O mode decay and upshifted electromagnetic emissions near cyclotron harmonics in the ionosphere

Details O mode decay and upshifted electromagnetic emissions near cyclotron harmonics in the ionosphere O mode decay and upshifted electromagnetic emissions near cyclotron harmonics in the ionosphere

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.1719t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A2, p. 1719-1723.

Physics

26

Earth Ionosphere, Electromagnetic Radiation, Bernstein Energy Principle, Field Aligned Currents

Scientific paper

Near upper hybrid resonance an 0 mode launched from a ground-based transmitter undergoes two possible parametric decay instabilities: (1) a resonance instability producing field-aligned dc density striations and an upper hybrid wave and (2) a parametric decay instability producing lower hybrid and electron Bernstein modes. A nonlinear coupling between the lower and upper hybrid waves produces 0 mode sideband radiation. The lower sideband is severely cyclotron damped, while the upper sideband is weakly damped and hence observed on the ground. This explains some of the experimental results reported from the Tromso facility.

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