Re-Fid a Channel to a Distance Base

Use the 1D FFT > Advanced Settings > Re-Fid to Distance menu option (DISTFID GX) to create a distance-based channel from a fiducial-based channel.

Re-Fid to Distance dialog options

Channel to re-fid	Select the data channel to be re-sampled. Script Parameter: DISTFID.IN
Distance sampled output channel	Specify the new distance-based channel. Script Parameter: DISTFID.OUT
Distance increment	Enter the required distance increment. If not specified, the nominal data spacing will be used. Script Parameter: DISTFID.INCR
Maximum distance gap to interpolate	Define the maximum distance gap to interpolate. Gaps larger than this value will not be interpolated. Default: 1.5 × nominal data increment Script Parameter: DISTFID.GAP
Interpolation method	Choose the interpolation method: Minimum Curvature, Linear, or Akima. Script Parameter: DISTFID.METHOD

Application Notes

This GX uses a channel named _Distance as the reference for distance. If this channel does not exist, the X and Y channels are used to create a _Distance channel, which contains the cumulative down-line distance starting at 0.

If you prefer to use a different reference channel (e.g., X or Y directly), copy the desired channel to a channel named _Distance before running DISTFID GX.