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Conclusion

The subtraction and filtering methods are two different approaches for attenuating the noise present in seismic data. These two methods effectively approximate the covariance operator with a single filter, for the filtering approach, or a projection filter, for the subtraction method. The projection filter seems to improve (1) the conditioning of the Hessian and (2) the filtering properties of the covariance operator. Therefore, subtracting the noise might be the method of choice whenever possible.


next up previous print clean
Next: REFERENCES Up: Guitton: Signal/noise separation Previous: A 3-D field data
Stanford Exploration Project
7/8/2003