Physics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9613913c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Aug. 1, 1991, p. 13,913-13,929.
Physics
17
Ionic Waves, Magnetohydrodynamic Waves, Space Charge, Spacecraft Charging, Spacelab, Color Coding, Earth Orbital Environments, Orbital Velocity, Space Shuttles, Spectral Methods
Scientific paper
The observational characteristics are listed and a theoretical analysis is presented for plasma waves observed near the Space Shuttle during the Spacelab 2 mission. The characteristics of the plasma are listed including the frequency distributions of wave-electric fields, amplitude and frequency variations, and relationships such as that between wavenumber and wave frequency. Linear theory is used to describe the plasma by incorporating the Doppler-shifted lower hybrid waves driven by beamlike distributions of water ions. The theoretical description can explain the generation of waves that satisfy four conditions which are consistent with the observed plasma. Spatial inhomogeneities and nonlinear effects are shown to change the predicted linear spectrum, and the ratio of wave energy to thermal plasma energy shows that strong nonlinear turbulence effects are significant. The results are of interest to the optimization of conditions for observing natural or artificially generated plasma waves from the Space Shuttle.
Cairns Iver H.
Gurnett Donald A.
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