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- W1988294037 abstract "A parabolic equation model requires a starting field; that is, the values of the field must be given as a function of depth at a fixed range. A desirable starting field must satisfy two requirements: (1) It should excite the propagating modes with the proper amplitudes; and (2) it should excite nonpropagating modes only to the extent that their effects can be filtered out with increasing range by the false bottom usually added under the ocean floor, which can more than double the depths involved. In practice, the usual approach is to use an easily computed result such as a Gaussian, filtered Gaussian, sine, or uniform ocean starting field. The false bottom is then increased to meet the second criterion. The advantage of the normal mode starting field is that it does not excite unwanted nonpropagating modes, which minimizes the need for the false bottom, which in turn reduces the running time of the model proportionally—once the starting field is computed." @default.
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- W1988294037 date "1987-05-01" @default.
- W1988294037 modified "2023-09-25" @default.
- W1988294037 title "Comparing effects of different starting fields for parabolic equation models" @default.
- W1988294037 doi "https://doi.org/10.1121/1.2024091" @default.
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