Ionospheric ion cyclotron wave generation inferred from coordinated Doppler radar, optical, and magnetic observations

Details Ionospheric ion cyclotron wave generation inferred from coordinated Doppler radar, optical, and magnetic observations Ionospheric ion cyclotron wave generation inferred from coordinated Doppler radar, optical, and magnetic observations

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.3315p&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, April 1, 1987, p. 3315-3331. NSERC-supported research.

Physics

16

E Region, Ion Cyclotron Radiation, Ionospheric Ion Density, Nitrogen Ions, Oxygen Ions, Plasma Drift, Equatorial Electrojet, Gyrofrequency, Magnetic Signatures, Plasma Waves

Scientific paper

Doppler spectra obtained with two cross-beamed 50-MHz CW radio systems often showed narrow peaks near the gyrofrequencies of the principal ions in the E region, N2(+), NO(+), O2(+), and O(+), strongly suggesting the existence of electrostatic ion cyclotron waves during auroral conditions. At times when strong ion cyclotron peaks were observed by the radar, all-sky pictures of the scattering region showed rays and coronas. There was a good correlation between the occurrence of the ion cyclotron type spectra and the E-W magnetic perturbation. A close relationship was found between average plasma drifts inferred from the radar Doppler spectra and north-south motions of optical auroral forms.

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