Physics
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996angeo..14.1060h&link_type=abstract
Annales Geophysicae, vol. 14, Issue 10, pp.1060-1065
Physics
2
Scientific paper
It is shown that swept-frequency backscatter ionograms covering a range of azimuths can be used to study the dynamics of sporadic-E clouds. A simple technique based on analytic ray tracing can be used to simulate the observed narrow traces associated with Es patches. This enables the location and extent of the sporadic-E clouds to be determined. The motion of clouds can then be determined from a time sequence of records. In order to demonstrate the method, results are presented from an initial study of 5 days of backscatter ionograms from the Jindalee Stage B data base obtained during March-April 1990. Usually 2-3 clouds were observed each day, mainly during the evening and up to midnight. The clouds lasted from 1-4 h and extended between 30°-80° in azimuth and 150-800 km in range. The clouds were mostly stationary or drifted generally westward with velocities of up to 80 m s-1. Only one cloud was observed moving eastward.
Bennett Anthony. J.
Dyson Peter L.
Houminer Zwi
Russell Christian J.
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