FDNS identifies anomalous amplitudes in narrow and/or specific (low – high) frequency bands. It is a data adaptive tool that can be performed over specific window lengths and therefore has no adverse effect on the data. Many noise techniques (multi-channel) can have an adverse effect on HTI anisotropy. Due to the adaptive nature of FDNS the approach is “anisotropy friendly”.
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This noise tool is very effective in removing swell noise, seismic interference, noise bursts, spikes, ground roll and other types of random or coherent noise. Optionally, it can also be used to restore weak amplitudes that occur across certain channels.