Modeling of the SCS. a) Triangle approximation of the corrugation. b) The relationship between the linewidth L and fold angle θ. c) The fold coefficient m and the coefficient of determination R2, as calculated from the linear approximation. d, e) Verification of the triangle approximation. The transition of f) amplitude d and g) half-wavelength w with respect to L. The measured values and proposed model equation are in good agreement.