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| Region of interest | a1 | a2 | a3 | a4 | a5 | a6 | a7 | a8 | a9 |
|---|---|---|---|---|---|---|---|---|---|
| IRR (dB) (Plane-wave) |
1.3 | 1.1 | 1 | 1 | 5 | 14 | 16 | 18 | 20 |
| IRR (dB) (Synthetic aperture) |
1.2 | 1.2 | 1 | 1 | 3.5 | 10 | 16.2 | 14 | 14.5 |
