The Coefficient of Asymmetry of Radio-Source Interplanetary Scintillation

Details The Coefficient of Asymmetry of Radio-Source Interplanetary Scintillation The Coefficient of Asymmetry of Radio-Source Interplanetary Scintillation

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sosyr..39..333s&link_type=abstract

Solar System Research, Volume 39, Issue 4, pp.333-338

Physics

3

Scientific paper

It is proposed to use the coefficient of asymmetry of the distribution function of fluctuations of a scintillating source flux density as a parameter that characterizes interplanetary turbulent plasma. It is demonstrated that this parameter can be measured with a differential method and that its informative capacity is equivalent to that of the source scintillation index. A series of test observations of scintillations was performed with the Large Phased Array antenna of the Lebedev Institute of Physics, Russian Academy of Sciences, simultaneously with measurements of the source scintillation indices and coefficients of asymmetry. Comparative analysis of the measured quantities showed that the coefficient of asymmetry within a numerical coefficient equals the source scintillation index, normalized to the flux density of the scintillating component. The coefficient of asymmetry makes it possible to restore scintillation indices when the radio sources are weak and it is difficult to measure their mean flux densities, and, hence, it enlarges the number of observable scintillating sources and makes the exploration of interplanetary plasma by means of the mapping of scintillation indices more efficient.

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