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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 15, issue 6
Ann. Geophys., 15, 729–733, 1997
https://doi.org/10.1007/s00585-997-0729-3
© European Geosciences Union 1997
Ann. Geophys., 15, 729–733, 1997
https://doi.org/10.1007/s00585-997-0729-3
© European Geosciences Union 1997

  30 Jun 1997

30 Jun 1997

Characteristics of VHF radiowave scintillations over a solar cycle (1983−1993) at a low-latitude station: Waltair (17.7°N, 83.3°E)

P. V. S. Rama Rao, P. T. Jayachandran, P. Sri Ram, B. V. Ramana Rao, D. S. V. V. D. Prasad, and K. K. Bose P. V. S. Rama Rao et al.
  • Space Physics Laboratory, Department of Physics, Andhra University, Visakhapatnam-530 003, India

Abstract. The characteristics of VHF radiowave scintillations at 244 MHz (FLEETSAT) during a complete solar cycle (1983–93) at a low-latitude station, Waltair (17.7°N, 83.3°E), are presented. The occurrence of night-time scintillations shows equinoctial maxima and summer minima in all the epochs of solar activity, and follows the solar activity. The daytime scintillation occurrence is negatively correlated with the solar activity and shows maximum occurrence during the summer months in a period of low solar activity. The occurrence of night-time scintillations is inhibited during disturbed days of high solar activity and enhanced during low solar activity.

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