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Spectrum of average flux of the S-component of solar radio emission
Authors:M K Das Gupta  S K Sarkar
Institution:(1) Centre of Advanced Study in Radiophysics and Electronics, University of Calcutta, 92, Acharya Prafulla Chandra Road, 9 Calcutta, India;(2) Present address: Department of Physics, Calcutta University, 9 Cal, India
Abstract:Spectrum of average flux of the S-component of solar radio emission observed during the peak phase of the present solar cycle has been determined statistically. Daily values of the mean solar flux at 606, 1415, 2695, 4995 and 8800 MHz observed at the Sagamore Hill Solar Radio Observatory have been examined. The superposed epoch method (Chree analysis) has been used for determining the true nature of the S-component at all these frequencies. Spectrum has been obtained after elimination of the basic components at the respective frequencies. The important results obtained from the present statistical investigation are: (1) the basic component increases with frequency, (2) the S-component shows a maximum at 4995 MHz (sim6 cm), (3) the spectrum is independent of the phase of the 27-day cycle and (4) S-components at all the frequencies have slopes which are both more uniform and higher in the ascending phase than those in the descending phase of the 27-day cycle. In the descending phase slopes increase with frequency.
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