Abstract
Discrete chorus emissions observed for the first time at the low latitude ground station Bichpuri, Agra (geomagnetic lat. 17°12′ N, L∼1.1) are reported here. The emissions are of the riser type and occurred in the narrow frequency range 1.7–3 kHz. We show that these emissions are generated in the equatorial plane near L = 1.2 as a result of cyclotron resonance between whistler mode waves and the inner radiation belt relativistic electrons of energy 3–5 MeV, and propagated to the low latitude ground station under the influence of the horizontal density gradients of the equatorial anomaly.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Helliwell, R. A. Whistlers and Related Ionospheric Phenomena (Stanford University Press, 1965).
Rycroft, M. J. Radio Sci. 7, 811 (1972).
Dikshit, S. K., Somayajulu, V. V. & Tantry, V. A. P. Nature 230, 115 (1971).
Muzzio, J. L. R. & Angerami, J. J. J. geophys. Res. 77, 1157 (1972).
Tsurutani, B. T., Smith, E. J. & Thorne, R. M. J. geophys. Res. 80, 600 (1975).
Kimura, I. Radio Sci. 1, 269 (1966).
Imhof, W. L., Gaines, E. E. & Reagan, J. B. J. geophys. Res. 78, 4568 (1973).
Imhof, W. L. & Smith, R. V. Radiation Trapped in the Earth's Magnetic Field (ed. McCormac, B. M.) 100 (Reidel, Dordrecht, 1966).
Singh, B. J. geophys. Res. 81, 2429 (1976).
Kennel, C. F. & Petschek, H. E. J. geophys. Res. 71, 11 (1966).
Katz, L. Radiation Trapped in the Earth's Magnetic Field (ed. McCormac, B. M.) 130 (Reidel, Dordrecht, 1966).
Ashour-Abdalla, M. Magnetospheric Physics (ed. McCormac, B. M.) 241 (Reidel, Dordrecht, 1974).
Bullough, K., Hughes, A. R. W. & Kaiser, T. R. Magnetospheric Physics (ed. McCormac, B. M.) 231 (Reidel, Dordrecht, 1974).
Liemohn, H. B. J. geophys. Res. 72, 39 (1967).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Singh, B., Prakash, R. & Singh, H. Discrete chorus emissions observed at a low latitude ground station. Nature 290, 37–39 (1981). https://doi.org/10.1038/290037a0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1038/290037a0
This article is cited by
-
Observation of discrete VLF emissions at Indian low-latitude ground station Srinagar (L = 1.28)
Indian Journal of Physics (2015)
-
Simultaneous observation of whistlers and emissions during a geomagnetically quiet period at low latitude
Astrophysics and Space Science (2011)
-
Very low frequency (VLF) chorus emissions: A topical survey
Surveys in Geophysics (1992)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
