Set FFT Sampling Parameters

Use the Set FFT Sampling Parameters option (FFTSAMP GX) to define the channel data sampling parameters for 1D FFT.

Set FFT Sampling Parameters dialog options

Distance increment	Enter the required distance increment. If not specified, the nominal data spacing will be used. Script Parameter: FFTSAMP.SAMPINCR
Interpolation method	Select the interpolation method: Linear, Minimum Curvature, or Akima. The default is Minimum Curvature. Script Parameter: FFTSAMP.METHOD

Application Notes

Run this GX to ensure the input data is properly sampled for 1D FFT.

If your data has variable spacing between samples (e.g., ground-based surveys), the default Minimum Curvature interpolation method may introduce artifacts in the filtered output.

If this occurs, try one of the following:

• Change the interpolation method to Linear.

• Specify a distance increment appropriate for your data.

These adjustments will help prevent artifacts from occurring.