Abstract
Application of the standard parabolic wave equation to solve real problems requires a clever selection of the reference wavenumber k0. An extended parabolic equation, earlier developed [F. D. Tappert, The Parabolic Approximation Method (Springer‐Verlag, Berlin, 1977), Lecture Notes in Physics, Vol. 70, pp. 224–287], is re‐introduced. This parabolic wave equation has range refraction capability and is totally k0‐independent. The existing Implicit Finite‐Difference (IFD) model was applied to test the range refraction parabolic equation. Results compare favorably with known solutions for weakly range dependent environments, but yield significant corrections for propagation through strong oceanic fronts. [Work supported by NUSC.]
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