• Power spectrum of brightness temperature fluctuations derived from solar eclipse observations at 2.8 GHz

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      https://www.ias.ac.in/article/fulltext/jess/092/01/0057-0061

    • Keywords

       

      Solar microwave flux; solar oscillations; solar eclipse measurements; power spectrum; brightness temperature fluctuations; maximum entropy method

    • Abstract

       

      In this paper we report on the MEM power spectrum analysis of brightness temperature fluctuations observed at 2.8 GHz during the total solar eclipse of 16 February 1980. The observed periodicities range from 3.5 min to 64 min. These periodicities may arise due to spatial and/or temporal variations in the solar radio emission. The observed periodicities imply presence of scale sizes ranging from 70,000 to 600,000 km assuming that the brightness fluctuations arise because of spatial variation only. On the other hand, if these fluctuations are due to temporal variation, the observed periodicities correspond well to predicted modes of solar global oscillations.

    • Author Affiliations

       

      S K Alurkar1 S S Degaonkar1 R V Bhonsle1

      1. Physical Research Laboratory, Ahmedabad - 380 009, India
    • Dates

       
  • Journal of Earth System Science | News

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