Double Screen Transition Effects In Near Earth Plasma Turbulence Studying.

Solar wind observations by means of bi-static decametric radar formed by ground based facility and spacecraft allow studying a fine structure of solar wind plasma irregularities with resolution up to 40 km. Both spectral analysis and Hurst exponent methods were applied to the nine series resulting from scintillation of radio signal transmitted through double screen of turbulent layers of ionosphere and solar wind plasma. That was used to separate the signal components, which reflect influence of either Earth ionosphere or Solar wind. As a result of the analysis it has been resumed that the main contribution into interplanetary scintillation was supplied by a region of enhanced solar wind turbulence in the site of near Earth bow shock.