Open Access
Table 1.
Configuration used for the COMPASS AO simulations.
| Simulation configuration | |
|---|---|
| Pupil | ELT pupil (a) |
| Monolithic primary mirror | |
| six-armed 51 cm-thick spider | |
| Central obstruction 11.1 m | |
| Turbulence | Single ground layer |
| r0= {7.6–76.0} cm at 500 nm | |
| Outer scale L0= 25 m | |
| Wind speed |v| = 10 m.s−1 | |
| DM | 5352 actuators for the 6 shells (b) |
| Triangular pattern per shell | |
| 54 cm pitch | |
| ESO provided influence functions (c) | |
| Null coupling between actuators | |
| P-WFS |  |
| λWFS = 700 nm | |
| 95 × 95 sub-apertures | |
| No noise (photon and read-out) | |
| Target | λtar = 1100 nm |
| On-axis star | |
| Controller | Loop rate 500 Hz |
| No latency (except integration and hold) | |
| Linear modal integrator | |
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