Anisotropy and polymodal distribution of IMF fluctuations

The IMF statistical characteristics, depending on duration of the averaging intervals, are studied based on the ACE spacecraft measurements. The distributions of the induction (B) vector directions and the estimates of the variance and excess coefficient of the vector components are presented. The polymodal model of the density distribution function of the vector (B) component variations is proposed. The parameters of this model, which make it possible to approximate empirical distributions accurate within several hundredths of percent, are presented.