Figure 5.

Reconstructed ideal waves for the signal at a distance 24.65 mm where the signal-to-noise ratio (SNR) of 570 for the reconstruction is divided by 10 (dotted line) or multiplied by 10 (dashed line). The width of the reconstruction gets higher for a lower SNR, because the truncation frequency is reduced. The truncation frequency is shifted from 93 MHz (Table 1) to 80 MHz, and the spatial resolution degrades from 8.1 $\mathsf{\mu }\mathrm{m}$ (Table 2) to 9.3 $\mathsf{\mu }\mathrm{m}$. If a higher SNR is assumed than that provided by the experimental data, large artifacts caused by the high amplification of the fluctuations appear. In that case, proper reconstruction is not possible (dashed line). By such a SNR, the truncation frequency would be shifted from 93 MHz to 114 MHz, and the spatial resolution would be enhanced from 8.1 $\mathsf{\mu }\mathrm{m}$ to 6.6 $\mathsf{\mu }\mathrm{m}$.