A mechanism responsible for the observation of symmetric lower hybrid sidebands and a low frequency mode in the upper ionosphere

Details A mechanism responsible for the observation of symmetric lower hybrid sidebands and a low frequency mode in the upper ionosphere A mechanism responsible for the observation of symmetric lower hybrid sidebands and a low frequency mode in the upper ionosphere

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9717195d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A11, p. 17,195-17,198.

Physics

1

Plasma Frequencies, Plasma Waves, Sidebands, Upper Ionosphere, Very Low Frequencies, Electrostatics, Geomagnetism, Wave Propagation, Whistlers

Scientific paper

A low-frequency (about 500 Hz) mode in conjunction with symmetric sidebands, displaced by approximately 500 Hz off the carrier frequencies of 11.90 and 12.65 kHz, has been observed in experiments conducted with the Aureol 3 satellite at altitudes of 1200 km above the Komsomolsk-on-Amur Alpha Station (50 deg N, 135 deg E) (Sotnikov et al., 1991 and references therein). These observations are examined and interpreted with an alternative mechanism based on the theory of Lee and Kuo (1984). The proposed mechanism suggests that the injected VLF wave parametrically excites a purely growing mode and both the Stokes and anti-Stokes sidebands of the lower hybrid waves. The Doppler-shifted frequencies of these modes resulting from the satellite motion adequately account for both the sidebands and the low-frequency mode observed in the Aureol 3 experiments.

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