Study of the near-solar plasma by the dispersion interferometers aboard the Venera-9 and -10 satellites

Physics

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Cosmic Plasma, Interferometry, Interplanetary Medium, Satellite Observation, Solar Spectra, Venera Satellites, Electron Density (Concentration), Nonuniform Plasmas, Solar Wind, Spectrum Analysis

Scientific paper

In March-May, 1976, the relative positions of the Venera-9 and -10 spacecraft, the sun, and the earth were such that the dispersion interferometer experiment could measure the variations of the total electron content along a spacecraft-earth path in the immediate vicinity of the sun. Strong variations were recorded, indicating a wide spectrum of electron concentration fluctuations in the medium studied. Spectra of plasma inhomogeneities were constructed. In the region from 76-18.5 solar radii from the sun in the frequency range 0.0001-2.5 Hz, the spectrum of near-solar plasma inhomogeneities has a power-law character with spectral index of 3-4 close to the value for the Kolmogorov spectrum of index 11/3.

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