Wave mode identification of electrostatic noise observed with ISEE 3 in the deep tail boundary layer

Details Wave mode identification of electrostatic noise observed with ISEE 3 in the deep tail boundary layer Wave mode identification of electrostatic noise observed with ISEE 3 in the deep tail boundary layer

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9614065t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Aug. 1, 1991, p. 14,065-14,073.

Physics

3

Electromagnetic Noise, Electrostatics, Geomagnetic Tail, Noise Spectra, Satellite Observation, Wave Propagation, Electric Fields, International Sun Earth Explorers, Noise Generators, Normal Density Functions, Very Low Frequencies

Scientific paper

The characteristics of the VLF electrostatic noise observed with ISEE 3 in the low-latitude boundary layer of distant geomagnetic tail are examined using a display format for the wave dynamic spectra different from that used by Scarf et al. (1984). It is shown that the observed noise is composed of impulsive bursts. The results of the detailed analysis of the noise parameters are used to develop a model of plasma wave behavior in the plasma rest frame. A hypothesis is proposed that the wide frequency extent of the noise spectra is composed of Doppler effects of waves propagating nearly omnidirectionally within the plasma rest frame, which is moving with the electron bulk speed. On the basis of this hypothesis, the wavelength of the observed waves were determined from the width of the frequency extent and the measured electron bulk speed. It is shown that the wavelength ranges from 2 to 8 times the plasma Debye length.

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