Correlation level between solar wind and magnetosheath plasma and magnetic field parameters

We conduct a statistical study of the correlation coefficients between solar wind and magnetosheath parameters using plasma and magnetic field data from THEMIS satellites. Correlation coefficients for high temporal resolution data are less than 0.5 in 70–80% of cases and remain the same for 30–40% of cases for 100-s smoothed data. The solar wind and magnetosheath parameters correlate better for larger solar wind density and interplanetary magnetic field magnitude values and for larger relative standard deviations of their parameters. Correlation level is higher in cases of quasi-perpendicular bow shock versus quasiparallel one. We consider correlation changes while magnetosheath satellite approaches the magnetopause and do not find correlation dependence on the satellite position inside the magnetosheath.