Whistler leakage from narrow ducts

Details Whistler leakage from narrow ducts Whistler leakage from narrow ducts

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jatp...48..455s&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 48, May 1986, p. 455-462.

Physics

12

Ducts, Satellite Observation, Wave Propagation, Whistlers, Altitude, Isis Satellites, Leakage, Very Low Frequencies, Wavelengths

Scientific paper

Low altitude satellite observations of a variation in the upper cut-off-frequency of whistlers with latitude (at constant altitude) can be convincingly explained in terms of different whistler frequencies leaving a duct at different altitudes. This selective leakage is explained by a downcoming wave escaping from a duct at an altitude where its wavelength becomes approximately equal to the duct width. This altitude is shown to decrease with increasing wave frequency. Leakage according to this mechanism is shown to result in a minimum duct width at a given altitude for ducted guidance of VLF waves. It is found to be consistent with the distribution of duct widths inferred from whistler observations made aboard the low altitude satellite ISIS 1.

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