Open Access
Table 1
Simulations parameters.
| Telescope “VLT” | ||
|---|---|---|
| Parameter | Value | Units |
| Telescope diameter | 8 | m |
| Obstruction ratio | 14 | percent |
| Sampling frequency | 1000 | Hz |
| Active actuators | 1364 | actuators |
| PWFS subapertures | 41 × 41 | apertures |
| PWFS modulation | 0 | λ/D |
| Photon flux 0/9 mag | 1.25 × 108/3.1 × 104 | photons/frame/aperture |
| DM coupling | 0.3 | percent |
| DM influence functions | “Gaussian” | … |
| WFS wavelength | 0.85 | μm |
| Science camera wavelength | 1.65 | μm |
| Telescope “ELT” | ||
| Telescope diameter | 40 | m |
| Obstruction ratio | 30 | percent |
| Sampling frequency | 1000 | Hz |
| Active actuators | 10556 | actuators |
| PWFS subapertures | 121×121 | apertures |
| PWFS modulation | 2 | λ/D |
| Photon flux 0th mag | 2.7 × 109 | photons/frame/aperture |
| DM coupling | 0.3 | percent |
| DM influence functions | “Gaussian” | … |
| WFS wavelength | 0.85 | μm |
| Science camera wavelength | 1.65 | μm |
| Atmosphere parameters | ||
| Fried parameter | 16 | cm at 500 nm |
| Number of layers | 3 | … |
| Layer altitudes | 0/4/10 | km |
 |
50/35/15 | percent (%) |
| Wind speeds | 10/26/35 | m/s |
| Wind directions | 0/45/180 | degrees |
| Lo (m) | 30/30/30 | m |
| PO4AO parameters | ||
| Planning horizon (H) | 4 | steps |
| Past DM commands (m) | 15 | commands |
| Past WFS measurements (k) | 15 | frames |
| CNN ensemble size | 5 | … |
| Dynamics iterations/episode | 15 | steps |
| Policy iterations/episode | 10 | steps |
| Training mini batch size | 32 | … |
| Fixed CNN parameters | ||
| Number of conv. layers | 3 | layers |
| Filter size | 3×3 | pixels |
| Padding | 1 | pixels |
| Activation functions | Leaky ReLU | … |
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