Interplanetary scintillation - preliminary observations at 103 MHz

Bhonsle, R. V. ; Alurkar, S. K. ; Sawant, H. S. (1977) Interplanetary scintillation - preliminary observations at 103 MHz Indian Journal of Radio and Space Physics, 6 . pp. 5-8. ISSN 0367-8393

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Stokes polarization parameters of linearly polarized ATS-6 radio beacon transmission at 40.016 MHz were recorded with a time-sharing radio polarimeter at Ahmedabad. The observed state of polarization showed quasi-periodic variations as a function of the orientation angle, which in turn, depends upon the total Faraday rotation in the ionosphere. The axial ratio was found to vary continuously from about 0.5 through zero to -0.5, and vice versa. These results are interpreted in terms of combination at the antenna of the direct and ground-reflected waves, taking into account their dependence on the orientation angle. It is concluded that for reliable polarization measurements a highly directive antenna with low side-lobe response is essential.

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Deposited On:28 Apr 2012 12:43
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