Computer Science – Sound
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9411855f&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Sept. 1, 1989, p. 11855-11863. Research supported by the Australian R
Computer Science
Sound
23
Geomagnetic Micropulsations, Ion Cyclotron Radiation, Magnetospheric Ion Density, Satellite Sounding, Ground Stations, International Sun Earth Explorer 1, Magnetohydrodynamic Waves, Polarization (Waves)
Scientific paper
The magnetospheric generation and propagation characteristics of ion cyclotron waves associated with a Pc 1 emission observed by a network of four middle and low-latitude ground stations are determined using ground source location techniques and ISEE 1 plasma data. The source region at L = 4.7 + or - 0.7 is determined from propagation in the F2 region ionospheric duct. The ion cyclotron wave packet interhemispheric bounce period measured from the ground spectra increases with time from 140 to 155 s during the event but is in agreement with dispersion calculations undertaken using ISEE 1 electron density and cool to cold ion composition data in a H(+) plasma with 8-10 percent He(+) and less than 1 percent 0(+) ions. With these results it is possible to completely describe the wave generation mechanism and the magnetosphere ionosphere propagation characteristics for the Pc 1 event.
Fraser Brian J.
Kemp W. J.
Webster James D.
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