Excitation of artificial airglow by high power radio waves from the 'SURA' ionospheric heating facility

Details Excitation of artificial airglow by high power radio waves from the 'SURA' ionospheric heating facility Excitation of artificial airglow by high power radio waves from the 'SURA' ionospheric heating facility

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1477b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Aug. 1991, p. 1477-1480. Research supported by U.S. Navy.

Physics

31

Airglow, F Region, Ionospheric Heating, Plasma-Electromagnetic Interaction, Radio Waves, Wave Generation, Antenna Arrays, Antenna Radiation Patterns, Electron Acceleration, Magnetic Field Configurations, Radio Transmission

Scientific paper

The present study considers low-light-level optical measurements made in September 1990 at a Soviet facility for generation of high power radio waves. Images of enhanced red-line (630-nm) emissions were recorded during radio wave transmissions. The antenna radiation pattern, ionospheric irregularities, and the magnetic field orientation affected the shape of the observed airglow structures. The airglow clouds drifted across the night sky, disappeared, and reformed at the zenith of the antenna array. This was interpreted in terms of radio beam refraction in drifting plasma irregularities and bifurcation when the beam is split between two density cavities. It is concluded that given clear skies, the low-light-level imaging technique is a reliable method for studying large-scale irregularities and electron acceleration with high-power HF transmitting facilities.

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