Deuteron whistler and trans-equatorial propagation of the ion cyclotron whistler

Details Deuteron whistler and trans-equatorial propagation of the ion cyclotron whistler Deuteron whistler and trans-equatorial propagation of the ion cyclotron whistler

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24..359w&link_type=abstract

Planetary and Space Science, vol. 24, Apr. 1976, p. 359-364. NASA-supported research.

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2

Ion Cyclotron Radiation, Ionospheric Propagation, Transequatorial Propagation, Whistlers, Deuterons, Gyrofrequency, Protons, Tropical Regions, Upper Ionosphere

Scientific paper

The paper investigates two unusual types of ion cyclotron whistlers that were found in the low-latitude topside ionosphere by analyzing ISIS VLF electric-field data received at Kashima, Japan. One type is characterized by an asymptotic frequency equal to one half the local proton gyrofrequency; the asymptotic frequency of the other type corresponds to the minimum proton gyrofrequency along the geomagnetic field line passing through the satellite. The observations are compared with theoretical spectrograms of the ion cyclotron whistlers computed for appropriate model distributions of electrons and ions in the topside ionosphere. It is found that the whistlers with the asymptotic frequency of one half the local proton gyrofrequency are deuteron whistlers and that the other whistlers are due to the transequatorial propagation of proton or deuteron whistlers originating in the southern hemisphere.

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