Analysis of radio wave frequency fluctuations in the circumsolar plasma: Galileo coronal sounding data

Spectral and correlation analyses of the frequency fluctuations of radio waves measured in the course of the radio sounding of the circumsolar plasma by the signals of the Galileo spacecraft in 1995–2002 are performed. The radial dependences of the fluctuation intensities are obtained, and disturbed plasma structures (similar to coronal mass ejections) that pass through the radio ray path are detected. The radio-sounding data are compared with the results of plasma measurements on the Wind satellite. A relationship between events in near-Earth space and the circumsolar plasma is established. The correlation of radio wave frequency fluctuations along different ray paths in the circumsolar plasma is studied. The exponents of the spatial spectrum of turbulence and the solar wind velocity are determined at different heliocentric distances.