The spatial extent of radial magnetic pulsation events observed in the dayside near synchronous orbit

Details The spatial extent of radial magnetic pulsation events observed in the dayside near synchronous orbit The spatial extent of radial magnetic pulsation events observed in the dayside near synchronous orbit

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9713741e&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A9, Sept. 1, 1992, p. 13,741-13,758.

Physics

25

Daytime, Earth Orbital Environments, Geomagnetic Micropulsations, Plasma Waves, Plasmasphere, Ampte (Satellites), Goes Satellites, Plasma Density

Scientific paper

The spatial extent of magnetic pulsation events with predominantly radial polarization was investigated using simultaneous observations made aboard the AMPTE CCE satellite and aboard the GOES 5 and GOES 6 satellites. The results show that radially polarized pulsations in the equatorial dayside outer magnetosphere occur in radially narrow and often sharply bounded strips extending typically from late morning to dusk. The frequencies of these waves, which appear to be confined to the outer plasmasphere, are determined by local conditions. No correlation was found between plasma beta (in the range from 0.23 to 1.09) and the wave onset, the amplitude, or the ratio of compressional to radial components. These characteristics suggest that the wave growth and energy dissipation, the wave polarization, and the pulsation frequency are all dependent on the characteristics of the lowest-energy plasmas present in this region and/or along the affected flux tubes.

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