Physics
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.7213s&link_type=abstract
Journal of Geophysical Research, vol. 84, Dec. 1, 1979, p. 7213-7222.
Physics
14
Electric Fields, Geomagnetic Latitude, Geomagnetic Pulsations, Magnetospheric Instability, Satellite Observation, Amplitudes, Magnetohydrodynamic Waves, Magnetometers, Ogo-5, Propagation Modes, Standing Waves
Scientific paper
The occurrence frequency and spatial structure of Pc 5 magnetic pulsations in the dawnside of the plasma trough have been studied using data from the Ogo 5 satellite. The wave magnetic fields were obtained from the University of California, Los Angeles, flux-gate magnetometer measurements, and one component of the wave electric field was inferred from oscillations of the ion flux measured by the Lockheed light ion mass spectrometer. During portions of seven of the 19 passes comprising the survey, Pc 5 oscillations were observed in the ion flux but not in the magnetic field, and in each case the satellite was within 10 deg of the geomagnetic equator. Above 10 deg latitude, transverse magnetic and electric oscillations were both observed. The results are consistent with the model of a standing Alfven wave along a resonant field line with the geomagnetic equator as a node of the magnetic perturbation, that is, an odd mode.
Galland Kivelson Margaret
Singer Howard J.
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