Table 1
Results from the corrective algorithm tests performed in simulation.
| LWE # | Atmos. | LWE rms/ptv (nm) | LWE corr. basis | Final SR | Final rms (nm) |
|---|---|---|---|---|---|
| Yes | None | 90.5 ± 2.0% | 81 ± 9 | ||
| Yes | PTT | 90.6 ± 2.0% | 80±9 | ||
| Yes | PTT + PP | 90.1 ± 1.8% | 82±8 | ||
| 1 | Yes | 173/650 | None | 65 ± 3% | 173 ± 15 |
| 1 | Yes | 173/650 | PTT | 81 ± 5% | 122 ± 18 |
| 1 | Yes | 173/650 | PTT + PP | 85 ± 4% | 106±13 |
| 1 | Yes | 173/650 | Best fitting KL(a) | 88.3 ± 2.7% | 92±11 |
| 2 | Yes | 276/1350 | None | 31.2 ± 2.2% | 276±9 |
| 2 | Yes | 276/1350 | PTT | 61 ± 6% | 193±18 |
| 2 | Yes | 276/1350 | PTT + PP | 77 ± 6% | 140 ± 24 |
| 2 | Yes | 276/1350 | Best fitting KL(a) | 85.7 ± 2.7% | 107 ± 10 |
Notes. In Col. 3, entitled “LWE rms/ptv”, values correspond to the post-AO residual without LWE correction. SR values are in H band, after convergence of the LWE correction. Values after ± correspond to the standard deviation of the SR and rms on a 10-second sample. (a)“Best fitting KL” corresponds to the best possible correction in the 990 KL modes space. To obtain it, we projected the post-AO residuals (without LWE correction algorithm) from the phase space to the KL space. We applied the resulting best-KL fit on an additional DM in our simulated system. The additional DM corrects for the static LWE residuals when the original DM in the AO loop corrects for the atmosphere.
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