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Lateral velocity variation

Having approximated the square root by a polynomial ratio, Table [*].3 or Table [*].4 can be inverse transformed from the horizontal wavenumber domain kx to the horizontal space domain x by substituting $ \ (ik_x )^2 = \partial^2 / \partial x^2$.As before, the result has a wide range of validity for v = v(x,z) even though the derivation would not seem to permit this.

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