Co-rotating Solar Wind Disturbances in Radio Sounding Data and Local Measurements

Abstract

In this paper, we present the results of two series of experiments on radio sounding of near-solar plasma by the signals of the Mars Express and Venus Express spacecraft in 2006 and Mars Express in 2008. The radio sounding data are compared with measurements of the proton concentration near the Earth's orbit on the Wind satellite. This analysis shows that the general nature of the temporal dynamics of disturbances observed in two series of measurements is qualitatively similar. The sequence of amplifications of fluctuations in the frequency and density of protons indicates that the observed disturbances are associated with co-rotating regions of interaction of solar wind flows of various velocities.