40 research outputs found
An Explanation of Daytime Discrete VLF Emissions Observed at Jammu (L = 1.17) and Determination of Magnetospheric Parameters
Get PDFQuiet Time Average Electron Density Profiles in the Magnetosphere Deduced from Whistlers Observed at a Low Latitude Ground Station Jammu
Get PDFMultiflash whistlers in ELF-band observed at low latitude
Get PDFMultiflash whistler-like event in the ELF-band, observed during
March 1998 at low latitude station Jammu, is reported. The most
prominent feature of these events is the multiflash nature along
with the decrease in frequency within a very short span of time
resembling similar to terrestrial whistlers. The events have a
significantly smaller time duration (0.5–3.5 s) than those
reported earlier from high, mid and low latitudes and also display a
diurnal maximum occurring around 09:30 h (IST). There have been
similar reportings from other latitudes, but whistlers in the
ELF-band with a multiflash nature along with a precursor emission
have never been reported. Lightning seems to be the dominant source
for the ELF whistlers reported here
Excitation of oblique whistler waves in magnetosphere and in interplanetary space at 1 A.U.
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Segregation to oxide grain boundaries in high temperature FeCrAlRE alloys
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Effect of Solar Activity on Whistler Dispersion
Get PDF244-246Dispersion of the whistler observed at the low latitude station, Nainital, during Mar. 1971 has been compared with the solar radio emission at 245 MHz and the sunspot numbers. It is found that the whistler dispersion has a positive correlation with the solar activity, with a time lag of one day, while it has a negative correlation with the sunspot numbers. Also, the hourly variations of dispersion have been found to be somewhat periodic, with a period corresponding to the life-time of the whistler duct
