A statistical study of ESD whistlers observed during daytime at a low latitude Indian ground station Jammu (L=1.17)

Author & Affiliation:
M. Altaf
Department of Physics, National Institute of Technology, Hazratbal, Srinagar, - 190006, Kashmir (INDIA)
Krishna K. Singh
Atmospheric Research Laboratory, Department of Physics, Banaras Hindus University, Varanasi - 221005 (INDIA)
A.K. Singh
Atmospheric Research Laboratory, Department of Physics, Banaras Hindus University, Varanasi - 221005 (INDIA)
B.L. Koul
Department of Physics, National Institute of Technology, Hazratbal, Srinagar, - 190006, Kashmir (INDIA)
Lalmani
Department of Physics, National Institute of Technology, Hazratbal, Srinagar, - 190006, Kashmir (INDIA)
Keyword:
ESD whistlers , observed during daytime, low latitude Indian
Issue Date:
December 2008
Abstract:

The origin and propagation mechanism of low latitude daytime whistlers are investigated on the basis of the very low frequency (VLF) wave measurements made continuously during day and night hours in North India at our newly setup ground based station Jammu (geomag.lat., 22o 26/ N; L=1.17). From the dispersion analysis of the VLF data collected over a time span of about seven years, extremely small dispersion (ESD) whistlers with dispersion varying from 5-10 sec1/2 in surprisingly large numbers were found during daytime but only in geomagnetic quiet periods. This feature supports the hypothesis of combined ground ionosphere and field- aligned propagation known as hybrid mode of propagation. The lower cut-off frequencies of these whistlers have been evaluated and majority of these whistlers are found to lie in the low frequency range of ~3-4.4 kHz.

Pages:
455-462
ISSN:
2319-8052 (Online) - 2231-3478 (Print)
Source:
DOI:
jusps-B
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Copy the following to cite this article:

M. Altaf; K. K. Singh; A. Singh; B. Koul; Lalmani, "A statistical study of ESD whistlers observed during daytime at a low latitude Indian ground station Jammu (L=1.17)", Journal of Ultra Scientist of Physical Sciences, Volume 20, Issue 3, Page Number 455-462, 2018

Copy the following to cite this URL:

M. Altaf; K. K. Singh; A. Singh; B. Koul; Lalmani, "A statistical study of ESD whistlers observed during daytime at a low latitude Indian ground station Jammu (L=1.17)", Journal of Ultra Scientist of Physical Sciences, Volume 20, Issue 3, Page Number 455-462, 2018

Available from: http://www.ultraphysicalsciences.org/paper/1325/

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