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Journal of Environmental Nanotechnology

(A Quarterly Peer-reviewed and Refereed International Journal)
ISSN(Print):2279-07 48; ISSN(Online):2319-5541

Estimation of magnetospheric plasma parameters from whistlers observed at Low Latitudes


Whistler observations during nighttimes made at low latitude Indian ground stations Jammu
(geomag.lat.,29o 26/ N; L = 1.17), Nainital (geomag.lat.,19o 1/ N; L = 1.16) and Varanasi (geomag.lat.,14o
55/ N; L = 1.11) are used to deduce electron temperatures and electric field in the vicinity of the
magnetospheric equator. The accurate curve fitting and parameter estimation technique are used to compute
nose frequency and equatorial electron densities from the dispersion measurements of short whistlers
recorded at Jammu, Nainital and Varanasi. In this paper our aim is to estimate the Magnetospheric
electron temperatures and electric field from the dispersion analysis of short whistlers observed at low
latitudes by using the different methods, the results obtained are in good agreement with the results reported
by other workers.

Article Type: Orginal Research Article

Corresponding Author: M. Altaf 1  

Email: altafnig@rediffmail.com

This article has not yet been cited.

M. Altaf 1*,  Ram Vyas 2.  

1. Department of Physics, National Institute of Technology, Hazratbal Srinagar, Kashmir, India

2. Department of Electrical engineering, National Institute of Technology, Hazratbal Srinagar, Kashmir, India

J. Environ. Nanotechnol. Volume.2, No.2 (2013) pp.17-28
ISSN: 2279-0748 eISSN: 2319-5541
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Andrews, M.K., Night time Radial plasma drifts and coupling fluxes at L=2.3 from
whistler mode measurements, Planet space sci. 28, 407-417 (1980).http://dx.doi.org/10.1016/0032-0633(80)90044-6

Bernard, L.P., A new nose extension method for whistlers, J. Atmao. Terr. Phys.
35,871-880 (1973).http://dx.doi.org/10.1016/0021-9169(73)90069-X

Carpenter, D.L., Stone,K.,Siren,J.C,Crystal, T.L., Magnetospheric electric field
deduced from drifting whistler path, J.Geophys. Res.77, 2819-2834 (1972).http://dx.doi.org/10.1029/JA077i016p02819

Carpenter, D.L., Park,C.G., On what ionospheric workers should know about
the plasmapause and plasmasphere, Review of Geophysics and space
phys.,11,133-154 (1973).http://dx.doi.org/10.1029/RG011i001p00133

Chauhan, P. and Singh.B., High dispersion whistlers observed at Agra, Planet space
sci., 40, 873-877 (1992).http://dx.doi.org/10.1016/0032-0633(92)90113-3

Decreau, P.M., Beghin, C. and Parrot, M., Global characteristics of the cold plasma
in the equatorial plasmapause region as deduced from the GEOS-I mutual
impedance prob, J.Geophys. Res. 87, 695-712 (1982).http://dx.doi.org/10.1029/JA087iA02p00695

Dowden, R.L. and Mck. Allcock, G., Determination of nose frequency of nonnose
whistlers, J.Atmos. Terr. Phys., 33, 1125-1129 (1971).http://dx.doi.org/10.1016/0021-9169(71)90133-4

Guthart, H., Nose whistler dispersion as a measure of magnetospheric electron
temperature, Radio Sci., 69D, 1417- 1424 (1965).

Hamar, D., Tarcsai, G., Lichtenberger, J., Smith, A.J., Yearby, K.H., Fine structure
of whistlers recorded digitally at Hally Anteritia, J.Atmos. Terr. Phys., 52, 801-
810 (1990).http://dx.doi.org/10.1016/0021-9169(90)90013-D

Hamar,D., Ferencz, Cs., Lichtenberger, J., Tarcsai, G., Smith, A.J., Yearby, K.H.,
Trace splitting of whistlers: a signature of fine structure or mode fitting in
magnetospheric ducts, Radio Sci. 27, 341 (1992).http://dx.doi.org/10.1029/91RS02191

Hamar, D., Tarcsai,G., High resolution frequency-time analysis of whistlers using
digital mached filtering-part I: Theory and simulation studies, Ann.Geophys., 38,
119-128 (1982).

Hayakawa, M., Tanaka, Y., Sazhin, S.S., Tixiier, M. and Okada, T., Substorm
associated VLFemissions with frequencydrift in the premidnight sector,
J.Geophys. Res., 93, 5685-5700 (1988).http://dx.doi.org/10.1029/JA093iA06p05685

Ho, D. and Bernard, L.C., A fast method to determine the nose frequency and
minimum group delay of whistlers when the causative spheric is unknown,
J.Atmos. Terr. Phys. 35, 881-887 (1973).http://dx.doi.org/10.1016/0021-9169(73)90070-6

Kobelev, V.V. and Sazhin, S.S., An estimate of magnetospheric electron temperature
from the form of whistlers’trograms, J.Techn. Phys. (Letters), 9, 862-865

Lalmani, Kumar, R., Singh, R., Singh, B., Characteristics of the observed low
latitude verylow frequency emission periods and whistler-mode group delay
at Jammu, Ind. J. Radio and space phys., 30, 214-216 (2001).

Lichtenberger, J., Tarcsai, G., Pasztor, S., Ferencze, Cs., Hamar, D., Molchanov,
O.A., Golyavin, A.M., Whistler doublets and hyperfine structures recorded digitally
by the signal analyzer and sampler on the active satellite, J.Geophys. Res., 96,
21149 (1991).

Liemohn, H.B. and Scarf, F.L., Exospheric electron temperatures from nose whistler
attenuation, J.Geophys. Res., 67, 1785- 1789 (1962).

Liemohn, H.B. and Scarf, F.L., Exospheric electron temperatures from nose whistler
attenuation, J.Geophys. Res., 67, 1785- 1789 (1962a).

Liemohn, H.B. and Scarf, F.L., Whistler attenuation by electron with an E-2.5
distribution, J.Geophys. Res., 67, 4163- 4167 (1962b).

Liemohn, H.B. and Scarf, F.L., “Whistler determination of electron energy and
density distribution in the magnetosphere, J.Geophys. Res., 69, 883-904, 1964.

Mc Chesney, J. and Hughes, A.R.D., Temperature in the plasmasphere
determined from VLF observations, J. Atmos. Terr. Phys., 45, 33-39 (1983).

Park, C.G., Method of determining electron concentration in the magnetosphere from nose whistlers, Tech. Rep. 3454-I, Radiosci. Lab. Stanford Electron Lab. Stanford University, Stanford, California (1972).

Park, C.G., Whistler observations of the interchange of ionization between the
ionosphere and the protonosphere, J. Geophys. Res., 75, 4249-4260 (1970).

Rao, M. and Lalmani, An evaluation of duct lifetimes from low latitude ground
observations of whistlers, Planet space sci. 23, 923-927 (1975)

Rycroft, M.J. and Mathur, A., The determination of the minimum group delay
of a non nose whistler, J. Atmos. Terr. Phys. 35, 2177-2182 (1973).

Sazhin, S.S., Bognar, P., Smith, A.J. and Tarcsai, Gy., Magnetospheric electron
temperature inferred from whistler dispersion measurements, Ann. Geophys.
11, 619- 623 (1993).

Sazhin, S.S., Smith, A.J. and Sazhin, E.M., Can magnetospheric electron
temperature be inferred from whistler dispersion measurements, Ann.Geophys.
8, 273-285 (1990).

Sazhin, S.S., Hayakawa, M. and Bullough, K., Whistler diagnostic of magnetospheric
parameters: a review, Ann. Geophys. 10, 193-308 (1992).

Scarf, F.L., Landau damping and the attenuation of whistlers, Phys. Fluids, 5, 6-13 (1962).

Seely, N.T., Whistler propagation in a distorted quiet time model magnetosphere,
Tech. Rep. 3421-I, radio Science Lab., Stanford Electronics Lab., Stanford
University, California (1977).

Serbu, G.P. and Maier, E.J.R., Low energy electrons measured on IMP2,
J.Geophys. Res.71, 3755-3766 (1966).

Singh, R.P., Rajesh Singh, Lalmani, Hamar, D.and Lichenberger, J., Application of
matched filtering to short whistlers recorded at low latitudes, J. Atmos. solar
Terr. Phys. 66, 407-413 (2004).http://dx.doi.org/10.1016/S1364-6826(99)00033-4

Singh, R.P., Patel, R.P., Singh, A.K., Hamar, D. and Lichenberger, J., Matehed
filtering parameter estimation method and analysis of whistlers recorded at
Varanasi, Pramans J. Phys. (Indian Acad. Of Sciences) 55, 685-691 (2000).

Singh, R.P., Singh, D.K., Singh, A.K., Hamar, D. and Lichenberger, J, Application of
mateched filtering and parameter estimation technique to low latitude
whistlers, J.Atmos. solar Terr. Phys. 61, 1081-1093 (1999).

Singh, R.P., Singh, K., Ashok K. Singh, Hamar, D. and Lichenberger, J., Matched
filtering analysis of diffused whistlers and its propagation characteristics at low
latitudes, J.Atmos. solar Terr. Phys. 68, 710-714 (2006).http://dx.doi.org/10.1016/j.jastp.2005.10.018

Singh, R.P., Whistler studies at low latitudes: a review, Ind. J. Radio space phys. 22,
139-155 (1993).

Singh, B. and Hayakawa, M., Propagation modes of low and very low latitude
whistlers, J. Atmos. solar Terr. phys. 63, 1133-1147 (2001).http://dx.doi.org/10.1016/S1364-6826(00)00218-2

Singh, R.P., Singh, A.K., Singh, D.K., Plasmaspheric parameters as determined
from whistler spectrograms: a review. J. Atmos. Terr. Phys. 60, 494-508

Smith, R.L. and D.L. Carpenter, Extension of nose whistler analysis, J. Geophys.
Res. 66, 2582-2586 (1961).

Somayajulu, V.V., Tantry, B.A.P, Whistlers at low latitudes, Indian J. Radio space
Phys. 1, 102-118 (1972).

Tarcsai, G., Routine whistler analysis by means of accurate curve fitting, J.Atmos.
Terr. Phys. 37, 1447-1457(1975).