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Title: Study of ionospheric irregularities from Kolhapur (16.4 deg N, 74.2 deg E)
Authors: Sharma, A.K.
Keywords: Solar activity
Solar Cycle
Fade rate
Ionospheric Scintillation
Cross-correlation function
Scintillation index
Issue Date: 2017
Citation: Journal of Atmospheric and Solar-Terrestrial Physics, 169, 16–22, doi: 10.1016/j.jastp.2017.12.019
Abstract: The paper reports night time observations of ionospheric irregularities made through amplitude scintillation of 251 MHz signal at Kolhapur (16.4 N, 74.2 E), an equatorial Appleton anomaly region using spaced antenna system. Monthly and night time percentage of occurrence of scintillations, during increasing solar cycle from January 2011 to August 2015, is discussed. The parameters such as-maximum cross-correlation function (CI), Fade Rate are also studied. The percentage occurrence is observed to be higher in post sunset period and during equinoctial months than in winter and summer months. Scintillation occurrence is observed to be suppressed during increasing solar activity. CI shows seasonal changes. Percentage of occurrence of CI 0.5 decreases with increase in solar activity and fade rate also shows solar activity dependence.
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