Physics
Scientific paper
Dec 1967
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967jatp...29.1581u&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 29, no. 12, pp. 1581-1593
Physics
1
Scientific paper
A statistical analysis of the radial movement of auroral echoes in a direction 30°E of local magnetic south, observed at 55 Mc/s from Bluff in 1958, is presented. The mean geomagnetic time of changeover from negative (toward the radar) to positive directions of radial movement occurs earlier at greater ranges from the radar, that is at higher latitudes, but is independent of the level of magnetic disturbance. Mean negative radial velocities are independent of the level of disturbance; mean positive radial velocities are strongly correlated. If the radial velocities looking along two directions are interpreted as components of a horizontal velocity in the echo region there is a difference of approximately 90° between the direction of movement and the direction of the horizontal magnetic disturbance vector under the echo region during the evening and early morning, but poor agreement between their magnitudes, except occasionally in the early morning. The results are in generally good agreement with previously published data from similar latitudes.
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