On a method of extended observations of the spectrum of plasma instabilities in the electrojet

Details On a method of extended observations of the spectrum of plasma instabilities in the electrojet On a method of extended observations of the spectrum of plasma instabilities in the electrojet

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jatp...43..829c&link_type=abstract

(International Symposium on Equatorial Astronomy - II, 6th, Aguadilla, PR, July 17-23, 1980.) Journal of Atmospheric and Terrest

Astronomy and Astrophysics

Astronomy

1

Equatorial Electrojet, F Region, Ionospheric Electron Density, Magnetohydrodynamic Stability, Plasma Spectra, Backscattering, Doppler Effect, Power Spectra, Radar Measurement, Ray Tracing

Scientific paper

Because past investigations of the equatorial electrojet with backscatter radars have limited K spectrum studies to oblique angles at different locations and relatively short wavelengths, a method has been devised which employs only one station but takes advantage of the radio rays' reflections from the F-layer and the ground surface. Different wave vectors K can be detected at the same location in the instability layer, using backscatter and forwardscatter propagations, and the K spectrum investigation can be extended to horizontal and long wavelength instabilities. The wavenumber spectrum can be explored even at very long wavelengths, to about 100 m, using only one HF radar frequency through forwardscatter mode exploration. Experimental results obtained in Ethiopia at 7.25 and 14.2 MHz are presented, and several modes are identified in agreement with the method's predictions.

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