FIZIKA A 9 (2000) 4 , 187-192

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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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