A rocket-borne radar study of aurora

Physics

Scientific paper

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Coherent Radar, Ion Acoustic Waves, Pulse Radar, Radio Auroras, Rocket-Borne Instruments, Magnetohydrodynamic Stability, Plasma-Electromagnetic Interaction, Polar Regions, Radio Scattering

Scientific paper

A coherent-pulse auroral radar was flown in a Black Brant VI rocket from the Churchill Research Range in February 1978, into a moderate radio-auroral event. The characteristic Doppler spectrum of ion-acoustic waves was present in the scattered signal over much of the useful part of the flight. The derived value of the ion-acoustic wave speed for this event is 380 m/s. The results indicate that the technique can be used to detect the Farley-Buneman instability in the auroral plasma or, presumably, in the polar ionosphere but in order to add significantly to present knowledge of the scattering mechanism a higher performance rocket should be used.

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