Ops Shift Log: 06/17/2019, Evening Shift 23:00 – 07:00 (16:00 - 00:00) Time - UTC (PT)

State of H1: Locked at NLN, range of 115.9Mpc, with 37.2W of power

Intent Bit: Observing

Support: Georgia

Incoming Operator: TJ

Shift Summary: At 01:27 (18:27) got a CRC error due to problem with H1IOPISCEY. Called Dave B., see aLOG 50009. Lost lock at 01:53 (18:53) as expected when Dave rebooted H1ISCEY. Reset End-Y ISI and HEPI tripped WDs.

 

  At 02:01 (19:01) started relocking. Initially had some issues getting Y-Arm Green to lock. At the time there were several wind gusts in the mid 30mph range. After things settled a bit could reliably lock both arms green. Had to tweak the BS and PRM to get through DRMI_1F. After this, no additional adjustments were needed.

 

   At 03:02 (20:02) and 03:23 (20:23) lost lock at ENG_SOFT_LOOPS. Georgia is looking into these lock losses.

   Have been seeing 30 plus mph gusts at End-X, which is not helping the relocking.

 

   Arrived back at NLN. Accepted several SDF Diffs. Did an INIT on LOCKLOSS_SHUTTER_CHECK node as it was stuck on SHUTTER_FAIL. This was a leftover from the H1ISCEY crash.

   Back in Observing.

 

   Switched to EARTHQUAKE mode for mag5.5 in Tonga. Switched back to WINDY after quake passed.

   The wind remains high (consistently over 20mph) but are laying down a bit.

 

 

Activity Log: Time - UTC (PT)

23:00 (16:00) Take over from Travis

23:11 (16:11) Gerardo – Back from Mid-Y

01:27 (18:27) EY CRC Error (H1IOPISCEY)

01:27 (18:27) Dropped out of Observing – Into Unknown

01:29 (18:29) Dave B. – Looking into the problem

01:53 (18:53) Lockloss – Dave working on recovery of H1IOPISCEY   

02:01 (19:01) Start relocking

03:02 (20:02) Lock loss at ENG_SOFT_LOOPS

03:23 (20:23) Lock loss at ENG_SOFT_LOOPS

03:33 (20:33) Lock loss at CARM_150_PICOMETERS

04:11 (21:11) Locked at NLN

04:15 (21:15) Georgia & Jeff - Cleared SDF Diffs

04:17 (21:17) INIT on LOCKLOSS_SHUTTER_CHECK (was stuck at SHUTTER_FAIL)

04:17 (21:17) Back into Observing mode

05:39 (22:39) Switch to EARTHQUAKE mode for incoming mag 5.5 from Tonga

06:02 (23:02) Switch back to WENDY after EQ passed

07:00 (00:00) Turn over to TJ