Schematics of the structures and parameters defining the solar wind streams of interest. The uncolored (white) regions are plasma that is not of CH origin. The yellow regions mark the perturbed slow solar wind within the CIR, the red regions the perturbed part of the high speed stream (HSS_p) within the CIR and the gray regions give the rarefaction region, i.e., the unperturbed part of the high speed stream (HSS_u). From top to bottom: v: proton velocity, n: proton density; P: total pressure; B: total magnetic field strength; v_T: tangential velocity; T: proton temperature; O⁷⁺/O⁶⁺: O⁷⁺/O⁶⁺ ratio; S_p: specific proton entropy.