A new and simple approach to the space ergodicity problem is suggested. By averaging along an arbitrary horizontal straight line rather than by volume averaging, the spatial statistical characteristics of the phase of a wave normally incident on a randomly inhomogeneous plane-layered medium are obtained. In that case (in contrast to volume averaging), the regular wave properties are not masked. It is demonstrated that the spatial stochastic characteristics can be determined from time-average measurements only when the medium inhomogeneities drift at a constant horizontal velocity.
Department of Physics of Atmosphere, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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