Multifrequency spectra of solar brightness temperature derived from eclipse observations |
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| Authors: | S K Alurkar R V Bhonsle S S Degaonkar O P N Calla G Raju |
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| Institution: | (1) Physical Research Laboratory, 380009 Ahmedabad;(2) Space Application Centre, 380053 Ahmedabad |
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| Abstract: | Changes in solar radio-brightness temperature were derived at 2.8,19.3 and 22.2 GHz from the observations of radio flux during
the total eclipse of 1980 February 16. High-resolution MEM spectra of the brightness temperature fluctuations at the three
frequencies showed periodicities ranging from 3.5 min to 128 min. Between 3.5 min and 14.6 min there are several periodicities
of comparable significance common to the three operating frequencies. If the corresponding variations in brightness temperature
are assumed to result from spatial variations in the solar radio emission, the observed periodicities imply scale sizes in
the range 76000 km to 320000 km. |
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| Keywords: | Sun radio brightness temperature maximum entropy method |
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