ryan.short@LIGO.ORG - posted 16:48, Monday 27 October 2025 (87777)
Ops Day Shift Summary
TITLE: 10/27 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY: Two lock acquisitions today, both of which involved pauses for some commissioning measurements, but otherwise they were automatic. Rode through an earthquake this afternoon using the high-gain ASC configuration, which very likely saved time with relocking afterwords. H1 has now been locked for 4 hours.
- 14:44 - Starting initial alignment
- 15:22 - Starting lock acquisition
- 16:57 - Reached NLN, starting commissioning
- 17:14 - Lockloss
- 19:43 - Reached NLN
- Mitigated 1 Hz ASC ringup, accepted SDFs, ran switch_nom_sqz_states script, touched up SQZ rejected pump fiber power - alog87771
- 19:54 - Observing
- 20:32 - Dropped observing for high-gain ASC to ride out EQ
- 21:17 - Observing
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 15:29 | FAC | Nellie | MY | N | Technical cleaning | 16:19 |
| 15:31 | FAC | Kim | MX | N | Technical cleaning | 16:19 |
| 15:31 | FAC | Tyler | X-arm | N | Tumbleweed inventory | 15:37 |
| 15:37 | FAC | Randy | MX | N | Caulking BTE | 19:31 |
| 17:58 | IAS | Jason | Opt Lab | N | Checking parts | 18:16 |
| 20:07 | ISC | Keita | Opt Lab | Local | ISS array work | 21:30 |
| 20:14 | ISC | Rahul | Opt Lab | Local | ISS array work | 21:30 |
| 21:20 | VAC | Gerardo, Jordan | MX | N | Collecting equipment | 21:56 |