Physics
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9413425a&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Oct. 1, 1989, p. 13425-13445. Research supported by NASA.
Physics
28
Magnetohydrodynamic Waves, Plasma Oscillations, Satellite Observation, Space Plasmas, Standing Waves, Toroidal Plasmas, Ampte (Satellites), Frequency Response, Spacecraft Motion, Spacecraft Trajectories, Time Response
Scientific paper
This paper considers the distortion effect of the simultaneous occurrence of locally resonant toroidal pulsations over a range of L shells on the interpretation of spacecraft observations of these waves. A theoretical model is developed which yields quantitative predictions of the phase shear effect that causes a shift from the true pulsation frequency measured from a spacecraft moving radially across L shells. Calculations with this model indicate that, due to this effect, the AMPTE/CCE satellite should observe 8-30 percent lower frequencies on outbound passes than on inbound passes. A comparison of fundamental mode frequency measurements made on 10 inbound and 9 outbound passes of the AMPTE/CCE satellite in the morning sector confirms the predictions of the model.
Anderson Benjamin J.
Engebretson Mark J.
Zanetti Laurence J.
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