Double-peaked electrostatic ion cyclotron harmonic waves

Details Double-peaked electrostatic ion cyclotron harmonic waves Double-peaked electrostatic ion cyclotron harmonic waves

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9510591b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, July 1, 1990, p. 10591-10598.

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2

Auroras, Electric Fields, Electrostatic Waves, Harmonic Radiation, Ion Cyclotron Radiation, Dynamics Explorer 1 Satellite, Hydrogen Ions, Ion Concentration, Phase Velocity, Wavelengths

Scientific paper

Electrostatic H(+) cyclotron harmonic waves are often observed along the auroral field lines at altitudes of 1-3.5 R(E) by the Dynamics Explorer 1 satellite. A small fraction of these waves are found to have two peaks associated with each harmonic instead of one peak. The waves occur below the lower hybrid frequency and are usually relatively weak, about a factor of 4 smaller than typical electric field amplitudes of other H(+) cyclotron harmonic wave events. The double-peaked spectral signature is believed to be produced by Doppler shifts arising from the satellite velocity relative to the plasma rest frame. The waves were found to have wavelengths of the order of 300 m and phase velocities of the order of 150 km/s.

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