Remote probing techniques for inhomogeneous media

A technique is presented for remote probing a stratified medium using a spectral domain approach which differs from the conventional time-domain technique. The magnitude and phase of the field at the surfaces of the inhomogeneous medium when the probing wave is from the free space region of x less than zero is determined. The value of the measured surface makes it possible to compute the spectral domain counterparts which must be processed to determine the value of x. The computer storage and processing time for this procedure are within the capability of minicomputers. Several numerical results for profile functions are included to illustrate the utility of the method.