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Abstract

The cross-spread is the basic subset of the orthogonal geometry (Fig. 1). It is a single-fold 3D dataset which is suitable for DMA (Vermeer et al., 1995). The midpoints of the traces contributing to the DMO result in an output point lie on a hyperbola (Fig. 2). In a constant velocity medium, there is always a point on the hyperbola which has illuminated the footpoint of the zero-offset trace in the output point. This is the point of stationary phase for the output point, The other traces along the hyperbola either contribute to the zone of stationary phase or to the flanks of the DMQ panel.

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/content/papers/10.3997/2214-4609.201408733
1996-06-04
2024-03-29
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