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

Journal Article · Sun Nov 01 04:00:00 EST 1992 · Journal of Geophysical Research

DOI:https://doi.org/10.1029/92JA01531· OSTI ID:166723

Dalkir, Y R; Lee, M C ^[1]; Groves, K M ^[2]; Kuo, S P ^[3]

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1. Massachusetts Institute of Technology, Cambridge, MA (United States)
2. Phillips Lab., Hanscom Air Force Base, MA (United States)
3. Polytechnic Univ., Farmingdale, NY (United States)

A low-frequency ({approximately}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{degrees}N, 135{degrees}E). These observations are examined and interpreted with an alternative mechanism based on the theory of Lee and Kuo. 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. 9 refs., 1 fig.

• Sponsoring Organization: USDOE
• OSTI ID: 166723
• Journal Information: Journal of Geophysical Research, Journal Name: Journal of Geophysical Research Journal Issue: A11 Vol. 97; ISSN JGREA2; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DOPPLER EFFECT
IONOSPHERE
LONG WAVE RADIATION
MODE CONVERSION
SATELLITES
WAVE PROPAGATION