Very large phase velocities of non two-stream, meter scale irregularities in the high latitude E region ionosphere

Details Very large phase velocities of non two-stream, meter scale irregularities in the high latitude E region ionosphere Very large phase velocities of non two-stream, meter scale irregularities in the high latitude E region ionosphere

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9413489h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Oct. 1, 1989, p. 13489-13504.

Computer Science

Sound

10

Arctic Regions, E Region, Ionospheric Sounding, Phase Velocity, Radio Auroras, Auroral Electrojets, Magnetic Signatures, Power Spectra, Radar Echoes, Velocity Distribution

Scientific paper

This paper presents experimental evidence, obtained by the Scandinavian Twin Auroral Radar Experiment radars, for a new category of meter-scale-wavelength radio auroral irregularities in the high-latitude E region ionosphere, characterized by a unique Doppler spectrum signature. These echoes were detected only with the Finland radar which observes at large angles to the electrojet flow. The new spectrum, named type 5, is composed of three main frequency bands, two being symmetric about zero Doppler shift near +/- 450 m/sec and a third being centered near 1000 m/sec, resulting in a characteristic asymmetry of the spectrum. The Doppler polarity of the large phase velocity component is always at negative shifts in the eastward electrojet and at positive shifts in the westward electrojet.

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