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FIZIKA A 9 (2000) 4 , 187-192
 
SOME STUDIES ON THE VARIATION OF ELECTRON COLLISION FREQUENCY AND
ABSORPTION COEFFICIENT WITHIN THE ANISOTROPIC ATMOSPHERE
S. S. DEa, M. DEa, S. K. DUBEYa, and R.
BANDYOPADHYAYb
aCentre of Advanced Study in Radio Physics and
Electronics,
University of Calcutta, Calcutta 700009, India
bDepartment of Mathematics, University of Jadavpur, Calcutta
700032, India
Received 23 March 1999; revised manuscript received 11 December 2000
Accepted 12 February 2001
The analytical form of absorption index appropriate to a certain range of height of the
upper atmosphere plasma medium during ordinary wave propagation under quasi-transverse
approximations has been utilized to develop an integral equation through
Wentzel-Kramers-Brillouin method of solution. The integral equation is useful for the
determination of effective electron collision frequency. Numerical results are presented
graphically along with the results of some earlier work.
PACS numbers: 87.15.Rn, 87.50.-a
UDC 535.217, 539.21
Keywords: upper atmosphere plasma, wave propagation, absorption index, electron
collision frequency
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