Abstract
By representing a wave field in terms of standard caustic integrals one obtains only a local asymptotic solution. Augmenting the standard integral by its derivatives with respect to external parameters (Kravtsov-Ludwig technique) renders the asymptotic uniformly valid, that is, applicable both at short and at long distances from the caustic. We introduce the concepts of transverse and longitudinal caustic scales to derive uniformly-valid applicability conditions for the asymptotic expressions.
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Kravtsov, Y.A., Orlov, Y.I. (1999). Uniform Caustic Asymptotics Derived with Standard Integrals. In: Caustics, Catastrophes and Wave Fields. Springer Series on Wave Phenomena, vol 15. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59887-6_5
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DOI: https://doi.org/10.1007/978-3-642-59887-6_5
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