Physics
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2463p&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 23, p. 2463-2466
Physics
27
Electromagnetic Interactions, Electromagnetic Radiation, Electrostatic Waves, Extremely Low Frequencies, Geosynchronous Orbits, Magnetic Signals, Signal Analysis, Statistical Analysis, Electric Fields, Emission Spectra, Frequency Analyzers, Geos 2 Satellite, Magnetic Fields, Satellite-Borne Instruments, Spectrograms, Synchronous Satellites
Scientific paper
GEOS 2 is a geostationary satellite that was launched with a wave experiment. The data provided during its lifetime (approximately 3.5 years) constitute a unique set for the statistical study of electomagnetic and electrostatic waves at L = 6.6. The aim of this paper is to present maps of the average intensity of the electric and magnetic field. The location of the more intense emissions up to 4.6 kHz is shown as a function of local time and frequency. Such emissions are mainly composed of hiss, chorus and electroncyclotron harmonic (ECH) waves. Their locations were specified and compared with data from the OGO 5 and SCATHA satellites. In particular, this study highlights the characteristics of chorus emissions with a gap at half the electron gyrofrequency. It is also shown that global magnetic activity only slightly influences wave amplitude.
Gaye C. A.
Parrot Michel
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