HF radar observations of E region plasma irregularities produced by oblique electron streaming

Details HF radar observations of E region plasma irregularities produced by oblique electron streaming HF radar observations of E region plasma irregularities produced by oblique electron streaming

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9212327v&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Nov. 1, 1987, p. 12327-12342. USAF-DNA-supported research.

Computer Science

Sound

76

E Region, Ionospheric Sounding, Radio Probing, Space Plasmas, Decametric Waves, Electrons, Ion Acoustic Waves, Propagation Velocity, Radar Measurement, Signal Processing, Signal To Noise Ratios

Scientific paper

Data obtained with an HF radar located in Goose Bay, Labrador, were used to study four selected events which occurred in September and October of 1985 and September 1986 in the postmidnight sector at E region altitudes and which exhibited unusual but similar characteristics. The radar data indicated that arclike regions of irregularities were moving approximately along L contours, with a drift velocity of the order of 200 m/s or less. For periods of a few minutes or less, localized regions of irregularities exhibiting high Doppler velocities appeared within the radar arcs. Two distinct types of high Doppler-velocity signals were identified: one type, distributed between 320 and 550 m/s, interpreted as ion acoustic velocity; and the other, distributed between 320 and 550 m/s, interpreted as electrostatic ion cyclotron waves produced by NO(+) ions.

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