NGS-AO (required for both, NGS and LGS calibrations)

Setup the AO bench and close the loops:

1. On the svncserver2:3 VNC desktop, select from the background menu NGS-AO Control → Start NGS calibrations
2. Keck II Calib → Calibration setup. If prompted:
   • Select NIRSPAO
   • Select NGS-AO
3. SC GUI → SF (SFP) → obsfname → scam
4. Keck II Calib → Light Source Control
   • 0.01% = ND4
   • If HEPA still on, Click for HEPA OFF
5. Check that the AOACQ GUI is in simulator mode (Aoacq - vX.Y CLS SIMULATION MODE). Otherwise, start the AOACQ GUI in simulator mode. In a k2aoserver terminal as k2obsao:
   • Start IDL session
   • In IDL, aoacq , /sim
6. In the Aoacq GUI:
   • mR → 13.0
   • AO Mode: NGS-AO
   • Ref: AO SCAM
   • Seeing: 0.0
   • Background WFS: Auto
   • Run Setup bench
7. Aoacq GUI → Acquire star
8. MAORI → AO Control
   • TT gain → 0.1
   • DM gain → 0.1

Setup NIRSPEC and take closed-loop image with SCAM:

1. On the nspeceng VNCs:
   • EFS → Obs. Mode → Setup Only
   • EFS → Filter → FeII
   • EFS → GO
2. Monitor the setup progress on the NIRSPEC instrument control GUI and on the wait_wrapper popup terminal. Double check that:
   • The Fold mirror stays Out
   • The FEU flip stays In
   • The Pinhole stays Out
   • The Hatch stays Closed
3. Once the setup is completed, take a SCAM background image on a nirspec terminal with the following commands:
   • tint2 0.67 (shortest SCAM exposure time in seconds)
   • coadds2 1
   • goi2
4. Set the last image as background for Ginga. On the SCAM Ginga display NIRSPEC_SCAM → Use last as subtraction
5. Open the NIRSPEC hatch and take an image with SCAM:
   • NIRSPEC instrument control → Hatch → New value → Open → Apply
   • On a nirspec terminal, use the following command goi2

Check the closed-loop image quality by measuring the FWHM of the fiber source image on SCAM using the Pick tool on the SCAM Ginga display. The image quality is considered acceptable if the fiber image is not too elongated and the FWHM of the PSF as measured by the Pick tool is < 3.5 pix on SCAM. See example here of an acceptable closed-loop image on SCAM showing 3.1 pix FWHM (46 mas). Note, it is helpful to adjust the Cut levels on the Ginga SCAM display to something like low=0 and high=300.

Put NIRSPEC in safe mode: NIRSPEC instrument control → Hatch → New value → Closed → Apply

• If only need to checkout NGS, put AO in safe mode
• If also need to checkout LGS, go to additional checkout for LGS-AO

Additional checkout for LGS-AO

It is currently not possible to take a SFP fiber image with SCAM when AO is configured in NGS-ST mode, because the brightness required to get enough counts of the WFS with the sodium dichroic in the optical path saturates the SCAM.

Put AO in safe mode

• Close NIRSPEC hatch:
  • NIRSPEC instrument control → Hatch → New value → Open → Apply
• Keck II calib → Shutdown AO Bench
  • If AO loops are still closed, select Open loops.
  • Keep WFC in NORMAL if the bench will be used within the next hour. Otherwise, put WFC in STANDBY.
  • Put STRAP in STANDBY? Select No if the bench will be used within the next hour. Otherwise, select Yes.
  • Acknowledge popup message indicating OCAM2k will be warmed up by pressing OK.
  • Select Turn HEPA ON if none of the conditions specified in the popup message are fulfilled.
  • Turn AO light source off (select Yes in the popup message) if AO bench work is completed and there is no intention to resume work any time soon.
  • Answer Yes to send the SFP to the Telescope position if the AO bench needs to be prepared for night observing.
• If you need to "manually" move the SFP to the telescope position, in the SC GUI
  • SF (SFP) → obsfname → prehome (wait until INPOS)
  • SF (SFP) → obsfname → home (wait until INPOS)
  • SF (SFP) → obsfname → telescope
• In the case of NGS-AO calibrations, select on the background menu NGS-AO Control → Stop most NGS-AO Software
• In the case of LGS-AO calibrations, select on the background menu LGS-AO Control → Stop most LGS-AO Software