Comparison between the ionospheric plasma drift and the motion of artificially induced irregularities as observed by HF backscatter radars

Details Comparison between the ionospheric plasma drift and the motion of artificially induced irregularities as observed by HF backscatter radars Comparison between the ionospheric plasma drift and the motion of artificially induced irregularities as observed by HF backscatter radars

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986angeo...4...49h&link_type=abstract

Annales Geophysicae (ISSN 0755-0685), vol. 4, Feb. 1986, p. 49-54.

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2

Ionospheric Drift, Plasma Drift, Radar Scattering, Radio Frequency Heating, Backscattering, E Region, Electric Fields, F Region, High Frequencies

Scientific paper

Theories of striation generation by powerful HF waves state that the irregularities should convect with the plasma, without propagating through the medium. This prediction has been checked by observing, with the two SAFARI radars, the backscatter from striations generated in the F-region by the HEATING facility at Tromso. The magnitude and direction of the Doppler velocity of the fluctuations is derived from the line-of-sight velocities measured by the two HF radar stations. The comparison between the electric field, derived from SAFARI, and the E-region current deduced from magnetometer data show that the magnitudes are well correlated. The directions of the velocity and this current are, however, not exactly antiparallel. Another comparison between the SAFARI F-region Doppler velocity and the E-region drift measured by STARE shows, on the average, a good agreement between the estimates. The experimental evidence therefore agrees with the theoretical suggestion that the irregularity motion should be the E x B drift.

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