Vertical structure of the VHF backscattering region in the equatorial electrojet and the gradient drift instability

Details Vertical structure of the VHF backscattering region in the equatorial electrojet and the gradient drift instability Vertical structure of the VHF backscattering region in the equatorial electrojet and the gradient drift instability

Apr 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.1313f&link_type=abstract

Journal of Geophysical Research, vol. 80, Apr. 1, 1975, p. 1313-1324.

Physics

39

Backscattering, Electron Density Profiles, Equatorial Electrojet, Ionospheric Electron Density, Radar Measurement, Very High Frequencies, Doppler Effect, Drift Rate, Electron Energy, Frequency Shift, Ionospheric Drift, Night Sky, Phase Velocity, Power Spectra, Radar Echoes, Vertical Distribution

Scientific paper

Radar measurements made with high spatial resolution and large dynamic range at the Jicamarca Radar Observatory near the time of reversal of the electrojet current provide further proof that the gradient drift instability is in fact responsible for the type 2 irregularities. Echoes are received over a much wider range of altitudes at night than during the day partly because of the change in character of the background electron-density profile and partly because of recombination effects, which can be important during the day. It is also shown that one must be cautious, particularly at night, in associating the mean Doppler shift of oblique radar echoes with the maximum east-west electron drift velocity.

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