Table 1 Comparison of acquisition methods.
| Â | Â | Array elements | Number of signals | Pitch (mm) | Scan time | SNR (dB) | Data size (MB) |
|---|---|---|---|---|---|---|---|
Case 1 | FMC | 193 | 37249 | 0.155 | 42 min | 65.92 | 97.39 |
Sub FMC | 46 | 2116 | Â 0.650 | Â 2.5 min | 40.46 | 5.62 | |
Stage 1 | 10/15/30 | 1225 | 3/2/1 | 1.5 min | – | 3.29 | |
SPT-SMC | 46 | 2116 | 0.155 | 2.5 min | 65.93 | 5.60 | |
SED-SMC | 46 | 2116 | Varying | 2.5 min | 50.44 | 5.70 | |
Total SMC | – | 3341 | – | 4 min | – | SPT: 8.89, SED: 8.99 | |
Case 2 | FMC | 142 | 20164 | 0.155 | 23 min | 63.72 | 55.83 |
Sub FMC | 34 | 1156 | Â 0.650 | Â 77 sec | 36.52 | 3.23 | |
Stage 1 | 10/15/30 | 1225 | 2.25/1.5/0.75 | 82 sec | – | 3.24 | |
SPT-SMC | 34 | 1156 | 0.103 | 77 sec | 69.96 | 3.18 | |
SED-SMC | 34 | 1156 | Varying | 77 sec | 52.28 | 3.10 | |
Total SMC | – | 2381 | – | 2.65 min | - | SPT: 6.42, SED: 6.34 |
