Physics
Scientific paper
May 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.2267c&link_type=abstract
Journal of Geophysical Research, vol. 81, May 1, 1976, p. 2267-2274.
Physics
11
Earth Magnetosphere, Extremely Low Frequencies, Hiss, Magnetic Measurement, Plasma Density, Sudden Enhancement Of Atmospherics, Amplitudes, Ion Density (Concentration), Mass Spectroscopy, Periodic Variations, Plasmapause, Radio Spectra
Scientific paper
The low-frequency narrow hiss bands associated with plasma-density enhancements in the magnetosphere near and beyond L = 4 have been studied with the search coil magnetometer and ion mass spectrometer data from OGO 5. ELF hiss is found to accompany most of the detached plasmas in the outer magnetosphere and to be sharply limited by the steep ion-density gradient at their boundary. The observations indicate that the hiss originates in and is ducted by the plasma-density enhancements. In a particularly favorable case after an interval of low AE and Dst indices, a series of enhanced plasma-density peaks was observed between L = 4 and L = 6 in the afternoon local-time sector. In this case, it was possible to develop an empirical relation among hiss amplitude, plasma density, and L by using in situ simultaneous measurements.
Chan Kai Wing
Holzer Robert E.
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