- 15:45 (back 16:42) Jeff B to EX and EY (checking dust monitors and HEPI)
- 15:57 GRB short alert (turned on inject kill for 15 minutes. PEM injections were running)
- 16:00 PEM injections finished. Sensor correction OFF.
- 16:01 (back 18:22) Bubba, Scott, Chris, Tyler, Kyle to LVEA (for HAM 7/8 craning work)
- 16:02 (back 17:52) Vanessa to LVEA
- 16:07 (back 17:18) Karen to EY
- 16:12 (back 19:06) Gerardo to LVEA ( measuring and craning near BSC3)
- 16:16 ACE on site for the portable toilets
- 16:23 Lockloss
- 16:31 (back 16:47) Christina and Hugh to LVEA
- 16:50 Dave has taken EX ISC out of Dolphin
- 16:50 (back 17:26) Fil and Richard to EX (Powering down ISC IO chassis for noise hunting)
- 17:04 Hanford Fire Department are onsite to start a controlled tumbleweed burn along the X-arm (will be accompanied by Bubba and Jeff Jones)
- 17:06 (back 17:39) Ed to EX for Oplev centering
- 17:20 (back 17:42) Chrisina to MX and EX (to pick up paperwork)
- 17:23 (back 17:31) Hugh to LVEA (HAM6 looking for property)
- 17:32 Controlled burn started at EX
- 17:39 (back 18:05) Ed to EY for Oplev centering
- 17:42 Chrisina to EY (to pick up paperwork)
- 17:51 LN2 delivery to MX
- 17:57 (back 19:25) Corey and guest to LVEA (for tour)
- 18:04 LN2 delivery to MX
- 18:12 (back 19:08) Ed to LVEA (Oplev centering)
- 18:15 (back 18:22) Jason to optics lab
- 18:21 (back 18:46) Fil and Richard to CER mezzanine (changing microphone power supplies)
- 18:33 (back 18:59) Hugh and Scott to LVEA (HAM9/10)
- 18:41 (back 18:58) Jason to LVEA (ITMX Oplev)
- 18:55 (back 19:49) Sheila to LVEA (measuring dark noise near HAM6)
- 19:08 Greg rebooting DMT
- 19:09 (back 19:25) Scott to LVEA (finding tooling)
- 19:11 (back 19:19) Ed and Fil to LVEA (near ISCT6)
- 19:42 Sensor correction on. Starting some adjustments on MICH_BRIGHT_ALIGN before beginning locking
- 20:31 Niko to optics lab
- 21:20 Locking attempt started
Lights are off in end stations and Cheryl has swept LVEA.
Violins Possibly Relatated To / Cause of Lockloss at 16:23:55 UTC:
ETMX violin mode 13 was ringing up for most of this lock. The damping was on at first, and at around -24000 seconds the RMS wasaround 0.5, then the damping gain is set to zero, and the mode grows from there until lockloss (t=0). It's notable that ETMY mode 14 drive grows steadily, then has a significant increase at -1400 seconds.