Segmenting datasets

Once the raw data has gone through QA/QC, then you must:

• Split the time series into shorter segments by considering:
  • time and length scales of turbulence
  • stationarity of the segment
  • Taylor's frozen turbulence hypothesis, etc ...

• Determine how (or if at all) you should replace missing samples
• Rotate the measurements into the background (mean) flow's frame of reference
• Use the concept of Reynolds decomposition to separate the turbulence signal from the total measured velocities