Effect of cyclic variations in solar magnetic fields on characteristics ofinterplanetary medium

Yearly averages of dynamical parameters of the solar wind and interplanetar y magnetic field, as well as their determination errors, are obtained from the data of an electronic version of King's catalog. With these data in use , 11-year cycles of all the characteristics of the interplanetary plasma an d their connection with cycles of different solar magnetic fields were anal yzed. Differences in the cycles of principal characteristics of the interpl anetary medium are demonstrated by this analysis. Attention was given to sy stematic errors in determination of plasma density before the beginning of the 1970s and to the inadequacy of variations in the vector of the initial interplanetary magnetic field and its components.