Step 1: Time resampling

One of the early steps is to extend the time-frequency bandwidth of the data. Although there may be no intention of going out beyond Nyquist, it is prudent to begin by resampling the data in time at least by a factor of two, and by an amount such that the new Nyquist is greater than three times the temporal frequency seperating the aliased and non-aliased regions. If this resampling is carried out in the frequency domain, then the traces should be predicted out from both ends for several cycles, or tapered in amplitude at each end.