Introduction

This page covers the image quality check for the OSIRIS imager and spectrograph, in both NGS and LGS mode.

• Launch PCU sequencer GUI
• Launch ASIM source GUI (only for NGS-AO)
• OSPEC NGS-AO
• OSPEC LGS-AO
• OSIMG NGS-AO
• OSIMG LGS-AO
• Put everyting in safe mode

Launch PCU sequencer GUI

To launch the PCU sequencer:

• Open a k1obsao@k1aoserver-new terminal
• Type: k1pcu_seq.dsp &

Launch ASIM source GUI (only for NGS-AO)

The Asterism Simulator (ASIM) source is needed to check the closed-loop image quality in NGS-AO mode for both the OSIRIS imager and spectrograph.

To launch the ASIM source GUI:

• Open a k1obsao@k1aoserver-new terminal
• Type: k1asim.dsp &

OSPEC NGS-AO

Procedure:

1. In k1aoserver-new:3 VNC desktop, select from the background menu:
   • If you are only checking the image quality in NGS-AO modde: NGS-AO Control → Start NGS calibrations
   • If you are checking the image quality in both NGS-AO and LGS-AO mode: LGS-AO Control → Start LGS calibrations
2. Keck I Calib → Calibration setup. If prompted:
   • Select OSIRIS
   • Select NGS-AO
3. Light Source Control → HEPA Off
4. Launch PCU sequencer GUI
5. Launch ASIM source GUI
6. Turn on an set initial illumination values for the ASIM source:
   • Turn on the source by clicking on the AS button (blue is ON)
   • Set the LGS coarse intensity slider to 10%
   • Set the LGS #1 value to 50%
7. Move the fiber to the optosiris named position using the PCU sequencer GUI.
8. In a napili or osiris terminal, type wait4ao off.
9. In the OOPGUI, configure a DDF to take a "dark":
   • Dataset = background
   • Object = background
   • AO type = LGS
   • LGS mode = No Laser
   • Imager settings Disabled (Spec only)
   • Filter = Kn3
   • Scale = 0.020"
   • Integraiton time = 5s
   • Click Send to Queue
10. In the OSIRIS Data Execution Client, click Start Next Dataset to expose
11. In OSIRIS Online Reduction GUI, specify the "sky" frame we just took,
    Calibration file → Specify a file → osiris → spec_raw
12. In the Aoacq GUI:
    • mR → 6.5
    • AO Mode: NGS-AO
    • Ref: OSPEC
    • Seeing: 0.00
    • Backgrounds: WFS: No
    • Run Setup bench
13. Select ospeclgs3 named position in the PCU sequencer GUI.
14. Set the centroid gain for the ASIM source by typing the following command in an IDL session in a k1obsao@k1aoserver terminal:

    IDL> setcngn4asim

    (NOTE: Centroid gain is approximately 0.55)
15. Record a new WFS background:
    • Light Source Control → BLOCK
    • ASIM → LGS #3 → 0%
    • WFS Intensity GUI → Record bkgd only
    (NOTE: No need to set LGS coarse intensity to 0% in the ASIM source GUI)
16. Keck I Calib → Light Source Control → 1% = ND2
17. Configure ASIM source to take open-loop (optional) and closed-loop images with OSIRIS:
    • If the ASIM source is not on (blue is ON), turn it on by clicking on the AS button
    • Set the LGS coarse intensity slider to 10%
    • Set the LGS #3 value to 50%
18. Check that counts in the WFS Intensity GUI are between 3,000 and 10,000. If counts are not within that range, adjust LGS #3 fine intensity and LGS coarse intensity values until sufficient average counts are obtained.
19. Setup OSIRIS and take an open-loop image (optional)
    • In a napili or osiris terminal:
    • Type: sgoi (This will use the same DDF to take a dataset.)
    • In the OOPGUI, configure a DDF:
      • Dataset = open_loop_check
      • Object = open_loop_check
      • AO type = LGS
      • LGS mode = No Laser
      • Imager settings Disabled (Spec only)
      • Filter = Kn3
      • Scale = 0.020"
      • Integraiton time = 5s
      • Click Send to Queue
      In the OSIRIS Data Execution Client:
      • Click Start Next Dataset to expose.
    • Check the open-loop image quality (optional)
      • Spec Quicklook → Tools → Peak fit → draw a box at least 5x5 spax around the point source.
      • Note the XFWHM,YFWHM. They should be around 2.3 spax.
    • Aoacq GUI → Acquire star
    • Once the AO loops are closed, freeze both the DM and DT loops:
      • Open a k1obsao@k1aoserver-new terminal
      • Type: m dmservo=0,0,0,-1,0,0
      • MAORI → AO Control → TT gain → 0
    • Select ospec named position in the PCU sequencer GUI.
    • Light Source Control → 10% = ND1
    • Setup OSIRIS and take a close-loop image:
      • In a napili or osiris terminal:
        • Type: sgoi (This will use the same DDF to take a dataset.)
      • Or in the OOPGUI, configure the same DDF:
        • Dataset = closed_loop_check
        • Object = closed_loop_check
        • AO type = LGS
        • LGS mode = No Laser
        • Imager settings Disabled (Spec only)
        • Filter = Kn3
        • Scale = 0.02"
        • Integraiton time = 5s
        • Click Send to Queue
        In the OSIRIS Data Execution Client:
        • Click Start Next Dataset to expose.
    • Check the closed-loop image quality
      • Spec Quicklook → Tools → Peak fit → draw a box at least 5x5 spax around the point source.
      • Note the XFWHM,YFWHM. They should be around 2.3 spax.
    • Open AO loops: MAORI → AO Control → LOOP → OPEN
    • Once the AO loops are open, unfreeze both the DM and DT loops:
      • Open a k1obsao@k1aoserver-new terminal
      • Type: m dmservo=1,0,0,-0.99,0,0

Back to introduction

OSPEC LGS-AO

1. If you have not done it yet:
   • On the k1aoserver-new:3 VNC desktop, select from the background menu: LGS-AO Control → Start LGS calibrations
   • Keck I Calib → Calibration setup. If prompted:
     • Select OSIRIS
     • Select LGS-AO
   • Light Source Control → HEPA Off
2. Light Source Control → 10% = ND1
3. In the Aoacq GUI:
   • mR → 9.6
   • AO Mode: NGS-ST
   • Ref: OSPEC
   • Seeing: 0.00
   • Backgrounds:
     • WFS: No
     • STRAP: No
   • Run Setup bench
   • If prompted, select Sodium dichroic
   • Acquire star
4. Keck I Calib → Light Source Control → BLOCK
5. Record a new WFS background:
   • Light Source Control → BLOCK
   • WFS Intensity GUI → Record bkgd only
6. Keck I Calib → Light Source Control → 10% = ND1
7. Aoacq GUI → Acquire star
8. MAORI → AO Control
   • TT gain → 0.05
   • DM gain → 0.1
9. Setup OSIRIS and take a close-loop image.
   • In a napili or osiris terminal:
     • Type: sgoi (This will use the same DDF to take a dataset.)
   • Or in the OOPGUI, configure the same DDF:
     • Dataset = closed_loop_check
     • Object = closed_loop_check
     • AO type = LGS
     • LGS mode = No Laser
     • Imager Settings = Disabled (Spec only)
     • Filter = Kn3
     • Scale = 0.02"
     • Integraiton time = 2s
     • Click Send to Queue
     In the OSIRIS Data Execution Client:
     • Click Start Next Dataset to expose.
10. Check the closed-loop image quality. (Expect the PSF to show some astigmatism.)
    • Spec Quicklook → Tools → Peak fit → draw a box at least 5x5 pix around the point source.
    • Note the XFWHM,YFWHM. They should be around 2.3 pix.
11. On the the LBWFS Imag Acq GUI:
    • Change the integ(s) to 5.0 seconds
    • Click Loop
12. Manual LBWFS focus control. Read the focus value (mm) of the black curve (left Y axis) on the Low-Bandwidth Manager GUI and subtract the value from the position of the FCS stage. This can be done using one of the following two methods:
    • Option 1: SC GUI → WF (FCS) → obwf , update value in the green box and hit S
    • Option 2: On a k1aoserver-new terminal type:
      • s obwf to show the current FCS focus value
      • m obwf=new_value to move the FCS focus to the new position
    The black line on the Low-Bandwidth Manager GUI should be reporting near zero after the FCS move is sent. The focus is fine if the values are <0.15mm.
13. Close COG control on the Low-Bandwidth Manager GUI after correcting the focus and make sure to let it run for at least 10 iterations. Verify that the fast WFS COG updates on the Low-Bandwidth Manager GUI. Evaluate performance:
    • Take additional OSIRIS images. The image quality should still be acceptable after 10 iterations of the LWBFS COG control loop.
    • The reported RMS WFE (red plot in the Low-Bandwidth Manager GUI) should be ≤ 250nm after it converges. The value should improve with the COG control loop closed. If it fails to converge either the configuration is wrong, e.g. insuficient light in the LBWFS, or the calibration is wrong.
14. Once you are done:
    • Hit HALT on the LBWFS Imag Acq GUI
    • Uncheck the Focus ctrl and cog ctrl boxes on the Low-Bandwidth Manager GUI
15. Open AO loops: MAORI → AO Control → LOOP → OPEN

Back to introduction

OSIMG NGS-AO

Procedure:

1. In k1aoserver-new:3 VNC desktop, select from the background menu:
   • If you are only checking the image quality in NGS-AO modde: NGS-AO Control → Start NGS calibrations
   • If you are checking the image quality in both NGS-AO and LGS-AO mode: LGS-AO Control → Start LGS calibrations
2. Keck I Calib → Calibration setup. If prompted:
   • Select OSIRIS
   • Select NGS-AO
3. Light Source Control → HEPA Off
4. Launch PCU sequencer GUI
5. Launch ASIM source GUI
6. Turn on an set initial illumination values for the ASIM source:
   • Turn on the source by clicking on the AS button (blue is ON)
   • Set the LGS coarse intensity slider to 10%
   • Set the LGS #3 value to 50%
7. In the Aoacq GUI:
   • mR → 6.5
   • AO Mode: NGS-AO
   • Ref: OSIMG
   • Seeing: 0.00
   • Backgrounds: WFS: No
   • Run Setup bench
8. Select osimglgs3 named position in the PCU sequencer GUI.
9. Set the centroid gain for the ASIM source by typing the following command in an IDL session in a k1obsao@k1aoserver terminal:

   IDL> setcngn4asim

   (NOTE: Centroid gain is approximately 0.55)
10. Record a new WFS background:
    • Light Source Control → BLOCK
    • ASIM → LGS #3 → 0%
    • WFS Intensity GUI → Record bkgd only
    (NOTE: No need to set LGS coarse intensity to 0% in the ASIM source GUI)
11. Configure ASIM source to take open-loop (optional) and closed-loop images with OSIRIS:
    • If the ASIM source is not on (blue is ON), turn it on by clicking on the AS button
    • Set the LGS coarse intensity slider to 10%
    • Set the LGS #3 value to 50%
12. Check that counts in the WFS Intensity GUI are between 3,000 and 10,000. If counts are not within that range, adjust LGS #3 fine intensity and LGS coarse intensity values until sufficient average counts are obtained.
13. Keck I Calib → Light Source Control → 0.1% = ND3
14. Setup OSIRIS and take an open-loop image (optional)
    • In a napili or osiris terminal:
      • Type: igoi (This will use the same DDF to take a dataset.)
    • Or in the OOPGUI:
      • Dataset = open_loop_check
      • Object = open_loop_check
      • AO type = LGS
      • LGS mode = No Laser
      • Imager Settings: Independent (imager only)
      • Filter = BrG
      • Repeats = 1
      • Coadds = 1
      • Integraiton time = 2s
      • Click Send to Queue
      In the OSIRIS Data Execution Client:
      • Click Start Next Dataset to expose.
15. Check the open-loop image quality
    • Imag Quicklook→ Tools → Peak fit → draw a box at least 5x5 pix around the point source.
    • Note the XFWHM,YFWHM. They should be around 4.5pix.
16. Aoacq GUI → Acquire star
17. MAORI → AO Control
    • TT gain → 0.1
    • DM gain → 0.1
18. Setup OSIRIS and take a closed-loop image
    • In a napili or osiris terminal:
      • Type: igoi (This will use the same DDF to take a dataset.)
    • Or in the OOPGUI, configure the same DDF:
      • Dataset = closed_loop_check
      • Object = closed_loop_check
      • AO type = LGS
      • LGS mode = No Laser
      • Imager Settings: Independent (imager only)
      • Filter = BrG
      • Repeats = 1
      • Coadds = 1
      • Integraiton time = 5s
      • Click Send to Queue
      In the OSIRIS Data Execution Client:
      • Click Start Next Dataset to expose.
19. Check the closed-loop image quality. .
    • Imag Quicklook → Tools → Peak fit → draw a box at least 5x5 pix around the point source.
    • Note the XFWHM,YFWHM. They should be around 4.5 pix.
    Note that AO system has the loops closed on the LGS #3 source from the asterism simulator. Therefore the while light source will not be in the center of the OSIRIS imager detector. Also, the source from the asterism simulator does not emit in the infrarred. Therefore it will not be visible in the OSIRIS detector. Only the white light source with the ND3 filter will be.
20. Open AO loops: MAORI → AO Control → LOOP → OPEN

Back to introduction

OSIMG LGS-AO

1. If you have not done it yet:
   • On the k1aoserver-new:3 VNC desktop, select from the background menu: LGS-AO Control → Start LGS calibrations
   • Keck I Calib → Calibration setup. If prompted:
     • Select OSIRIS
     • Select LGS-AO
   • Light Source Control → HEPA Off
2. Light Source Control → 1% = ND2
3. Start the LBWFS Img Acq GUI, if it has not been started yet
4. In the Aoacq GUI:
   • mR → 12.7
   • AO Mode: NGS-ST
   • Ref: OSIMG
   • Seeing: 0.00
   • Run Setup Bench
   • If prompted, select Sodium dichroic
   • Acquire star
5. Record a new WFS background:
   • Light Source Control → BLOCK
   • WFS Intensity GUI → Record bkgd only
6. Keck I Calib → Light Source Control → 1% = ND2
7. Aoacq GUI → Acquire star
8. MAORI → AO Control
   • TT gain → 0.05
   • DM gain → 0.1
9. Setup OSIRIS and take a closed-loop image
   • In a napili or osiris terminal:
     • Type osirisGoi imag. (This will use the same DDF to take a dataset.)
   • Or in the OOPGUI, configure the same DDF:
     • Dataset = closed_loop_check
     • Object = closed_loop_check
     • AO type = LGS
     • LGS mode = No Laser
     • Imager Settings: Independent (imager only)
     • Filter = BrG
     • Repeats = 1
     • Coadds = 1
     • Integraiton time = 2s
     • Click Send to Queue
     In the OSIRIS Data Execution Client:
     • Click Start Next Dataset to expose.
10. Check the closed-loop image quality. (Expect the PSF to show some astigmatism.)
    • Imag Quicklook → Tools → Peak fit → draw a box at least 5x5 pix around the point source.
    • Note the XFWHM,YFWHM. They should be around 4.5 pix.
11. On the the LBWFS Imag Acq GUI:
    • Change the integ(s) to 5.0 seconds
    • Click Loop
12. Manual LBWFS focus control. Read the focus value (mm) of the black curve (left Y axis) on the Low-Bandwidth Manager GUI and subtract the value from the position of the FCS stage. This can be done using one of the following two methods:
    • Option 1: SC GUI → WF (FCS) → obwf , update value in the green box and hit S
    • Option 2: On a k1aoserver-new terminal type:
      • s obwf to show the current FCS focus value
      • m obwf=new_value to move the FCS focus to the new position
    The black line on the Low-Bandwidth Manager GUI should be reporting near zero after the FCS move is sent. The focus is fine if the values are <0.15mm.
13. Close COG control on the Low-Bandwidth Manager GUI after correcting the focus and make sure to let it run for at least 10 iterations. Verify that the fast WFS COG updates on the Low-Bandwidth Manager GUI. Evaluate performance:
    • Take additional OSIRIS images. The image quality should still be acceptable after 10 iterations of the LWBFS COG control loop.
    • The reported RMS WFE (red plot in the Low-Bandwidth Manager GUI) should be ≤ 250nm after it converges. The value should improve with the COG control loop closed. If it fails to converge either the configuration is wrong, e.g. insuficient light in the LBWFS, or the calibration is wrong.
14. Once you are done:
    • Hit HALT on the LBWFS Imag Acq GUI
    • Uncheck the Focus ctrl and cog ctrl boxes on the Low-Bandwidth Manager GUI
15. Open AO loops: MAORI → AO Control → LOOP → OPEN

Back to introduction

Put everything in safe mode

• In a napili or osiris terminal, type m sfilter=drk
• Keck I calib → Dismiss
  • If AO loops are still closed, select Open loops
  • Select Turn HEPA ON
  • Put WFS in standby if night observations are going to start in the next one or two hours, select YES, otherwise select NO
  • Turn the white light OFF
  • Select Send PCU to home position
• Turn off the ASIM socurce. In the ASIM source GUI click on the AS button (gray is OFF)
• Select Positions
• In the background menu NGS-AO Control → Stop most NGS-AO Software or LGS-AO Control → Stop most LGS-AO Software

Back to introduction