Right is by the phase shift method. Figure 8 shows the temporal spectrum of the original sigmoid model, along with the spectrum of the reconstruction via phase-shift methods. Top is the temporal spectrum of the model. Bottom is the spectrum of the reconstructed model. Figure 9 shows the effect of coarsening the space axis.
Synthetic data is generated from an increasingly subsampled model.
Left is the nearest-neighbor Kirchhoff method. Right is the phase-shift method. Top has 200 channels, middle has 100 channels, and bottom has 50 channels.