Guide stars | Tip-tilt | Low-order AO (21 Zernike) | High-order AO (66 Zernike) |

1 NGS | soartt | soar1 | soar1hm |

3 NGSs | soarttt | soar2 and soar4 | soar2h |

1 Rayleigh LGS | - | - | soar1hr |

3 Rayleigh LGSs | - | - | soar2hra |

1 Sodium LGS | - | - | soar1hs |

** Test points: ** 0 - un-compensated, 1 - on-axis. The positions of other
points are listed in the files as distance from the center of FoV and
position angle.

** Parameters: ** Strehl ratio, FWHM in X,Y directions, FWHE = 50% encircled
energy diameter, EDD = equivalent detectivity diameter (gives relative
gain in background-limited magnitude), Fried resolution (gives
increase in central PSF intensity compared to atmosphere with
infinite outer scale).

** Turbulence model ** for Cerro Pachon is specified by the
Fried parameter r0 (at 0.5 micron), by outer scale parameter L0, and
by the vertical distribution (7 discrete layers with altitudes and
relative energies listed). Influence of outer scale on FWHM of
un-compensated seeing images can be seen in soartt.txt.

** Simulations ** were done with the modal covariance code
(IDL) and approximate PSF-estimation procedure. The cases of several
guide stars (natural, laser, mixed) and several deformable mirrors can
be treated. By changing the test points and weights, some optimization
of PSF over the field is possible.