Existing algorithms for ray modeling in layered media become exceedingly complex and time- and memory-consuming for models with many interfaces and complicated ray codes (e.g., multiples).<br>Moreover, for multi-shot/multi-receiver modeling calculations become highly redundant because the same parts of the medium are crossed over and over again. We propose to overcome these problems by pre-computing and storing the four-parametric ray fields between adjacent interfaces in the form of two-way ray field maps in position/angle coordinates. Subsequently, this information is used to construct arbitrary ray codes. The maps provide the ray segments between the interfaces, while Snell's law is used to connect the segments. Arbitrary ray codes can thus be constructed quickly and without redundancy. An example of multiple prediction in a synthetic layered medium is shown to be in agreement with finite difference results.


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