Physics
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976iowa.reptq....k&link_type=abstract
Progress Report Iowa Univ., Iowa City. Dept. of Physics and Astronomy.
Physics
Earth Magnetosphere, Hawkeye Satellites, Ion Cyclotron Radiation, Ionic Waves, Plasma Radiation, Plasmas (Physics), Radiation Belts, Scientific Satellites
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 plasma-pause. During an 18 month period, consisting of about 270 orbits, a total of 5 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 the recovery phase of a magnetic storm at radial distances within 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 satellite. The Hawkeye-1 observations show that ion cyclotron waves of substantial amplitude occur at magnetic latitudes well away from the magnetic equator.
Gurnett Donald A.
Kintner Paul M.
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