Abstract
The pre-sunrise phenomenon of a rapid drop in the maximum ionic density of F-layer followed by an increase in the semi-thickness and height of the layer and stratification is described. The phenomenon, which is found to occur prominently during periods of low or moderate solar activity and during winter months, is discussed in relation to the distortion of the overhead Sq. current system and vertical drift of ionization.
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References
Allen, C. W...J. Atmosph. Terr. Phys., 1953,4, 53.
Appleton, E. V. and Lyon, A. J.The Physics of ihe Ionosphere, Phys. Soc. Report, 1955, p. 20.
Bhargava, B. N...Nature, Lond., 1952,170, 983.
Bandyopadhyaya..J. Atmosph. Terr. Phys., 1959,16, 84.
Martyn, D. F...Proc. Roy. Soc., 1947(a),189, 241.
—————.. Ibid., 1947(b),190, 273.
—————.. Ibid., 1948,194, 429 and 445.
----- ..Proc. Conf. Ionosph. Phys., Edited by Katz, L. and Gerson N. C. (Part B), 1952, p. 69.
----- ..The Physics of the Ionosphere, Phys. Soc. Report, 1955, p. 214.
Marasigan, V...J. Atmosph. Terr. Phys., 1958,13, 107.
Maple, E., Bowen, W. A. and Singer, S. F.Nature, Lond., 1952,170, 1093.
Schmerling, E. R. and Ventrice, C. A.J. Atmosph. Terr. Phys., 1959,14, 249.
Van Allen, J. A. and Cahill, L. J.J. Geophys. Res., 1958,63, 270.
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Communicated by Dr. M. K. Vainu Bappu,f.a.sc.
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Bhargava, B.N., Subrahmanyan, R.V. A study of the pre-sunrise F-layer stratification at Kodaikanal. Proc. Indian Acad. Sci. 53, 227–238 (1961). https://doi.org/10.1007/BF03049187
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DOI: https://doi.org/10.1007/BF03049187