High frequency radar observations of horizontal plasma waves in the equatorial ionosphere

Details High frequency radar observations of horizontal plasma waves in the equatorial ionosphere High frequency radar observations of horizontal plasma waves in the equatorial ionosphere

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.277..203c&link_type=abstract

Nature, vol. 277, Jan. 18, 1979, p. 203, 204.

Computer Science

Sound

Equatorial Electrojet, High Frequencies, Ionospheric Sounding, Magnetohydrodynamic Stability, Plasma Waves, Radar Measurement, E Region, Ionospheric Propagation, Phase Velocity, Radar Echoes, Spectrum Analysis

Scientific paper

Coherent HF radar returns from electron-density irregularities embedded in the equatorial electrojet have been used to measure electric fields in the equatorial ionosphere and study plasma instabilities at the origin of the irregularities. It is shown that strong anomalous reversals of the equatorial electrojet are sometimes observed and that quasi-horizontal plasma waves have been detected during such an event. The experimental results are considered in the light of ray tracing of radio-wave propagation for the conditions prevailing in the E layer at the time of the observations.

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