TITLE: 11/09 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 145Mpc
INCOMING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 13mph Gusts, 10mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.51 μm/s 
SHIFT SUMMARY:
LHO's IFO H1 has been locked for 14+ hours.
I did drop us from Observing at 5:46 to change a Violin damping setting that was being turned off by the Violin Damping Guardian.
Took the Violin Guardian to Damping on simple. Set the Damping that I wanted for ITMX Mode2: gain to -15, then selected Damping Violins full Power.
Got back to Observing at 5:47 UTC. 
This setting seems to work wonderfully! IXm2 is dropping like a rock & the DCPD's are converging nicely.
Wind forcast looks great for the night.

LOG:
No Log

TITLE: 11/09 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 13mph Gusts, 9mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.51 μm/s 
QUICK SUMMARY:

H1 has been locked for 9+  hours, everything seems to be running well.
Wind forcast looks great as well!

TITLE: 11/08 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 147Mpc
INCOMING OPERATOR: Tony
SHIFT SUMMARY:

IFO is in NLN and OBSERVING as of 15:26 UTC (9 hr lock!)

IFO was locked for the entire shift. CAL sweep was done after SE standdown in coordination with LLO (alog 88016)

5 2nd Sat tours went great!

LOG:

None

Ran a successful coordinated CAL sweep with LLO. We waited ~1hr after the SE standown so sweep was done ~12:15 PM Local

BB Start: 1446668440

BB End: 1446668752

Simulines Start: 1446668866

Simulines End: 1446670223

2025-11-08 20:50:06,504 | INFO | It is SAFE TO RETURN TO OBSERVING now, whilst data is processed.
2025-11-08 20:50:06,504 | INFO | Commencing data processing.
2025-11-08 20:50:06,504 | INFO | Ending lockloss monitor. This is either due to having completed the measurement, and this functionality being terminated; or because the whole process was aborted.
2025-11-08 20:50:42,733 | INFO | File written out to: /ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20251108T202728Z.hdf5
2025-11-08 20:50:42,741 | INFO | File written out to: /ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20251108T202728Z.hdf5
2025-11-08 20:50:42,746 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20251108T202728Z.hdf5
2025-11-08 20:50:42,751 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20251108T202728Z.hdf5
2025-11-08 20:50:42,756 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20251108T202728Z.hdf5
PST: 2025-11-08 12:50:42.885356 PST
UTC: 2025-11-08 20:50:42.885356 UTC
GPS: 1446670260.885356
 

Sat Nov 08 10:04:31 2025 INFO: Fill completed in 4min 28secs

TITLE: 11/08 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 3mph Gusts, 1mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.43 μm/s 
QUICK SUMMARY:

IFO is in NLN and OBSERVING as of 15:26 UTC

Wind is down and microseism looks to be coming down.

Coordinated CAL sweep today at 11:30 with LLO but otherwise plans are to keep observing!

TITLE: 11/08 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY:
H1 has been locked and Observing for my Entire shift! YAY!
Violins have come down aswell. I have had 0 issues all night.
Wind forcast looks great for over night & secondary microseism seems to be falling.
Looks like it may be a great weekend for Observing. 

LOG:
No log

TITLE: 11/07 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ibrahim & TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 20mph Gusts, 12mph 3min avg
    Primary useism: 0.05 μm/s
    Secondary useism: 0.61 μm/s 
QUICK SUMMARY:
H1 is currently in Nominal_Low_Noise @ 00:02:23 UTC. 
Observing reached at 00:03:27 UTC
An Initial_Alignment was ran just before this lock attempt.
The lock befoe this had Violins so high  they were "off the chart", but this lock the Violins seem only moderately rung up.

Notes: 
Sheila has written a script to step the OFI Temp, and would like it to be ran after calibration tomorrow if we have been locked all night.
 

TITLE: 11/07 Day Shift: 1530-0000 UTC (0730-1600 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Tony
SHIFT SUMMARY: Recovery from the Mexico earthquake this morning was fairly fast, but it left rung up violin modes that took hours to damp to the point that we could go to low noise. Once in low noise we managed to Observe for over an hour before we lost lock from what seem to be an ETMX/DARM glitch. We ran an initial alignment and now we are powering up. The 0.3-1Hz seismic blrm is starting to come down, so that's a good thing.
LOG:

• 2106 Observing

I did a quick exploration to check if it is worth increasing the damping gain of the SR3 controllers to get better RMS performance now that we have installed LPY OSEM estimators. The exploration, math and results are summarized in T2500367. 

The main takeaway is that we might want to increase the Longitudinal and Pitch gains inside the EST blocks in order to try to reduce the pitch RMS for SR3. The pitch RMS is dominated by the 0.6-0.7 Hz resonances cross-coupling from longitudinal.

The suggested change is to increase the estimator damping gain from -0.8 up to -3 for both longitudinal and pitch. This change will retain 50% of the old OSEM-only damping OSEM noise contribution. We don't recommend going beyond -3 for fear of making any controllers unstable.

If we wanted to implement a change this change, I think it would be wise to monitor witness signals to see how they change as we increase the gain, and ensure everything is working OK. 

I attach a few plots to show the calculated tradeoffs and noise budgets for the pitch degree of freedom of the bottom mass of SR3. The plots correspond to OSEM-only damping, so they don't reflect the reality of the estimator. Nevertheless, the important thing is that they show that we stand to benefit from increasing the pitch damping gain and squashing the 0.6-0.7 Hz resonances [1st figure] to reduce the M3 pitch RMS [second figure]. We couldn't do that with OSEM-only damping because the OSEM noise would eat us alive [3rd figure]. Now that we have estimators, we should increase the estimator-path gain and see what we can get away with. The details are in T2500367. 

Looks like we had a DARM/ETMX glitch that we survived, then 40 seconds later had another that we did not.

I changed the OFI temperature slowly while Robert and Matt were doing other commissoning.  We had only been locked for a bit over an hour when I started, so there is still some thermalization causing a downward drift in AS power, the steps related to OFI temp seem large enough to distinguish. 

For the last point, the thermistor had been at 35C for 30 minutes but temperatures were still moving when we lost lock. 

After damping violins all morning, we are finally back to observing. Violins are still high and I'm trying to damp a bit faster on a few of them vs their nominal gains.

Fri Nov 07 10:13:42 2025 INFO: Fill completed in 13min 39secs

Gerardo confirmed a good fill curbside.

TITLE: 11/07 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Earthquake
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 10mph Gusts, 8mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.75 μm/s 
QUICK SUMMARY:

IFO is LOCKING at INITIAL_ALIGNMENT

We had a very local EQ during the no-call time on OWL (alog 88001) that tripped the following watchdogs: ISI EY ST1, ISI EY ST2, ISI IX ST1, ISI IX ST2, ISI IY ST1, ISI IY ST2, SUS IX, SUS IY, SUS EY, IX HW WD. IY HW WD, ISI HAM1, SEI ISI IX SW, SEI ISI IY SW, HEPI IX, HEPI IY.

Richard, who was on site, untripped them before shift start.

Just started an initial alignment and now watching out for SRY and IM issues that have happened before during violent WD tripping EQs.

Hoping for a smooth day of OBSERVING

We lost lock and several suspension have tripped from a 5.7 from Northern Mexico. There are DACKILLs on both the ITMs, this needs a model restart I believe to fix, we are going to be DOWN for the rest of the OWL shift at least. I'll call out for help in a bit, after 6.\

The microseism is also increasing, so I'm not so sure we'd be able to relock.