UT 20230902: Restart Night#1



Night Info

For the night of: Fri, 2023 Sep 1 ---> Sat, 2023 Sep 2
Local midnight = 2023 Sep 2,  7 hr UT, or JD 2460189.792
Local Mean Sidereal Time at midnight =  22 25 09.1

Sunset ( 1000 m horizon):   18 49 MST; Sunrise:   5 50 MST
Evening twilight:  20 09 MST;  LMST at evening twilight:  18 34
Morning twilight:   4 30 MST;  LMST at morning twilight:   2 56
12-degr twilight: 19 39 MST -->  5 00 MST; night center:   0 20 MST

Moonrise:  20 00 MST   
Moon at civil midnight: illuminated fraction 0.926
2.2 days after full moon, RA and dec:   0 43 54,  +2 33.9

The sun is down for 11.0 hr;  8.3 hr from eve->morn 18 deg twilight.
Bright all night (moon up from evening to morning twilight).

Weather:

UT20230901 Weather:

Heavy rain is predicted. Bladders remain on the telescope. No chance to open.
UT20230902_Weather.png

Staff

  • OSA: Josh Williams
  • ISA/SO: Jenny Power
  • ECD Coordinator: Jenny Power
  • Special Guests: Olga, HeeJoo, Yang

Night Plan

Closed Dome Plan

  1. DONE MODS IMCS TTF zero points
    1. Contingent on repairs to MODS1 quadcell issues - Issue persists but Olga took measurements manually
    2. Telescope at 60deg and LDG/RDG = 207/195
  2. MODS Focus check
    1. Check camera focus settings using sieve and pinhole masks
      1. Priority: DONE Dual Grating, DONE Red Grating, Dual Imaging, DONE Red Imaging
      2. As time permits: Blue Grating, Blue Imaging, All Prism modes.
      3. Scripts located in /home/lbto/modseng/modsScripts/Testing/MODSfocus
        https://wiki.lbto.org/Instrumentation/MODSFocus
  3. DONE TMS Checkout and verification (2hr)
    1. Adjusting the elevation.
    2. Moving the primary mirror while closely monitoring TMS data.
    3. Check channel strengths and shutter operability
    4. Channel Dropping Test
  4. DONE LBC Swingarm repeatability test (4hr)
    1. TMS checkout must be completed first
    2. The procedure is just sketched out below…
      1. Power on TMS lasers
      2. As lbto@obs1,2 or robs, or as telescope@robs, bring up TCSGUI and from it, IIF, PSF and OSS GUIs
      3. Configure the telescope for the LBCB and LBCR (usually ask someone on the mountain)
      4. Authorize the LBCs (use IIFGUI -> Control -> IIF Control -> select LBCB and LBCR in the pull-down menus and then click Authorize.
      5. Click collimate on the PSF GUIs
      6. With the LBCs deployed, take a TMS reference on both SX and DX sides:
        1. open an terminal window as user telescope on robs
        2. cd /lbt/lbto/supportscripts/MetrologySupport/
        3. ./lbc_set_tms_offset.py -s 2
        4. repeat at least twice to get a few references
      7. Use the OSS GUI to retract the swing arms and then deploy them again (screenshot can be added…)
      8. Go back to step 5
      9. Repeat steps 6-8 about 9 or 10 times.
  5. Closed Dome Test Preset tests
    1. LBC - Track
    2. MODS - Track, Acquire, Active (fake guide star)
  6. SX Flat optimization with LBTI WFS
    1. Configure the telescope for LBTI (can not be done in parallel to moving telescope or swingarm tasks)
    2. Requires stow mins in, on oil, dark chamber, argos source deployed
    3. Acquire the argos source with the LBTI WFS, close the loop. Save a new flat. Rinse and repeat
  7. MODS reference Calibrations: Contingent on repairs to MODS1 quadcell and completion of tasks 1 & 2
    • Telescope at zenith, lights off for all but the lamps. Take these as able, but try to get through the (1) BIases, (2) Comparison lamps (grating), (3) Slitless pixel flats and (4) Imaging flats and then the dual grating slit flats.
    • Estimated time for (1)-(4) is about 3 hours. (Estimates from /lbt/lbto/mods/howlong.py)
    1. Biases: 25 min
      • 8K — 9 min
      • 3K — 6 min
      • 4K — 6 min
      • 1K — 4 min
    2. Slitless pixel flats: 51 min
      • dual - 20 min
      • red - 11 min
      • blue - 20 min
    3. Comparison lamps: 25 min
      • dual - 8 min
      • red - 7 min
      • blue - 8 min
    4. Imaging flats: 71 min
      • dual - 35 min
      • red - 19 min
      • blue - 17 min
    5. Slit flats:
      • Dual (113 min, w/o 0.3")
        • 0.6" - 20 min
        • 0.8" - 19 min
        • 1" - 19 min
        • 1.2" - 19 min
        • 2.4" - 18 min
        • 5" - 18 min
        • 0.3" -
      • Red (67, w/o 0.3")
        • 0.6" - 12 min
        • 0.8" - 12 min
        • 1" - 12 min
        • 1.2" - 12 min
        • 2.4" - 12 min
        • 5" - 7 min
        • 0.3"
      • Blue (81, w/o 0.3")
        • 0.6" - 14 min
        • 0.8" - 14 min
        • 1" - 14 min
        • 1.2" - 13 min
        • 2.4" - 13 min
        • 5" - 13 min
        • 0.3" - 15 min
    6. Comparison lamps (prism = prlamps)
      • 23 min total - good check on whether all the lamps are working.
        • dual - 8 min
        • red - 7 min
        • blue - 7 min


Night log

https://docs.google.com/document/d/1MagGpSJLme0GyS7nRe2B9mAEdPYiIUOUwm264lp4sQE/edit?usp=sharing

Olga took IMCS TTF measurements manually as the quadcell drops on MODS1 blue continue. Some issues to start with the TMS computer. Josh and Jay were able to hard cycle it and we were up and running. We had an issue with the tms reference loop script hanging. After a restart of the TMS PC this issue appears to have resolved itself. Uncertain if this occurred because TMS was started while primaries were down or another issue.

The TMS functional check was completed and it is now ready for operations. On the Dx side, we have 10 active channels (3-4-3 configuration), while the Sx side has 7 active channels (2-2-3 configuration). Notably, we identified two missing channels on the Sx side: ch 19 and 25. During a low elevation test at 30 degrees, no additional missing channels were observed. We also ran channel-dropping software and found no suspicious pose jumps.

The Swingarms repeatability test was completed. We also ran through the red modes of MODS to gather focus data.

-- JenniferPower - 01 Sep 2023 *
Topic revision: r5 - 02 Sep 2023, JenniferPower
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