Other
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977p%26ss...25.1087g&link_type=abstract
Planetary and Space Science, vol. 25, Dec. 1977, p. 1087-1092.
Other
Atmospheric Scattering, Ion Density (Concentration), Ionospherics, Tropical Regions, Whistlers, Atmospheric Composition, Atmospheric Models, Sonograms, Wave Dispersion, Waveguides
Scientific paper
The effect of ions on whistler dispersion characteristics has been studied. It is shown that the significant changes in the dispersion characteristics of low-latitude whistlers are brought about by the presence of ions. The dispersions for Nainital (geomagnetic lat. 19 deg 1 min N) and Gulmarg (geomagnetic lat. 24 deg 10 min N) are found to peak around 800 Hz. The short whistler sonograms recorded at Nainital and Gulmarg have been analysed, using the complete dispersion equation and the effect of ions has been shown. At higher frequencies the dispersion is found to decrease steadily and becomes independent of ions. Some examples of short whistlers have been found whose characteristics do not conform to the general trend of low-latitude whistlers, and, on the other hand, these whistlers show a constant dispersion unaffected by ions up to a fairly low frequency and thereafter decrease sharply at lower frequencies.
Gupta G. P.
Narain Singh Rishi
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