Abstract
Whistler data recorded during 5-h period at our low latitude ground station Srinagar (geomag. lat. 24°10′N; L = 1.28) are used to determine lifetime of whistler ducts. On certain occasions, whistler occurrence rate at Srinagar is found to exhibit some periodicity. Power spectrum analysis of occurrence rate yields a dominant period of about 1 hour. It is suggested that this period is an indication of the duct-lifetimes at low L-values. Dispersion analysis of these whistlers has qualitatively confirmed the existence of separate ducts during the period of observation. Further the dispersion analysis shows that these whistlers have propagated in the magnetosphere along higher L-values (L = 2.10–4.12). Power spectrum analysis may not be applicable to the whistler data corresponding to high L-values because at high latitudes the occurrence rate of whistlers is very high. Moreover a large number of ducts might simultaneously contribute to the occurrence rate.
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References
R A Helliwell Whistlers and Releted Ionospheric phenomena (Palo Alto, USA: Stanford University Press) (1965)
J J Angerami J. Geophys. Res. 75 6115 (1970)
N R Thomson J. Geophys. Res. Lett. 2 451 (1975)
R L Smith J. Res. NBS-D. Radiopropag. 64D 505 (1960)
R L Smith J. Geophys. Res. 66 3699 (1961)
R L Smith and J J Angerami J.Geophys. Res. 73 1 (1968)
C G Park and D L Carpenter J. Geophys. Res. 75 3825 (1970)
C G Park J. Geophys. Res. 75 4249 (1970)
V V Somaya Julu and B A P Tantary J. Geomagn. Geoelectr. 20 1 (1968)
R P Singh Indian J. Radio Space Phys. 22 139 (1993)
Lalmani J. Geophys. 56 53 (1984)
R P Singh, Lalmani and U P Singh Ann. Geophys. 11 1011 (1993)
S K Chakrabarti et al. Indian J. Phys. 86 323 (2012); M Altaf, K K Singh, S A Sheikh, A K Singh and Lalmani Indian J. Phys. 84 1481 (2010)
K K Singh et al. Indian J. Phys. 82 379 (2008)
S A Sheikh, K K Singh, B L Koul and Lalmani Indian J. Phys. 84 501 (2010)
M Altaf, K K Singh, S A Sheikh, A K Singh and Lalmani Indian J.Phys. 84 1481 (2010)
T M Latha, P P Naidu, D N M Rao and M I Devi Indian J. Phys. 86 947 (2012)
H J Hansen, N W J Scourfield and J P S Rash J. Atmos. Terr. Phys. 45 789 (1983)
T Okuzawa, K Yamamaka and T Yoshino Rep. Ionos. Space Res. (Tokyo, Japan) 25 17 (1971)
T Madden Natural Electromagnetic Phenomena below 30 kc/s (New York, USA: Plenum Press) p 429 (1964)
M Rao and Lalmani Planet. Space Sci. 23 923 (1975)
S Ray, S K Chakrabarti and S Sasmal Indian J. Phys. 86 85 (2012); P N Khosa, Lalmani, M M Ahmed and V K Rawal Moon Planets 28 329 (1983)
R P Singh, A K Singh, U P Singh and R N Singh Adv. Space Res. 14 225 (1994)
U P Singh, A K Singh, Lalmani, R P Singh and R N Singh Indian J. Radio Space Phys. 21 246 (1992)
R P Singh, R Singh, Lalmani, D Hamer and J Lichtenberger J. Atmos. Solar Terr. Phys. 66 07(2004)
A B Collier et al. Ann. Geophys. 28 499 (2010)
A B Collier, J Lichtenberger, M A Cliverd, C J Rodger and P Steinbach J. Geophys. Res. 116 AO3219 (2011)
K Ohta and M Hayakawa Pure Appl. Geophys. 113 167 (1990)
R N Singh, Lalmani and R P Singh Nature. 266 40 (1977)
M Hayakawa and Y Tanaka Rev. Geophys. Space Phys. 16 111 (1978)
S S De et al. Indian J. Phys. 85 447 (2011)
Acknowledgments
The reported work is supported by Department of Science and Technology, Govt. of India. K K Singh acknowledges support from the DST India for Fast Track Project SR/FTP/ES-121/2009. S A Sheikh is thankful to Head of Department of Physics, University of Kashmir, India for his constant encouragement and support.
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Singh, K.K., Sheikh, S.A., Singh, A.K. et al. Estimation of duct-lifetimes for storm-time low latitude whistlers observed at Srinagar, India. Indian J Phys 87, 499–505 (2013). https://doi.org/10.1007/s12648-013-0274-8
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DOI: https://doi.org/10.1007/s12648-013-0274-8