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A case study of whistlers recorded at Varanasi (L = 1.07)

Abstract

Large number of high dispersion whistlers recorded at low latitude station Varanasi (L = 1.07) are analysed and it is find out that they have propagated along Lā‰ƒ 2.12ā€“2.76. This is explained by considering the propagation of whistlers through the earth-ionosphere wave guide after exiting from the duct towards the equator. Using diffusive equilibrium model (DE-1), we have estimated equatorial electron density, total electron content in a flux tube and large scale convective electric fields which are in good agreement with the results reported by other workers from the analysis of mid latitude whistlers. The significance of this paper is to probe mid latitude plasmasphere using whistlers recorded at low latitudes. Further, an attempt has been made to study the propagation mechanism of low latitude whistlers.

References

  • Andrews, M. K., F. B. Knox, and N. R. Thomson, Magnetospheric electric fields and protonospheric coupling fluxes inferred from simultaneous phase and group path measurement on whistler-mode signals, Planet. Space Sci., 26, 171ā€“183, 1978.

    ArticleĀ  Google ScholarĀ 

  • Bernard, L. C., A new nose extension method for whistlers, J. Atmos. Terr. Phys., 35, 871ā€“880, 1973.

    ArticleĀ  Google ScholarĀ 

  • Block, L. P. and D. L. Carpenter, Derivation of magnetospheric electric fields from whistler data in a dynamic geomagnetic field, J. Geophys. Res., 79, 2783ā€“2789, 1974.

    ArticleĀ  Google ScholarĀ 

  • Carpenter, D. L., New whistler evidence of a dynamo origin of electric fields in the quiet plasmasphere, J. Geophys. Res., 83, 1558ā€“1564, 1978.

    ArticleĀ  Google ScholarĀ 

  • Carpenter, D. L., K. Stone, J. C. Siren, and T. L. Crystal, Magnetospheric electric field deduced from drifting whistler paths, J. Geophys. Res., 77, 2819ā€“2836, 1972.

    ArticleĀ  Google ScholarĀ 

  • Dowden, R. L. and G. M. Allcock, Determination of nose frequency of non-nose whistlers, J. Atmos. Terr. Phys., 33, 1125ā€“1129, 1971.

    ArticleĀ  Google ScholarĀ 

  • Hamar, D., G. Tarcsai, J. Lichtenberger, A. J. Smith, and K. H. Yearby, Fine structure of whistler recorded digitally at Halley, Antarctica, J. Atmos. Terr. Phys., 52, 801ā€“810, 1990.

    ArticleĀ  Google ScholarĀ 

  • Khosa, P. N., M. M. Ahmad, and Lalmani, Whistler observation of magnetospheric electric field in the night side plasmasphere at low latitudes, The Moon and Planet, 27, 453ā€“462, 1982.

    ArticleĀ  Google ScholarĀ 

  • Lalmani, A. Ahmad, and M. M. Ahmad, Ionosphere plasmasphere coupling electron fluxes from low latitude whistler studies at Nainital during geomagnetic storm, Planet. Space Sci., 40, 1409ā€“1418, 1992.

    ArticleĀ  Google ScholarĀ 

  • Lalmani, A. Ahmad, and R. Singh, An estimate of quiet time plasmaspheric electric fields from whistler observations at low latitude, J. Geomag. Geoelectr., 48, 211ā€“220, 1996.

    ArticleĀ  Google ScholarĀ 

  • Mishra, K. D., Lalmani, and B. D. Singh, Magnetospheric electric field from low latitude whistlers during magnetic storm, Planet. Space Sci., 28, 449ā€“452, 1980.

    ArticleĀ  Google ScholarĀ 

  • Park, C. G., Methods of determining electron concentration in the magneto-sphere from nose whistlers, Tech. Report No. 3454-1, Radioscience Lab., Stanford University, Stanford, 1972.

    Google ScholarĀ 

  • Park, C. G., Substorm electric fields in the evening plasmasphere and their effects on the underlying F-layer, J. Geophys. Res., 81, 2283ā€“2288, 1976.

    ArticleĀ  Google ScholarĀ 

  • Park, C. G., Whistler observations of substorm electric fields in night side plasmasphere, J. Geophys. Res., 83, 5773ā€“5777, 1978.

    ArticleĀ  Google ScholarĀ 

  • Park, C. G., D. L. Carpenter, and D. B. Wiggin, Electron density in the plasmasphere: whistler data on solar cycle, annual, and diurnal variations, J. Geophys. Res., 83, 3137ā€“3144, 1978.

    ArticleĀ  Google ScholarĀ 

  • Ralchovski, T. M., Electric field in the inner plasmasphere obtained from whistlers daytime observations, Rep. Bulg. Acad. Sci., 34, 1503ā€“1504, 1981.

    Google ScholarĀ 

  • Sagredo, J. L., I. D. Smith, and K. Bullough, The determination of whistler nose-frequency and minimum delay and its implication for the measurements of the east-west electric field and tube content in the magnetosphere, J. Atmos. Terr. Phys., 35, 2035ā€“2046, 1973.

    ArticleĀ  Google ScholarĀ 

  • Saxton, J. M. and A. J. Smith, Quiet time plasmaspheric electric fields and plasmasphere, ionosphere coupling fluxes at L = 2.5, Planet. Space Sci., 37, 283ā€“293, 1989.

    ArticleĀ  Google ScholarĀ 

  • Sazhin, S. S., M. Hayakawa, and K. Bullough, Whistler diagnostics of magnetospheric parameters: A review, Ann. Geophys., 10, 293ā€“308, 1992.

    Google ScholarĀ 

  • Shimakura, S., M. Moriizumi, and M. Hayakawa, Propagation mechanism of very unusual low latitude whistlers with additional traces of the earthionosphere waveguide propagation effect, Planet. Space Sci., 39, 611ā€“616, 1991.

    ArticleĀ  Google ScholarĀ 

  • Singh, A. K., Study of inner magnetosphere by VLF waves, Ph.D. Thesis, Banaras Hindu Univ., India, 1995.

    Google ScholarĀ 

  • Singh, R. P., Whistler studies at Low Latitudes: A review, Ind. J. Rad. Space Phys., 22, 139ā€“155, 1993a.

    Google ScholarĀ 

  • Singh, R. P., Lalmani, and U. P. Singh, Electron density distribution derived from low latitude whistler studies, Ann. Geophys., 11, 1011ā€“1017, 1993.

    Google ScholarĀ 

  • Singh, R. P., A. K. Singh, and D. K. Singh, Plasmaspheric parameters as determined from whistler spectrograms: a review, J. Atmos. Solar Terr. Phys., 60, 495ā€“508, 1998.

    ArticleĀ  Google ScholarĀ 

  • Singh, U. P., Whistlers/VLF Emissions and Related phenomena, Ph.D. Thesis, Banaras Hindu Univ., India, 1993b.

    Google ScholarĀ 

  • Singh, U. P. and R. P. Singh, Study of plasmasphere ionosphere coupling fluxes, J. Atmos. Solar Terr. Phys., 59, 1321ā€“1327, 1997.

    ArticleĀ  Google ScholarĀ 

  • Singh, U. P., A. K. Singh, Lalmani, R. P. Singh, and R. N. Singh, Hybridmode propagation of whistlers at low latitudes, Ind. J. Rad. Space Phys., 21, 246ā€“249, 1992.

    Google ScholarĀ 

  • Somayajulu, V. V., M. Rao, and B. A. P. Tantry, Whistlers at low latitude, Ind. J. Rad. Space Phys., 1, 102ā€“118, 1972.

    Google ScholarĀ 

  • Strangeways, H. J., A model for the electron temperature variation along geomagnetic field lines and its effect on electron density profiles and VLF paths, J. Atmos. Terr. Phys., 48, 671ā€“683, 1986.

    ArticleĀ  Google ScholarĀ 

  • Tarcsai, G., Candidate of science thesis, Hungarian Academy of Sciences, Budapest, 1981.

    Google ScholarĀ 

  • Tarcsai, G., Ionosphere-plasmasphere electron fluxes at middle latitudes observed from whistlers, Adv. Space Res., 5, 155ā€“158, 1985.

    ArticleĀ  Google ScholarĀ 

  • Tarcsai, G., P. Szemeredy, and L. Hegymegi, Average electron density profiles in the plasmasphere between L = 1.4 and 3.2 deduced from whistlers, J. Atmos. Terr. Phys., 50, 607ā€“611, 1988.

    ArticleĀ  Google ScholarĀ 

  • Tarcsai, G., H. J. Strangeways, and M. J. Rycroft, Error sources and travel time residuals in plasmaspheric whistler interpretation, J. Atmos. Terr. Phys., 51, 249ā€“258, 1989.

    ArticleĀ  Google ScholarĀ 

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Singh, R.P., Singh, U.P., Singh, A.K. et al. A case study of whistlers recorded at Varanasi (L = 1.07). Earth Planet Sp 50, 865ā€“872 (1998). https://doi.org/10.1186/BF03352180

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  • DOI: https://doi.org/10.1186/BF03352180

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