Table 1.

Geometrical relations between the effective longitudinal width of an HSS along a given longitudinal sliceλ_HSS, eff, the associated effective width of the HSS boundary region λ_bd, eff, the peak velocity in the slice v_sl, max, the associated velocity gradient across the boundary region , the overall longitudinal width of the HSS λ_HSS, the HSS boundary region λ_bd, the displacement of the slice φ to the center of the HSS, the maximum velocity of the HSS v_f, and the velocity of the slow solar wind v_s.

		For 0.5 λHSS − φ ≥ λbd	For 0.5 λHSS − φ <  λbd
λHSS, eff	=
λbd, eff	=		0.5 λHSS, eff
vsl, max	=	vf
	=