Physics
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.1861s&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, Oct. 1990, p. 1861-1864.
Physics
10
Electromagnetic Pulses, Plasma Waves, Satellite Observation, Very Low Frequencies, Electric Fields, Electromagnetic Spectra
Scientific paper
Wideband VLF electromagnetic bursts are observed on the DE 1 satellite by both the electric- and magnetic-field sensors in the frequency range 0.650-16.0 kHz. The impulsive signals endure for a relatively short time (about 1 sec or less) and exist in the frequency range from well below to well above the local gyrofrequency. They are typically found at L greater than 4 over a 40-deg range of latitudes including the geomagnetic equator and are often accompanied by discrete emissions or a band of hiss. Some observed features are consistent with previous observations of electrostatic plasma waves (Ondoh et al., 1989; Reinleitner et al., 1983); however, the magnetic measurements clearly indicate that the impulsive signals are electromagnetic in nature, a result that has not been reported before. The possibility of spacecraft discharge effects as the cause of these signals is discussed.
Helliwell Robert A.
Inan Umran S.
Sonwalkar Vikas S.
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