Observations of ion cyclotron waves within the plasmasphere by Hawkeye 1

Details Observations of ion cyclotron waves within the plasmasphere by Hawkeye 1 Observations of ion cyclotron waves within the plasmasphere by Hawkeye 1

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.2314k&link_type=abstract

Journal of Geophysical Research, vol. 82, June 1, 1977, p. 2314-2318.

Computer Science

Sound

6

Ion Cyclotron Radiation, Ionospheric Sounding, Plasmapause, Ring Currents, Satellite Observation, Electric Fields, Hawkeye Satellites, Magnetic Fields, Magnetic Storms, Plasma Waves, Polar Orbits, Spectrum Analysis, Wave Propagation

Scientific paper

A survey of the plasma wave data from the Hawkeye 1 spacecraft has been performed in search of ion cyclotron waves associated with the scattering and loss of ring current ions within and near the plasmapause. During an 18-month period, encompassing about 270 orbits, a total of five events have been found with clearly detectable electric and magnetic fields at frequencies below the proton gyrofrequency. Comparisons of the electric and magnetic field amplitudes for these events provide strong evidence that these waves are ion cyclotron waves. All five events occurred during recovery phases of magnetic storms inside or very close to the plasmapause boundary. The results of this survey confirm and are consistent with the earlier identification of ion cyclotron waves by the Explorer 45 satellites. The Hawkeye 1 observations show that ion cyclotron waves of substantial amplitude occur at magnetic latitudes well away (about 28 deg) from the magnetic equator.

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