Computer Science – Sound
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85..130m&link_type=abstract
Journal of Geophysical Research, vol. 85, Jan. 1, 1980, p. 130-138.
Computer Science
Sound
2
Ionospheric Propagation, Satellite Sounding, Upper Ionosphere, Whistlers, Coupled Modes, Frequency Response, Ogo-6, Spectral Bands
Scientific paper
Pararesonance (PR) whistlers observed in the topside ionosphere by the Dartmouth receiver on Ogo 6 are examined. The study extends that of Walter and Angerami (1969) to higher frequencies and shows that the upper cutoff frequency of PR whistlers closely follows a 1/L to the 4th dependence from 6 to 100 kHz (at L = 2.90 and 1.37, respectively). Most PR whistlers are attached to paralongitudinal (PL) whistlers due, presumably, to intermode coupling. The 'walking trace', or unattached PR whistler, reported by Walter and Angerami is evidently unusual. The upper cutoff frequency follows 1/L to the 4th whether attachment occurs or not. Rising sawtooth appendages starting at the upper cutoff frequency are frequency seen on PR whistlers.
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