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Next: Balancing primaries and multiples Up: Discussion and conclusions Previous: Patch size

Non-stationary filter lengths

The length of the filter depends on the character of the noise model and the size of the patch. We found that, for matching the multiples, short filters (2 to 4 samples in each axes) worked well but for the ground-roll example a longer filter gave better results (27 samples in time and 2 in offset) because the nature of the noise and the signal were so different.