Specifications
The main scientific performance requirements for Day 1 are:
| Mode | Single-conjugate correction |
| Wavelength | 1.0-2.5 micron, with a goal of 0.8-5 micron |
| Strehl Ratio | SR>=0.65 at 2.2 micron for a bright NGS on axis SR>=0.1 at 2.2 micron for a faint NGS (mR=14.5) |
| Range of operation | Seeing better than 1.5 arcsec FWHM at 500 nm Zenith angles 0º - 60º |
| Field of View (FoV) | 1.5 arcmin available to the science instrument 1.5 arcmin accessible for wavefront sensing |
| Observation time | At least 1 h exposure time on the science instrument |
| Non-sidereal operation | Continuous tracking of objects which act as their own guide source at non-sidereal rates limited only by the telescope tracking |
| Dithering | Offsets of 0.25 arcsec (goal 1.0 arcsec) without interrupting operation |
| Nodding | Ability to keep the loop closed while nodding the telescope at 1 arcsec per second (TBC) |
| Throughput | Throughput of wavefront corrector shall be at least 70% in the wavelength range from 1.0 to 2.5 micron with a goal of 70% in the range 0.8 to 5 micron |
| Emissivity | < 20% at 3.8 micron |
| Ghost images | Defocused ghosts: <1e-5 (except dichroic 1e-4) Focused ghosts: <1e-3 and located within 0.2 arcsec) |
| Upgrades | Facilitate upgrade to a multi-conjugate system having two deformable mirrors. Facilitate upgrade to the use of a single LGS and upgrade to the use of multiple LGS |