Aspect angle dependence of mean Doppler velocities of 1-m auroral plasma waves

Details Aspect angle dependence of mean Doppler velocities of 1-m auroral plasma waves Aspect angle dependence of mean Doppler velocities of 1-m auroral plasma waves

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9110173n&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Sept. 1, 1986, p. 10173-10177.

Physics

25

Auroral Zones, E Region, Plasma Waves, Collision Rates, Electric Fields, Magnetohydrodynamic Stability, Phase Velocity, Plasma Drift

Scientific paper

The mean phase velocity of 1-m unstable plasma waves, excited by the two-stream instability in the auroral E region, has been measured as a function of aspect angle. The normalized function is consistent with the predicted variation of the phase velocity at threshold of the instability. To reconcile the observations with theoretical predictions of the functional relationship for excitation far beyond threshold, an effective electron collision frequency six times the electron-neutral collision frequency is required.

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