Open Access
Table 1.
WFS characteristics.
| LS | TS | Off-axis | Off-axis | Off-axis | |
|---|---|---|---|---|---|
| #1 | #2 | #3 | |||
| Pixels | 2402 | 1282 | 1282 | 1282 | 1282 |
| Readout | 0.25 | 0.30 | 0.50 | 0.50 | 0.38 |
| noise (e−) | |||||
| Pixels per | 302 | 162 | 162 | 162 | 162 |
| subaperture | |||||
| Pixel scale (″) | 0.65 | 0.24 | 0.28 | 0.26 | 0.28 |
| Total field | 19.5 | 3.84 | 4.48 | 4.16 | 4.48 |
| of view (″) |
Notes. All WFS have 7 subapertures across the pupil diameter corresponding to 36 illuminated subapertures. TS is the on-axis NGS WFS and LS is the on-axis LGS WFS. The ANDOR cameras for the NGS WFS are iXonEM 860 EMCCDs and the LS camera is an electron-multiplied OCAM2S camera (Gach et al. 2014).
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