Shane AO  

Procedure: Hennawi Program

1. Preparatory to all science targets, derive new static mirror shape:
   • Ensure Loops open.
   • Ensure TUB = 74.0.
   • Execute ~/local/u/user/observers/lgs/scripts/on-axis.
   • In fieldsteer.tcl GUI:
     • Ensure LGS selected.
     • Disable Move Telescope and Auto Close Loops.
     • Select Back On-axis.
     • Enable Move Telescope and Auto Close Loops.
   • In ShaneAO loop control GUI:

     Ensure Operation mode is NGS.

   • Go to bright star nearby science target (e.g. _starDF).
   • Tune WFScam and TTCam rates appropriate to star.
   • Set Tweeter+woofer gain=0.1.
   • Close loops in NGS operation mode for a few cycles.
   • Actions... Shape... Save as flat.
   • Open loops.
   • Restore optimal Tweeter+woofer gain.
2. If a convenient nearby AO guide star is available (e.g. _starAO), then acquire star in Tip-Tilt mode only and field steer to science target:
   • Ensure Loops open.
   • Ensure TUB = 74.0.
   • Execute ~/local/u/user/observers/lgs/scripts/on-axis.
   • In fieldsteer.tcl GUI:
     • Ensure LGS selected.
     • Disable Move Telescope and Auto Close Loops.
     • Select Back On-axis.
     • Enable Move Telescope and Auto Close Loops.
   • In ShaneAO loop control GUI:
     • Ensure Operation mode is TT only.
   • Go to convenient star nearby science target (e.g. _starAO).
   • Tune WFScam and TTCam rates appropriate to star.
   • Close loops in TT only operation mode.
   • In fieldsteer.tcl GUI:
     • Ensure LGS selected.
     • Enable Move Telescope and Auto Close Loops.
     • Field steer to science target.
   • Set exposure parameters.
   • Via scriptproc.tcl GUI:
     • run Bxy script with 5 arcsec dithers (doing 4- or 5-point dither where desired).
3. If a guide star is NOT available, then acquire field directly in NGS mode. Telescope operator must find off-axis guide star and start guiding:
   • Ensure Loops open.
   • Ensure TUB = 74.0.
   • Execute ~/local/u/user/observers/lgs/scripts/on-axis.
   • In fieldsteer.tcl GUI:
     • Ensure LGS selected.
     • Disable Move Telescope and Auto Close Loops.
     • Select Back On-axis.
     • Enable Move Telescope and Auto Close Loops.
   • In ShaneAO loop control GUI:
     • Ensure Operation mode is NGS.
   • Telescope operator acquires field directly and confirms field with diagonal mirror in position 2, then selects an off-axis guide star with diagonal mirror in position 3.
   • Execute dither script(s):

     user@shimmy: /net/shred/local/u/user/observers/lgs/scripts...

     guider-dither.tcl <nexpose> (5 point dither pattern).

     guider-dither4.tcl <nexpose> (4 point dither pattern).

• To load known good mirror shape:

  ~/observers/lgs/saocon_setups/flat.sh

  or, load in the most recent shape or this known good shape(s) (e.g. /data/archive/tweeter_flat.fits.201710301115 and woofer_flat.fits.201710301115).

  ~/observers/lgs/saocon_setups/flat.sh cur

Change Log:

2018-01-27: Updated.

2017-11-28: Updated.

2017-11-06: First version.