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10.2 Model Complexity

The grid spacing is and in the x and z direction, respectively. The number of time steps are and the computational effort is , or floating point operations per step. The number of individual shot records is . The n terms are about the same magnitude and is considerably less in value, typically around 25; is the operations count of the finite difference operator. The complexity of shot record modeling is and the complexity of zero-offset modeling is which is less.