anthony P.
Willis David M.
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