A review on radio studies of auroral E-region ionospheric irregularities

Details A review on radio studies of auroral E-region ionospheric irregularities A review on radio studies of auroral E-region ionospheric irregularities

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989angeo...7..239h&link_type=abstract

Annales Geophysicae (ISSN 0980-8752), vol. 7, June 1989, p. 239-258.

Computer Science

Sound

117

Auroral Zones, E Region, Ionospheric Disturbances, Ionospheric Sounding, Radar Measurement, Electrojets, Interferometry, Magnetohydrodynamic Stability, Radar Echoes, Radar Scattering, Scattering Cross Sections, Ultrahigh Frequencies, Very High Frequencies

Scientific paper

The physical significance of recent radar studies of auroral irregularities at different frequency bands in the VHF and UHF range is discussed, with emphasis on Doppler spectral studies. The results suggest that important differences exist between the 50-MHz equatorial and auroral backscatter processes, and that the role of altitude and of electron density in the generation and saturation of instabilities is much more important in the auroral than in the equatorial E region. The need for a general unified theory of radio aurora incorporating wave energy propagation characteristics and new nonlinear saturation mechanisms is emphasized.

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