Journal of Statistical Physics, Vol. 58, Nos. 3/4, 1990. p. 485-501.
It is shown by numerical simulations for a random, one-dimensional surface defined by the equation x3 = xi(xl), where the surface profile function xi(x1) is a stationary, stochastic, Gaussian process, that the transverse correlation length a of the surface roughness is a good measure of the mean distance between consecutive peaks and valleys on the surface...