Singh, A. K. and Narayan, D. and Singh, R. P. (1997) Weak-scattering theory for ionospheric scintillation. Il nuovo cimento C, 20 C (4). pp. 541-552. ISSN 1826-9885
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Abstract
The VHF scintillations recorded at Varanasi (geomag. lat.4147558N; geomag. long.4154 7E) are mostly weak scintillations. Using a thin phase screen model for ionospheric irregularities, under the approximation of weak-scattering theory, attempts have been made to evaluate theoretically the time evolution of the scintillation index, S4, for different models of electron densities. The present formulation is used to study the impact of turbulence strength, Cs , and its outer scale length L0 on the variation of the scintillation index S4 . The S4 index increases with the increase in spectral index n but decreases with increasing outer scale length L0. Diurnal, seasonal and solar-cycle variations of the S4 index have also been studied and it is found that S4 lies between 0.2 and 0.9 as the Sun passes through solar maxima to solar minima. The results are found to be in good agreement with those reported by other workers.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Meteorology; physics of the ionosphere |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.5 Meteorologia (Classificare qui l'atmosfera) (Classificare la previsione e le previsioni di specifici fenomeni meteorologici in 551.64; classificare la Micrometeorologia in 551.66) |
| Depositing User: | Marina Spanti |
| Date Deposited: | 06 Feb 2018 13:11 |
| Last Modified: | 06 Feb 2018 13:11 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/12111 |
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