Physics
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.3811b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, April 1, 1990, p. 3811-3817.
Physics
11
Geoelectricity, Ionospheric Ion Density, Plasma Layers, Spectral Energy Distribution, Ampte (Satellites), Cyclotron Radiation, Extremely Low Radio Frequencies, Plasma Waves
Scientific paper
Using 4 months of tail data obtained by the ELF/MF spectrum analyzer and the plasma instrument on board the AMPTE/IRM satellite, more than 50,000 ten-second-averaged electric wave spectra were analyzed in order to establish typical spectra for periods of high and low ion density and high and low ion beta. Highest average spectral densities are obtained in the low-beta plasma sheet boundary layer, where the spectrum is that of broadband electrostatic noise extending to frequencies near and above the upper hybrid frequency. Lowest wave intensities are encountered in the high-beta inner central plasma sheet. The outer central plasma sheet has generally low wave intensities and is dominated by electron cyclotron odd half-harmonics and electron plasma wave emissions.
Baumjohann Wolfgang
LaBelle James
Treumann Rudolf A.
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